sebastian/oca8-lernen
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Compare commits

base: sebastian:c7b534b1d112e9820c07deacf936f74df9e1f839
Branches Tags
sebastian:master
...
compare: sebastian:master
Branches Tags
sebastian:master

17 Commits
c7b534b1d1 ... master

Author SHA1 Message Date
Sebastian Eidecker
b86190b186 Merge remote-tracking branch 'origin/master' 2019-11-28 16:13:47 +01:00
Sebastian Eidecker
87d7f57e25 Listendinge 2019-11-28 16:13:32 +01:00
Sebastian Eidecker
27c32cf193 Letzte Tests vor der Prüfung 2019-11-19 18:49:02 +01:00
Sebastian Eidecker
c6a069facb Letzter Abend 2019-11-18 20:59:11 +01:00
Sebastian Eidecker
85d51d6056 Gemeinsames Lernen 2019-11-18 17:48:21 +01:00
Sebastian Eidecker
09a82863c4 Merge branch 'master' of https://git.eidecker.info/sebastian/oca8-lernen 2019-11-18 12:03:43 +01:00
Sebastian Eidecker
7c568f2e90 Gemeinsames Lernen 2019-11-18 12:03:27 +01:00
Sebastian Eidecker
eed72f2034 Lernen am Sonntag 2019-11-17 21:48:08 +01:00
Sebastian Eidecker
db2d710788 Lernen am Sonntag 2019-11-17 19:18:16 +01:00
Sebastian Eidecker
ffaf3279b8 Lernen am Sonntag 2019-11-17 17:06:42 +01:00
Sebastian Eidecker
6670af736f Lernen am Samstag 2019-11-16 17:05:17 +01:00
Sebastian Eidecker
74050c93b5 Lernen am Samstag 2019-11-16 16:44:25 +01:00
Sebastian Eidecker
17e4bc97f2 Arrays 2019-11-15 22:21:23 +01:00
Sebastian Eidecker
6e2c77ab31 instanceof und Casts 2019-11-14 21:39:21 +01:00
Sebastian Eidecker
53a5fea3da Gemeinsames Lernen 2019-11-14 18:57:49 +01:00
Sebastian Eidecker
8ed6cb5310 Merge remote-tracking branch 'origin/master' 2019-11-13 22:20:46 +01:00
Sebastian Eidecker
baa3ff518a Gemeinsames Lernen 2019-11-13 22:19:42 +01:00
36 changed files with 2086 additions and 13 deletions
Expand all files Collapse all files

16
.idea/checkstyle-idea.xml generated Normal file
View File

@@ -0,0 +1,16 @@
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="CheckStyle-IDEA">
<option name="configuration">
<map>
<entry key="checkstyle-version" value="8.22" />
<entry key="copy-libs" value="true" />
<entry key="location-0" value="BUNDLED:(bundled):Sun Checks" />
<entry key="location-1" value="BUNDLED:(bundled):Google Checks" />
<entry key="scan-before-checkin" value="false" />
<entry key="scanscope" value="JavaOnly" />
<entry key="suppress-errors" value="false" />
</map>
</option>
</component>
</project>

466
.idea/dbnavigator.xml generated Normal file
View File

@@ -0,0 +1,466 @@
<?xml version="1.0" encoding="UTF-8"?>
<project version="4">
<component name="DBNavigator.Project.DataEditorManager">
<record-view-column-sorting-type value="BY_INDEX" />
<value-preview-text-wrapping value="true" />
<value-preview-pinned value="false" />
</component>
<component name="DBNavigator.Project.DataExportManager">
<export-instructions>
<create-header value="true" />
<quote-values-containing-separator value="true" />
<quote-all-values value="false" />
<value-separator value="" />
<file-name value="" />
<file-location value="" />
<scope value="GLOBAL" />
<destination value="FILE" />
<format value="EXCEL" />
<charset value="windows-1252" />
</export-instructions>
</component>
<component name="DBNavigator.Project.DatabaseBrowserManager">
<autoscroll-to-editor value="false" />
<autoscroll-from-editor value="true" />
<show-object-properties value="true" />
<loaded-nodes />
</component>
<component name="DBNavigator.Project.DatabaseFileManager">
<open-files />
</component>
<component name="DBNavigator.Project.EditorStateManager">
<last-used-providers />
</component>
<component name="DBNavigator.Project.MethodExecutionManager">
<method-browser />
<execution-history>
<group-entries value="true" />
<execution-inputs />
</execution-history>
<argument-values-cache />
</component>
<component name="DBNavigator.Project.ObjectDependencyManager">
<last-used-dependency-type value="INCOMING" />
</component>
<component name="DBNavigator.Project.ObjectQuickFilterManager">
<last-used-operator value="EQUAL" />
<filters />
</component>
<component name="DBNavigator.Project.ScriptExecutionManager" clear-outputs="true">
<recently-used-interfaces />
</component>
<component name="DBNavigator.Project.Settings">
<connections />
<browser-settings>
<general>
<display-mode value="TABBED" />
<navigation-history-size value="100" />
<show-object-details value="false" />
</general>
<filters>
<object-type-filter>
<object-type name="SCHEMA" enabled="true" />
<object-type name="USER" enabled="true" />
<object-type name="ROLE" enabled="true" />
<object-type name="PRIVILEGE" enabled="true" />
<object-type name="CHARSET" enabled="true" />
<object-type name="TABLE" enabled="true" />
<object-type name="VIEW" enabled="true" />
<object-type name="MATERIALIZED_VIEW" enabled="true" />
<object-type name="NESTED_TABLE" enabled="true" />
<object-type name="COLUMN" enabled="true" />
<object-type name="INDEX" enabled="true" />
<object-type name="CONSTRAINT" enabled="true" />
<object-type name="DATASET_TRIGGER" enabled="true" />
<object-type name="DATABASE_TRIGGER" enabled="true" />
<object-type name="SYNONYM" enabled="true" />
<object-type name="SEQUENCE" enabled="true" />
<object-type name="PROCEDURE" enabled="true" />
<object-type name="FUNCTION" enabled="true" />
<object-type name="PACKAGE" enabled="true" />
<object-type name="TYPE" enabled="true" />
<object-type name="TYPE_ATTRIBUTE" enabled="true" />
<object-type name="ARGUMENT" enabled="true" />
<object-type name="DIMENSION" enabled="true" />
<object-type name="CLUSTER" enabled="true" />
<object-type name="DBLINK" enabled="true" />
</object-type-filter>
</filters>
<sorting>
<object-type name="COLUMN" sorting-type="NAME" />
<object-type name="FUNCTION" sorting-type="NAME" />
<object-type name="PROCEDURE" sorting-type="NAME" />
<object-type name="ARGUMENT" sorting-type="POSITION" />
</sorting>
<default-editors>
<object-type name="VIEW" editor-type="SELECTION" />
<object-type name="PACKAGE" editor-type="SELECTION" />
<object-type name="TYPE" editor-type="SELECTION" />
</default-editors>
</browser-settings>
<navigation-settings>
<lookup-filters>
<lookup-objects>
<object-type name="SCHEMA" enabled="true" />
<object-type name="USER" enabled="false" />
<object-type name="ROLE" enabled="false" />
<object-type name="PRIVILEGE" enabled="false" />
<object-type name="CHARSET" enabled="false" />
<object-type name="TABLE" enabled="true" />
<object-type name="VIEW" enabled="true" />
<object-type name="MATERIALIZED VIEW" enabled="true" />
<object-type name="NESTED TABLE" enabled="false" />
<object-type name="COLUMN" enabled="false" />
<object-type name="INDEX" enabled="true" />
<object-type name="CONSTRAINT" enabled="true" />
<object-type name="DATASET TRIGGER" enabled="true" />
<object-type name="DATABASE TRIGGER" enabled="true" />
<object-type name="SYNONYM" enabled="false" />
<object-type name="SEQUENCE" enabled="true" />
<object-type name="PROCEDURE" enabled="true" />
<object-type name="FUNCTION" enabled="true" />
<object-type name="PACKAGE" enabled="true" />
<object-type name="TYPE" enabled="true" />
<object-type name="TYPE ATTRIBUTE" enabled="false" />
<object-type name="ARGUMENT" enabled="false" />
<object-type name="DIMENSION" enabled="false" />
<object-type name="CLUSTER" enabled="false" />
<object-type name="DBLINK" enabled="true" />
</lookup-objects>
<force-database-load value="false" />
<prompt-connection-selection value="true" />
<prompt-schema-selection value="true" />
</lookup-filters>
</navigation-settings>
<dataset-grid-settings>
<general>
<enable-zooming value="true" />
<enable-column-tooltip value="true" />
</general>
<sorting>
<nulls-first value="true" />
<max-sorting-columns value="4" />
</sorting>
<tracking-columns>
<columnNames value="" />
<visible value="true" />
<editable value="false" />
</tracking-columns>
</dataset-grid-settings>
<dataset-editor-settings>
<text-editor-popup>
<active value="false" />
<active-if-empty value="false" />
<data-length-threshold value="100" />
<popup-delay value="1000" />
</text-editor-popup>
<values-actions-popup>
<show-popup-button value="true" />
<element-count-threshold value="1000" />
<data-length-threshold value="250" />
</values-actions-popup>
<general>
<fetch-block-size value="100" />
<fetch-timeout value="30" />
<trim-whitespaces value="true" />
<convert-empty-strings-to-null value="true" />
<select-content-on-cell-edit value="true" />
<large-value-preview-active value="true" />
</general>
<filters>
<prompt-filter-dialog value="true" />
<default-filter-type value="BASIC" />
</filters>
<qualified-text-editor text-length-threshold="300">
<content-types>
<content-type name="Text" enabled="true" />
<content-type name="Properties" enabled="true" />
<content-type name="XML" enabled="true" />
<content-type name="DTD" enabled="true" />
<content-type name="HTML" enabled="true" />
<content-type name="XHTML" enabled="true" />
<content-type name="CSS" enabled="true" />
<content-type name="Java" enabled="true" />
<content-type name="SQL" enabled="true" />
<content-type name="PL/SQL" enabled="true" />
<content-type name="JavaScript" enabled="true" />
<content-type name="JSP" enabled="true" />
<content-type name="JSPx" enabled="true" />
<content-type name="Groovy" enabled="true" />
<content-type name="FTL" enabled="true" />
<content-type name="TML" enabled="true" />
<content-type name="GSP" enabled="true" />
<content-type name="ASP" enabled="true" />
<content-type name="VTL" enabled="true" />
<content-type name="AIDL" enabled="true" />
<content-type name="YAML" enabled="true" />
<content-type name="Flex" enabled="true" />
<content-type name="Manifest" enabled="true" />
</content-types>
</qualified-text-editor>
<record-navigation>
<navigation-target value="VIEWER" />
</record-navigation>
</dataset-editor-settings>
<code-editor-settings>
<general>
<show-object-navigation-gutter value="false" />
<show-spec-declaration-navigation-gutter value="true" />
<enable-spellchecking value="true" />
<enable-reference-spellchecking value="false" />
</general>
<confirmations>
<save-changes value="false" />
<revert-changes value="true" />
</confirmations>
</code-editor-settings>
<code-completion-settings>
<filters>
<basic-filter>
<filter-element type="RESERVED_WORD" id="keyword" selected="true" />
<filter-element type="RESERVED_WORD" id="function" selected="true" />
<filter-element type="RESERVED_WORD" id="parameter" selected="true" />
<filter-element type="RESERVED_WORD" id="datatype" selected="true" />
<filter-element type="RESERVED_WORD" id="exception" selected="true" />
<filter-element type="OBJECT" id="schema" selected="true" />
<filter-element type="OBJECT" id="role" selected="true" />
<filter-element type="OBJECT" id="user" selected="true" />
<filter-element type="OBJECT" id="privilege" selected="true" />
<user-schema>
<filter-element type="OBJECT" id="table" selected="true" />
<filter-element type="OBJECT" id="view" selected="true" />
<filter-element type="OBJECT" id="materialized view" selected="true" />
<filter-element type="OBJECT" id="index" selected="true" />
<filter-element type="OBJECT" id="constraint" selected="true" />
<filter-element type="OBJECT" id="trigger" selected="true" />
<filter-element type="OBJECT" id="synonym" selected="false" />
<filter-element type="OBJECT" id="sequence" selected="true" />
<filter-element type="OBJECT" id="procedure" selected="true" />
<filter-element type="OBJECT" id="function" selected="true" />
<filter-element type="OBJECT" id="package" selected="true" />
<filter-element type="OBJECT" id="type" selected="true" />
<filter-element type="OBJECT" id="dimension" selected="true" />
<filter-element type="OBJECT" id="cluster" selected="true" />
<filter-element type="OBJECT" id="dblink" selected="true" />
</user-schema>
<public-schema>
<filter-element type="OBJECT" id="table" selected="false" />
<filter-element type="OBJECT" id="view" selected="false" />
<filter-element type="OBJECT" id="materialized view" selected="false" />
<filter-element type="OBJECT" id="index" selected="false" />
<filter-element type="OBJECT" id="constraint" selected="false" />
<filter-element type="OBJECT" id="trigger" selected="false" />
<filter-element type="OBJECT" id="synonym" selected="false" />
<filter-element type="OBJECT" id="sequence" selected="false" />
<filter-element type="OBJECT" id="procedure" selected="false" />
<filter-element type="OBJECT" id="function" selected="false" />
<filter-element type="OBJECT" id="package" selected="false" />
<filter-element type="OBJECT" id="type" selected="false" />
<filter-element type="OBJECT" id="dimension" selected="false" />
<filter-element type="OBJECT" id="cluster" selected="false" />
<filter-element type="OBJECT" id="dblink" selected="false" />
</public-schema>
<any-schema>
<filter-element type="OBJECT" id="table" selected="true" />
<filter-element type="OBJECT" id="view" selected="true" />
<filter-element type="OBJECT" id="materialized view" selected="true" />
<filter-element type="OBJECT" id="index" selected="true" />
<filter-element type="OBJECT" id="constraint" selected="true" />
<filter-element type="OBJECT" id="trigger" selected="true" />
<filter-element type="OBJECT" id="synonym" selected="true" />
<filter-element type="OBJECT" id="sequence" selected="true" />
<filter-element type="OBJECT" id="procedure" selected="true" />
<filter-element type="OBJECT" id="function" selected="true" />
<filter-element type="OBJECT" id="package" selected="true" />
<filter-element type="OBJECT" id="type" selected="true" />
<filter-element type="OBJECT" id="dimension" selected="true" />
<filter-element type="OBJECT" id="cluster" selected="true" />
<filter-element type="OBJECT" id="dblink" selected="true" />
</any-schema>
</basic-filter>
<extended-filter>
<filter-element type="RESERVED_WORD" id="keyword" selected="true" />
<filter-element type="RESERVED_WORD" id="function" selected="true" />
<filter-element type="RESERVED_WORD" id="parameter" selected="true" />
<filter-element type="RESERVED_WORD" id="datatype" selected="true" />
<filter-element type="RESERVED_WORD" id="exception" selected="true" />
<filter-element type="OBJECT" id="schema" selected="true" />
<filter-element type="OBJECT" id="user" selected="true" />
<filter-element type="OBJECT" id="role" selected="true" />
<filter-element type="OBJECT" id="privilege" selected="true" />
<user-schema>
<filter-element type="OBJECT" id="table" selected="true" />
<filter-element type="OBJECT" id="view" selected="true" />
<filter-element type="OBJECT" id="materialized view" selected="true" />
<filter-element type="OBJECT" id="index" selected="true" />
<filter-element type="OBJECT" id="constraint" selected="true" />
<filter-element type="OBJECT" id="trigger" selected="true" />
<filter-element type="OBJECT" id="synonym" selected="true" />
<filter-element type="OBJECT" id="sequence" selected="true" />
<filter-element type="OBJECT" id="procedure" selected="true" />
<filter-element type="OBJECT" id="function" selected="true" />
<filter-element type="OBJECT" id="package" selected="true" />
<filter-element type="OBJECT" id="type" selected="true" />
<filter-element type="OBJECT" id="dimension" selected="true" />
<filter-element type="OBJECT" id="cluster" selected="true" />
<filter-element type="OBJECT" id="dblink" selected="true" />
</user-schema>
<public-schema>
<filter-element type="OBJECT" id="table" selected="true" />
<filter-element type="OBJECT" id="view" selected="true" />
<filter-element type="OBJECT" id="materialized view" selected="true" />
<filter-element type="OBJECT" id="index" selected="true" />
<filter-element type="OBJECT" id="constraint" selected="true" />
<filter-element type="OBJECT" id="trigger" selected="true" />
<filter-element type="OBJECT" id="synonym" selected="true" />
<filter-element type="OBJECT" id="sequence" selected="true" />
<filter-element type="OBJECT" id="procedure" selected="true" />
<filter-element type="OBJECT" id="function" selected="true" />
<filter-element type="OBJECT" id="package" selected="true" />
<filter-element type="OBJECT" id="type" selected="true" />
<filter-element type="OBJECT" id="dimension" selected="true" />
<filter-element type="OBJECT" id="cluster" selected="true" />
<filter-element type="OBJECT" id="dblink" selected="true" />
</public-schema>
<any-schema>
<filter-element type="OBJECT" id="table" selected="true" />
<filter-element type="OBJECT" id="view" selected="true" />
<filter-element type="OBJECT" id="materialized view" selected="true" />
<filter-element type="OBJECT" id="index" selected="true" />
<filter-element type="OBJECT" id="constraint" selected="true" />
<filter-element type="OBJECT" id="trigger" selected="true" />
<filter-element type="OBJECT" id="synonym" selected="true" />
<filter-element type="OBJECT" id="sequence" selected="true" />
<filter-element type="OBJECT" id="procedure" selected="true" />
<filter-element type="OBJECT" id="function" selected="true" />
<filter-element type="OBJECT" id="package" selected="true" />
<filter-element type="OBJECT" id="type" selected="true" />
<filter-element type="OBJECT" id="dimension" selected="true" />
<filter-element type="OBJECT" id="cluster" selected="true" />
<filter-element type="OBJECT" id="dblink" selected="true" />
</any-schema>
</extended-filter>
</filters>
<sorting enabled="true">
<sorting-element type="RESERVED_WORD" id="keyword" />
<sorting-element type="RESERVED_WORD" id="datatype" />
<sorting-element type="OBJECT" id="column" />
<sorting-element type="OBJECT" id="table" />
<sorting-element type="OBJECT" id="view" />
<sorting-element type="OBJECT" id="materialized view" />
<sorting-element type="OBJECT" id="index" />
<sorting-element type="OBJECT" id="constraint" />
<sorting-element type="OBJECT" id="trigger" />
<sorting-element type="OBJECT" id="synonym" />
<sorting-element type="OBJECT" id="sequence" />
<sorting-element type="OBJECT" id="procedure" />
<sorting-element type="OBJECT" id="function" />
<sorting-element type="OBJECT" id="package" />
<sorting-element type="OBJECT" id="type" />
<sorting-element type="OBJECT" id="dimension" />
<sorting-element type="OBJECT" id="cluster" />
<sorting-element type="OBJECT" id="dblink" />
<sorting-element type="OBJECT" id="schema" />
<sorting-element type="OBJECT" id="role" />
<sorting-element type="OBJECT" id="user" />
<sorting-element type="RESERVED_WORD" id="function" />
<sorting-element type="RESERVED_WORD" id="parameter" />
</sorting>
<format>
<enforce-code-style-case value="true" />
</format>
</code-completion-settings>
<execution-engine-settings>
<statement-execution>
<fetch-block-size value="100" />
<execution-timeout value="20" />
<debug-execution-timeout value="600" />
<focus-result value="false" />
<prompt-execution value="false" />
</statement-execution>
<script-execution>
<command-line-interfaces />
<execution-timeout value="300" />
</script-execution>
<method-execution>
<execution-timeout value="30" />
<debug-execution-timeout value="600" />
<parameter-history-size value="10" />
</method-execution>
</execution-engine-settings>
<operation-settings>
<transactions>
<uncommitted-changes>
<on-project-close value="ASK" />
<on-disconnect value="ASK" />
<on-autocommit-toggle value="ASK" />
</uncommitted-changes>
<multiple-uncommitted-changes>
<on-commit value="ASK" />
<on-rollback value="ASK" />
</multiple-uncommitted-changes>
</transactions>
<session-browser>
<disconnect-session value="ASK" />
<kill-session value="ASK" />
<reload-on-filter-change value="false" />
</session-browser>
<compiler>
<compile-type value="KEEP" />
<compile-dependencies value="ASK" />
<always-show-controls value="false" />
</compiler>
<debugger>
<debugger-type value="ASK" />
<use-generic-runners value="true" />
</debugger>
</operation-settings>
<ddl-file-settings>
<extensions>
<mapping file-type-id="VIEW" extensions="vw" />
<mapping file-type-id="TRIGGER" extensions="trg" />
<mapping file-type-id="PROCEDURE" extensions="prc" />
<mapping file-type-id="FUNCTION" extensions="fnc" />
<mapping file-type-id="PACKAGE" extensions="pkg" />
<mapping file-type-id="PACKAGE_SPEC" extensions="pks" />
<mapping file-type-id="PACKAGE_BODY" extensions="pkb" />
<mapping file-type-id="TYPE" extensions="tpe" />
<mapping file-type-id="TYPE_SPEC" extensions="tps" />
<mapping file-type-id="TYPE_BODY" extensions="tpb" />
</extensions>
<general>
<lookup-ddl-files value="true" />
<create-ddl-files value="false" />
<synchronize-ddl-files value="true" />
<use-qualified-names value="false" />
<make-scripts-rerunnable value="true" />
</general>
</ddl-file-settings>
<general-settings>
<regional-settings>
<date-format value="MEDIUM" />
<number-format value="UNGROUPED" />
<locale value="SYSTEM_DEFAULT" />
<use-custom-formats value="false" />
</regional-settings>
<environment>
<environment-types>
<environment-type id="development" name="Development" description="Development environment" color="-2430209/-12296320" readonly-code="false" readonly-data="false" />
<environment-type id="integration" name="Integration" description="Integration environment" color="-2621494/-12163514" readonly-code="true" readonly-data="false" />
<environment-type id="production" name="Production" description="Productive environment" color="-11574/-10271420" readonly-code="true" readonly-data="true" />
<environment-type id="other" name="Other" description="" color="-1576/-10724543" readonly-code="false" readonly-data="false" />
</environment-types>
<visibility-settings>
<connection-tabs value="true" />
<dialog-headers value="true" />
<object-editor-tabs value="true" />
<script-editor-tabs value="false" />
<execution-result-tabs value="true" />
</visibility-settings>
</environment>
</general-settings>
</component>
<component name="DBNavigator.Project.StatementExecutionManager">
<execution-variables />
</component>
</project>

57
src/org/eidecker/mapreduce/DistanceCounter.java Normal file
View File

@@ -0,0 +1,57 @@
package org.eidecker.mapreduce;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import org.junit.jupiter.api.Test;
/**
* @author seidecke.
*/
public class DistanceCounter {
private static Integer komplizierteBerechnungMitRestCall(Integer strecke, Integer strecke2) {
return strecke2 - strecke;
}
@Test
public void testDistanceSum() {
assertEquals(55, distanceSum(orte()));
}
private Integer distanceSum(List<Stopp> orte) {
Optional<Integer> distanceSum = orte.stream()
.map(Stopp::getWichtigeDingeZurBerechnung)
.reduce(DistanceCounter::komplizierteBerechnungMitRestCall);
return distanceSum.orElse(0);
}
private List<Stopp> orte() {
return IntStream.rangeClosed(1,10).boxed().map(Stopp::new).collect(Collectors.toList());
}
// private BinaryOperator<Ort> distanceAdder = (ort, ort2) -> ort2.getWert() - ort.getWert();
//
// private BiFunction<Ort, Ort, Integer> distanceAdder = (ort, ort2) -> ort2.getWert() - ort.getWert();
class Stopp {
Integer wert;
public Stopp(Integer wert) {
this.wert = wert;
}
public Integer getWichtigeDingeZurBerechnung() {
return wert;
}
}
}

11
src/org/eidecker/oca8lernen/chapter01/EnumOne.java
View File

@@ -2,6 +2,12 @@ package org.eidecker.oca8lernen.chapter01;
import org.junit.jupiter.api.Test;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
/**
* @author seidecke.
*/
@@ -21,9 +27,14 @@ class TestClass {
for (B item : B.values()) {
System.out.println(item);
}
int i = 1;
}
private enum Two {
EINS, ZWEI;

35
src/org/eidecker/oca8lernen/general/ArrayFun.java Normal file
View File

@@ -0,0 +1,35 @@
package org.eidecker.oca8lernen.general;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
/**
* @author seidecke.
*/
public class ArrayFun {
char index;
@Test
public void testArrayInit() {
String[] strings = {"Hallo", "Welt"};
assertEquals(0, index);
assertEquals("Hallo", strings[index]);
assertEquals("Hallo", strings[(byte) 1]);
assertEquals("Hallo", strings[(short) 1]);
assertEquals("Hallo", strings[(char) 1]);
// assertEquals("Hallo", strings[(float) 1]); // Compilerfehler, muss Ganzzahl sein
// assertEquals("Hallo", strings[(long) 1]); // Compilerfehler, muss int oder kleiner sein
// Arrayklammern vor und nach Variablenname erlaubt
String [] twodim [];
String[][] twoDimStrings = {strings};
}
}

77
src/org/eidecker/oca8lernen/general/CastExceptions.java Normal file
View File

@@ -0,0 +1,77 @@
package org.eidecker.oca8lernen.general;
import static org.junit.jupiter.api.Assertions.assertThrows;
import org.junit.jupiter.api.Test;
import java.io.IOException;
import java.nio.file.AccessDeniedException;
import java.util.List;
import java.util.zip.DataFormatException;
/**
* @author seidecke.
*/
public class CastExceptions {
@Test
public void testCastExceptions() {
OberCast eigentlichUnter = new UnterCast();
OberCast wirklichOber = new OberCast();
UnterCast purUnter = new UnterCast();
Außerhalb außerhalb = new Außerhalb();
OberCast ober = purUnter;
UnterCast unter = (UnterCast) eigentlichUnter;
// Runtime-Exception, da innerhalb der Typenhierarchie
assertThrows(ClassCastException.class, () -> {
UnterCast unter3 = (UnterCast) wirklichOber;
});
// Compilefehler, da Versuch des Casts außerhalb der Typenhierarchie
// UnterCast unter2 = (UnterCast) außerhalb;
try {
UnterCast unterCast = new UnterCast();
unter.method();
} catch (RuntimeException e) {
}
}
}
class OberCast {
public void method() throws IOException{
Integer i;
long l2 = (int)12;
int i2 = 2;
i = (int)i2;
}
}
class UnterCast extends OberCast {
@Override
public void method() {
System.out.println("method in Untercast");
}
}
class Außerhalb {
}
class MyCheckedException extends Exception {
}

72
src/org/eidecker/oca8lernen/general/ConditionalInitialisation.java Normal file
View File

@@ -0,0 +1,72 @@
package org.eidecker.oca8lernen.general;
import org.junit.jupiter.api.Test;
public class ConditionalInitialisation {
final String s2;
final String s3;
// final String s4;
public ConditionalInitialisation() {
boolean b = true;
if (b) {
s2 = "Hallo";
} else {
s2 = "Welt";
}
// Keine doppelte Zuweisung, da Compiler auflösen kann
if (true) s3= "Hallo";
if (false) s3 = "Welt";
String s6;
final boolean c = false;
if (c) s6 = "Hallo";
if (!c) s6 = "Welt";
System.out.println(s6);
// Geht nicht, damit sowohl Verletzung final-Zuweisung als auch Nicht-Initialisierung
// if (b) s4 = "Hallo";
// if (!b) s4 = "Welt";
try {
// s4 = fillMe();
} catch (Exception e) {
// s4 = fillMeSilently();
}
String s5;
try {
s5 = fillMe();
} catch (Exception e) {
s5 = fillMeSilently();
}
}
private String fillMe() throws Exception {
return "Hallo";
}
private String fillMeSilently() throws RuntimeException {
return "Welt";
}
@Test
public void testConditionalInitialisation() {
boolean b = true;
final String s;
if (b) {
s = "Hallo";
} else {
s = "Welt";
}
System.out.println(s);
}
}

135
src/org/eidecker/oca8lernen/general/DoubleImplementsClash.java Normal file
View File

@@ -0,0 +1,135 @@
package org.eidecker.oca8lernen.general;
import java.io.IOException;
import java.nio.file.AccessDeniedException;
import java.util.zip.DataFormatException;
import org.junit.jupiter.api.Test;
/**
* @author seidecke.
*/
public class DoubleImplementsClash {
@Test
public void testSomeTHings() {
InterfaceImplementer implementer = new InterfaceImplementer();
// implementer.bothStatic() // Nicht vorhanden, nur im Interface
implementer.bothDefault();
implementer.singleDefault();
implementer.abstractClassAndInterfaceDefault();
}
}
class InterfaceImplementer extends AbstractClass implements SuperInterface1, SuperInterface2{
public void methode (int ...name ) {
// methode2(1,3,4); // Geht nicht, muss Array sein
methode2(name);
}
public void methode2 (int[] name) {
methode(1, 2, 3);
int [] ints = {1,2,3};
methode(ints);
System.out.println(new StringBuilder("Hallo").toString());
}
@Test
public void testSomething() {
SuperInterface1.bothStatic();
this.bothAbstract();
SuperInterface1.super.singleDefault();
this.singleDefault();
}
@Override
public void bothAbstract() {
}
public void bothDefault() {
SuperInterface1.super.bothDefault();
}
public void oneStaticOneAbstract() {
}
}
class AnotherImplementer implements SuperInterface1 {
@Override
public void bothAbstract() {
}
@Override
public void oneStaticOneAbstract() {
}
}
interface SuperInterface1 {
static void bothStatic() {
}
default void bothDefault() {
}
default void singleDefault() {
}
void bothAbstract();
void oneStaticOneAbstract();
}
interface SuperInterface2 {
static void bothStatic() {
}
default void bothDefault() {
}
void bothAbstract();
static void oneStaticOneAbstract() {
}
default void abstractClassAndInterfaceDefault() {
System.out.println("SuperInterface2 abstractClassAndInterfaceDefault");
"Halli".length();
}
}
abstract class AbstractClass {
public void abstractClassAndInterfaceDefault() {
System.out.println("AbstractClass abstractClassAndInterfaceDefault");
}
public void throwsException() throws IOException {
}
}
class ErbendeKlasse extends AbstractClass {
@Override
public void throwsException() throws AccessDeniedException {
new ErbendeKlasse();
}
}

39
src/org/eidecker/oca8lernen/general/Final.java Normal file
View File

@@ -0,0 +1,39 @@
package org.eidecker.oca8lernen.general;
import java.util.concurrent.ExecutionException;
import org.junit.jupiter.api.Test;
/**
* Final deklarierte Felder müssen im Konstruktor oder einem Initialisierungsblock gesetzt werden.
* Die Standardwerte genügen nicht.
*/
public class Final {
{
String s = "s";
finalString = "Hallo";
if (false) throw new RuntimeException();
testIfBloecke();
}
{
String s = "s";
}
final String finalString;
public Final() {
}
@Test
public void testIfBloecke() {
if (true)
System.out.println("Eins");
if (false)
System.out.println("Zwei");
else
System.out.printf("Drei");
}
}

24
src/org/eidecker/oca8lernen/general/ForEach.java Normal file
View File

@@ -0,0 +1,24 @@
package org.eidecker.oca8lernen.general;
import java.util.List;
import org.junit.jupiter.api.Test;
/**
* @author seidecke.
*/
public class ForEach {
@Test
public void testLaufvariable() {
int[] ints = new int[5];
for (int i: ints)
System.out.println(i);
List<String> sList;
}
}

35
src/org/eidecker/oca8lernen/general/FunWithArrays.java Normal file
View File

@@ -0,0 +1,35 @@
package org.eidecker.oca8lernen.general;
import org.junit.jupiter.api.Test;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
public class FunWithArrays {
@Test
public void testArrays() {
int[] ints = new int[] {1, 3, 4, 6, 7};
List[] lists = {new ArrayList(), new ArrayList()};
ArrayList[] arrayLists = {new ArrayList(), new ArrayList()};
int [] one = {1,2,4};
int [][] tow = {one};
int[][][][] strings = new int[3][3][][];
strings[1][2] = new int[][]{{1},{2}};
System.out.println(strings[1][2].getClass().getName());
// lists = arrayLists;
// arrayLists = (ArrayList[]) lists;
arrayLists[0].size();
}
}

49
src/org/eidecker/oca8lernen/general/HeaderList.java
View File

@@ -1,9 +1,58 @@
package org.eidecker.oca8lernen.general;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import org.junit.jupiter.api.Test;
/**
* @author seidecke.
*/
public class HeaderList extends ArrayList {
}
class Listtest {
@Test
public void testListInterface() {
anyList().add("Hallo");
}
@Test
public void testHashMapInterface() {
Map<String, List<String>> map = new HashMap<>();
List<String> l = new ArrayList<>();
l.add("1");
map.put("1", l);
map.get("1").add("2");
System.out.println(map.values());
}
private List<String> anyList() {
return Collections.emptyList();
}
@Test
public void longList() {
LinkedList linkedList = new LinkedList();
for (int i = 0; i <= Integer.MAX_VALUE; i++) {
linkedList.add(i);
if (i % 1_000_000 == 0) System.out.println(i / 1_000_000 + " Millionen, " + (((double)i / Integer.MAX_VALUE) * 100) + " Prozent");
}
linkedList.add(-1);
}
}

84
src/org/eidecker/oca8lernen/general/InstanceOfUndCast.java Normal file
View File

@@ -0,0 +1,84 @@
package org.eidecker.oca8lernen.general;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import java.lang.reflect.Array;
import org.junit.jupiter.api.Test;
public class InstanceOfUndCast {
@Test
public void testInstanceof() {
// Instanceof außerhalb Typhierarchie nicht möglich
// boolean b = "Hallo" instanceof InstanceOfUndCast;
assertEquals(false, null instanceof InstanceOfUndCast);
String s;
// Nicht möglich, da nicht initialisiert
// s instanceof String;
int[] array = {1, 3, 4};
assertEquals(true, array instanceof Object);
// Nicht möglich, null kein Typ
// "Hallo" instanceof null
}
@Test
public void testPrimitiveCast() {
byte a = 4;
a = (byte) (a + 3); // Expliziter Cast erforderlich
byte b = 2;
b += 3;
}
@Test
public void testCast() {
OberCast echterOber = new OberCast();
OberCast oberAberUnter = new UnterCast();
UnterCast echterUnterCast = new UnterCast();
String s = (String) null;
echterOber = (UnterCast) echterUnterCast;
echterOber = oberAberUnter;
echterUnterCast = (UnterCast) oberAberUnter;
assertThrows(ClassCastException.class, () -> {
UnterCast echterUnterCast2 = new UnterCast();
OberCast echterOber2 = new OberCast();
echterUnterCast2 = (UnterCast) echterOber2;
});
{int i, j;}
for (int i = 1; i< 3; i++) {
}
}
class OberCast {
}
class UnterCast extends OberCast {
void untercast() {
System.out.printf("untercast");
}
}
class AußerhalbCast {
}
}

8
src/org/eidecker/oca8lernen/general/InterfaceWithFields.java
View File

@@ -1,5 +1,7 @@
package org.eidecker.oca8lernen.general;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class InterfaceWithFields implements T1, T2 {
@@ -18,6 +20,8 @@ public class InterfaceWithFields implements T1, T2 {
interface T1 {
int VALUE = 99;
int VALUE_T1 = 1;
default int getValue() {return VALUE;}
}
interface T2 {
@@ -31,11 +35,15 @@ interface T2 {
class Tester {
@Test
public void interfaceTest() {
InterfaceWithFields interfaceWithFields = new InterfaceWithFields();
assertEquals(99, ((T1)interfaceWithFields).VALUE);
assertEquals(98, ((T2)interfaceWithFields).VALUE);
T1 t1 = new InterfaceWithFields();
System.out.println(t1.getValue());
assertEquals(1, interfaceWithFields.VALUE_T1);
assertEquals(2, interfaceWithFields.VALUE_T2);
}

6
src/org/eidecker/oca8lernen/general/Interfaces.java
View File

@@ -1,8 +1,6 @@
package org.eidecker.oca8lernen.general;
import com.sun.xml.internal.ws.policy.privateutil.PolicyUtils;
import java.io.IOException;
import java.nio.file.AccessDeniedException;
import org.junit.jupiter.api.Test;
class TestInterfaces {
@@ -16,7 +14,7 @@ class TestInterfaces {
}
public class Interfaces extends AbstractClass implements I1 {
public class Interfaces extends SomeAbstractClass implements I1 {
public void method1() {
@@ -32,7 +30,7 @@ public class Interfaces extends AbstractClass implements I1 {
}
abstract class AbstractClass {
abstract class SomeAbstractClass {
public abstract void method1() throws IOException;

16
src/org/eidecker/oca8lernen/general/KLassenInitialisierung.java → src/org/eidecker/oca8lernen/general/KlassenInitialisierung.java
View File

@@ -2,7 +2,7 @@ package org.eidecker.oca8lernen.general;
import org.junit.jupiter.api.Test;
public class KLassenInitialisierung {
public class KlassenInitialisierung {
@Test
public void testInitialisierung() {
@@ -26,6 +26,8 @@ public class KLassenInitialisierung {
class Oberklasse {
private String s = initString();
static {
synchronized (Oberklasse.class) {
System.out.println("Oberklasse statischer Initialisierungsblock");
@@ -54,10 +56,17 @@ class Oberklasse {
}
private String initString() {
System.out.println("OberklasseString wurde initialisiert");
return "OberklasseString";
}
}
class Unterklasse extends Oberklasse {
private String s = initString();
static {
System.out.println("Unterklasse statischer Initialisierungsblock");
}
@@ -78,4 +87,9 @@ class Unterklasse extends Oberklasse {
public Unterklasse() {
System.out.println("Unterklasse Konstruktor");
}
private String initString() {
System.out.println("UnterklasseString wurde initialisiert");
return "UnterklasseString";
}
}

23
src/org/eidecker/oca8lernen/general/Loop.java Normal file
View File

@@ -0,0 +1,23 @@
package org.eidecker.oca8lernen.general;
import org.junit.jupiter.api.Test;
public class Loop {
@Test
public void testLoops() {
int i = 1;
/*do
System.out.println("Hallo");
while(i == 1);
*/
System.out.println("Hallo");
do
System.out.println("Hallo");
while(true);
}
}

45
src/org/eidecker/oca8lernen/general/Overloading.java
View File

@@ -1,14 +1,18 @@
package org.eidecker.oca8lernen.general;
import org.junit.jupiter.api.Test;
import static org.eidecker.oca8lernen.general.PrimitiveOverloading.VARIANTE_BYTE;
import static org.eidecker.oca8lernen.general.PrimitiveOverloading.VARIANTE_CHAR;
import static org.eidecker.oca8lernen.general.PrimitiveOverloading.VARIANTE_CHARACTER;
import static org.eidecker.oca8lernen.general.PrimitiveOverloading.VARIANTE_INT;
import static org.eidecker.oca8lernen.general.PrimitiveOverloading.VARIANTE_INTEGER;
import static org.eidecker.oca8lernen.general.PrimitiveOverloading.VARIANTE_LONG_PRIMITIVE;
import static org.eidecker.oca8lernen.general.PrimitiveOverloading.VARIANTE_LONG_WRAPPER;
import static org.junit.jupiter.api.Assertions.assertEquals;
import java.util.ArrayList;
import java.util.LinkedList;
import java.util.List;
import static org.eidecker.oca8lernen.general.PrimitiveOverloading.*;
import static org.eidecker.oca8lernen.general.Overloading.*;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
class OverloadingTester {
@@ -21,6 +25,9 @@ class OverloadingTester {
SubOverloading subOverloading = new SubOverloading();
System.out.println(subOverloading.staticString);
System.out.println(subOverloading.overrideStatic());
List l = null;
subOverloading.overloadMe(l);
}
}
@@ -195,6 +202,11 @@ class PrimitiveOverloading {
return VARIANTE_BYTE;
}
public String neuerVersuch(byte l) {
System.out.println("long");
return "long";
}
}
class PrimitiveOverloadingTester {
@@ -222,7 +234,30 @@ class PrimitiveOverloadingTester {
// Primitiv, nicht vorhanden, auch kein Wrapper
assertEquals(VARIANTE_INT, primitiveOverloading.overloadMe((short) 1));
primitiveOverloading.neuerVersuch((char)12);
OverloadMe2 overloadMe2 = new OverloadMe2();
// overloadMe2.one(1, 1);
overloadMe2.two(new Integer(1));
}
}
class OverloadMe2 {
public int one(double d, int i) {
return 1;
}
public int one(int d, double i) {
return 1;
}
public int two(Long i) {
return 1;
}
}

137
src/org/eidecker/oca8lernen/general/Primitive.java Normal file
View File

@@ -0,0 +1,137 @@
package org.eidecker.oca8lernen.general;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import org.junit.jupiter.api.Test;
public class Primitive {
@Test
public void testSomething() {
// Ein paar Zuweisungen
double d = 3.9;
int i = (int) d;
System.out.println(i);
}
@Test
public void testUnderscores() {
int iDec = 1_1__1;
assertEquals(111, iDec);
int iBinary = 0b10__0_0101_0000;
int iHex = 0xf2_d8;
int iOctal = 0111;
int iOctal2 = new Integer(011);
int iOctal3 = new Integer("011"); // Das wird wohl doch dezimal behandelt
int iOctal4 = new Integer("0b11");
assertFalse(iOctal2 == iOctal3);
assertFalse(new Integer("1").equals((long)1));
assertFalse(new Long(1).equals(1));
assertNotEquals(111, iOctal);
}
@Test
public void testZuweisungLiterale() {
}
@Test
public void testImplicitCast() {
float f3;
float f = 1.0f;
float f2 = 1L;
f3 = f + f2;
byte b1 = (byte)1f;
char c1 = (char) -1;
System.out.println("c1: " + c1);
short s1 = Short.MAX_VALUE;
short s2 = (short) (s1 + 1);
System.out.println(s2);
short s3 = (short)189898989898989898l;
System.out.println("s3: " + s3);
long l1 = Long.MAX_VALUE;
System.out.println("L1: " + (l1 + 12));
char c = 1, d = 3;
System.out.println(c + d);
int i5 = 1212;
long l4;
l4 = i5;
char c5;
byte b9 = 2;
byte b2 = 'a';
float f9 = Long.MAX_VALUE;
System.out.println("f9: " + f9);
char c10 = (char)123.333d;
System.out.println("c10: " + c10);
Integer I1 = 0b0101;
// Float F1 = (int)12; Float, Double können keine Ganzzahl-Literale zugewiesen werden
Double D1 = (double)12;
// Float F12 = 11;
Float F11 = new Float(11L);
System.out.println("F11" + F11);
float f4 = 4.0f;
long l6 = 4L;
System.out.println("2323: " + (f4 == l6));
Short short1 = 127;
Short short2 = 127;
Short short3 = 128;
Short short4 = 128;
assertTrue(short1 == short2);
assertFalse(short3 == short4);
Short short5 = new Short((short)127);
Short short6 = new Short((short)127);
assertFalse(short5 == short6);
}
@Test
public void testExplicitCast() {
}
}
class AndereKlasse {
public static void main(String[] args) {
System.out.println("Geht auch aus nicht public-Klasse");
}
}

26
src/org/eidecker/oca8lernen/general/PrimitiveUndWrapperTest.java
View File

@@ -12,16 +12,38 @@ public class PrimitiveUndWrapperTest {
@Test
public void zuweisungWertebereich() {
char c = (char) 1L;
byte e, f = 2, g = 4;
// Compilefehler, da + implizit int erzeugt
// e = f + g;
char r, s = 3, t = 4;
// Compilefehler, da + implizit int erzeugt
// r = s + t;
float f1, f2 = 0, f3 = 3;
f1 = f2 + f3;
char c = (char) -1L;
short sh = Short.MAX_VALUE;
// char s = sh;
// char ch = (byte)sh;
"Hallo".concat(" Welt");
// System.out.println(s);
}
@Test
public void literalUnderscore() {
// int i = 1_1_;
double d = 1_1.1_1;
}
@Test
public void wrapperEquals() {

35
src/org/eidecker/oca8lernen/general/Spielen.java Normal file
View File

@@ -0,0 +1,35 @@
package org.eidecker.oca8lernen.general;
import org.junit.jupiter.api.Test;
public class Spielen {
public Spielen() {
}
public Spielen(int n) {
this();
int i = new Integer("2");
}
@Test
public void spielen() {
int i = 1;
printInt(i++ + i);
System.out.println(i);
int k = 1;
printInt(k + k++);
int j = 1;
printInt(j+= 3);
}
private void printInt(int i) {
System.out.println(i);
}
}

76
src/org/eidecker/oca8lernen/general/StringIndex.java Normal file
View File

@@ -0,0 +1,76 @@
package org.eidecker.oca8lernen.general;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import org.junit.jupiter.api.Test;
/**
* @author seidecke.
*/
public class StringIndex {
private static String testString = "1234567890";
@Test
public void testSomeStrings() {
assertEquals('3', testString.charAt(2));
assertEquals("67890", testString.substring(5));
assertEquals("67", testString.substring(5,7));
assertEquals("", testString.substring(5,5));
assertEquals(10, testString.length());
assertThrows(IndexOutOfBoundsException.class, () -> testString.substring(-1));
assertThrows(IndexOutOfBoundsException.class, () -> testString.substring(5,4));
assertThrows(IndexOutOfBoundsException.class, () -> testString.substring(5,11));
String s = "123456";
assertEquals("1234567", s += "7");
}
@Test
public void testSomeStringBuilders() {
StringBuilder testStringBuilder = new StringBuilder("1234567890");
assertEquals('3', testStringBuilder.charAt(2));
testStringBuilder = new StringBuilder("1234567890");
assertEquals("67890", testStringBuilder.substring(5));
testStringBuilder = new StringBuilder("1234567890");
assertEquals("67", testStringBuilder.substring(5,7));
testStringBuilder = new StringBuilder("1234567890");
assertEquals("", testStringBuilder.substring(5,5));
testStringBuilder = new StringBuilder("1234567890");
assertEquals(10, testStringBuilder.length());
testStringBuilder = new StringBuilder("1234567890");
assertThrows(IndexOutOfBoundsException.class, () -> new StringBuilder("1234567890").substring(-1));
testStringBuilder = new StringBuilder("1234567890");
assertThrows(IndexOutOfBoundsException.class, () -> new StringBuilder("1234567890").substring(5,4));
testStringBuilder = new StringBuilder("1234567890");
assertThrows(IndexOutOfBoundsException.class, () -> new StringBuilder("1234567890").substring(5,11));
testStringBuilder = new StringBuilder("1234567890");
assertThrows(IndexOutOfBoundsException.class, () -> new StringBuilder("1234567890").delete(13,1));
testStringBuilder = new StringBuilder("1234567890");
assertThrows(IndexOutOfBoundsException.class, () -> new StringBuilder("1234567890").insert(11,"Hallo"));
// null direkt nicht moeglich, da ueberladene Methode nicht bestimmt werden kann
// testStringBuilder.insert(1, null);
testStringBuilder = new StringBuilder("1234567890");
assertEquals("12345890", testStringBuilder.delete(5,7).toString());
testStringBuilder = new StringBuilder("1234567890");
assertEquals("1234567890", testStringBuilder.delete(5,5).toString());
testStringBuilder = new StringBuilder("1234567890");
assertEquals("71234567890", testStringBuilder.insert(0,7).toString());
testStringBuilder = new StringBuilder("1234567890");
assertEquals("1true234567890", testStringBuilder.insert(1,true).toString());
String s = null;
assertEquals("Hallonull", new StringBuilder("Hallo").append(s).toString());
}
}

46
src/org/eidecker/oca8lernen/general/SwitchSyntax.java
View File

@@ -4,6 +4,14 @@ import org.junit.jupiter.api.Test;
public class SwitchSyntax {
final int k = 0;
public SwitchSyntax() {
switch(1) {
}
}
@Test
public void switchSyntax() {
@@ -16,13 +24,33 @@ public class SwitchSyntax {
break;
}
case 3:
default:
default: {
int j;
System.out.println("default");
}
}
}
// Todo SeEi
@Test
public void switchWithComputation() {
final int i = 3;
switch(getSwitchBEdingung()) {
case i:
System.out.println("i");
break;
case i-1:
System.out.println("i-1");
default:
System.out.println("Was anderes");
}
}
@Test
public void switchString() {
switch (getString()) {
@@ -48,6 +76,22 @@ public class SwitchSyntax {
}
@Test
public void testFinal() {
final int i = 1;
final int j;
j = 2;
switch(getSwitchBEdingung()) {
case i:
System.out.println("i");
case k:
}
}
private Integer getSwitchBEdingung() {
return new Integer(1);
}

15
src/org/eidecker/oca8lernen/lastminute/AlternativeMain.java Normal file
View File

@@ -0,0 +1,15 @@
package org.eidecker.oca8lernen.lastminute;
public class AlternativeMain {
public static void main(String... args) {
System.out.println("Geht auch mit varargs");
for (String arg : args) {
System.out.println(arg);
}
}
}

35
src/org/eidecker/oca8lernen/lastminute/ArrayThings.java Normal file
View File

@@ -0,0 +1,35 @@
package org.eidecker.oca8lernen.lastminute;
import org.junit.jupiter.api.Test;
public class ArrayThings {
@Test
public void funWithArrays() {
int [][] a = {{1,2}, {1}};
System.out.println("Hallo");
String [] strings;
long [][] b = {{1,2}, {1}};
int[] ints;
long [] longs;
/* longs = (long[])ints;
a = (int[][])b;
if (a instanceof long[][])
if (strings instanceof String[])*/
}
@Test
public void someMoreFun() {
short[][][][] b2 = new short[2][3][2][2];
b2[1][1] = new short[4][4];
System.out.println(b2);
}
}

29
src/org/eidecker/oca8lernen/lastminute/Aufgabe10.java Normal file
View File

@@ -0,0 +1,29 @@
package org.eidecker.oca8lernen.lastminute;
public class Aufgabe10 {
}
class Ping extends Utils {
public static void main(String[] args) throws Exception {
Utils u = new Ping();
System.out.println(u.getInt(args[0]));
}
int getInt(String a) {
//return super.getInt(a);
return Integer.parseInt(a);
}
}
class Utils {
int getInt(String x) throws Exception {
return 7;
}
}
/*
interface Integer {
static int parseInt(String s) throws Exception {
return 4;
}
}*/

29
src/org/eidecker/oca8lernen/lastminute/EnumTesting.java Normal file
View File

@@ -0,0 +1,29 @@
package org.eidecker.oca8lernen.lastminute;
import org.junit.jupiter.api.Test;
import static org.eidecker.oca8lernen.lastminute.MILCH.VOLL;
enum MILCH {
VOLL(1);
private final String getValue() {
return values().toString();
}
MILCH(int n) {
}
}
public class EnumTesting {
private enum MILCH {VOLL, FETTARM, HALBFETT}
@Test
public void test() {
System.out.println(VOLL);
}
}

52
src/org/eidecker/oca8lernen/lastminute/InterfacesDefault.java Normal file
View File

@@ -0,0 +1,52 @@
package org.eidecker.oca8lernen.lastminute;
import org.junit.jupiter.api.Test;
public class InterfacesDefault implements I1, I2{
@Override
public void method() {
System.out.println("Aus InterfacesDefault");
//System.out.println(s2);
//I1.super.method();
//System.out.println(I1.s);
}
}
class Außerhalb {
@Test
public void someMethod() {
I1 i1 = new InterfacesDefault();
i1.method();
System.out.println(i1.s);
System.out.println(i1.s2);
InterfacesDefault i2 = new InterfacesDefault();
i2.method();
System.out.println(((I1) i2).s);
System.out.println(((I2) i2).s);
//System.out.println(i2.s);
}
}
interface I1 {
String s = "Hallo";
String s2 = "Noch einer";
default void method() {
System.out.println("Aus I2");
}
}
interface I2 {
String s = "Welt";
void method();
}

142
src/org/eidecker/oca8lernen/lastminute/Kleinigkeiten.java Normal file
View File

@@ -0,0 +1,142 @@
package org.eidecker.oca8lernen.lastminute;
import java.io.Serializable;
import java.time.LocalDate;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.concurrent.ThreadFactory;
import org.eidecker.oca8lernen.lastminute.hilfspackage.KlasseInEinemAnderenPackage;
import org.junit.jupiter.api.Test;
public class Kleinigkeiten {
// Methoden dürfen private final sein (final sinnlos)
private final String methode() {
LocalTime t1 = LocalTime.now();
LocalDate t2 = LocalDate.now();
// t1 instanceof t2;
return "Sinnlos";
}
@Test
public void testIfElseDerHoelle() {
if (false)
if (false) System.out.println("0");
else System.out.println("1");
// else System.out.println("2");
}
public void variabennamen (int i) {
// for (int i = i; )
// char c = 1.0;
}
@Test
public void removeFromArrayList() {
List<Integer> iList = new ArrayList<>();
iList.add(1);
iList.add(1);
iList.add(2);
iList.remove(new Integer(1));
}
@Test
public void testPackagePolymorphie() {
List<Oberklasse> oberklassen = Arrays.asList(new Oberklasse(), new KlasseInEinemAnderenPackage());
for (Oberklasse ober : oberklassen) {
ober.packageMethode();
if (ober instanceof KlasseInEinemAnderenPackage) {
KlasseInEinemAnderenPackage k = (KlasseInEinemAnderenPackage) ober;
// k.packageMethode();
}
}
}
@Test
public void testCast() {
Oberklasse oberklasse;
KlasseInEinemAnderenPackage unterklasse = new KlasseInEinemAnderenPackage();
oberklasse = (KlasseInEinemAnderenPackage) unterklasse;
}
@Test
public void wrapperSindImmutable() {
Integer I1 = 42;
Integer I2 = I1;
System.out.println(I1 == I2);
I1 += 1;
System.out.println(I1 == I2);
System.out.println(I1);
}
@Test
public void laengen() {
int[] a = {};
int i = a.length;
"Hallo".length();
new StringBuilder("Hallo").length();
new ArrayList<>().size();
}
@Test
public void incrementInFor() {
int j = 0;
for (j = 0; j < 6; System.out.println("Anweisung in Schleife" + j++)) {
System.out.println(j);
if (j == 3) break;
}
System.out.println("Ende: " + j);
}
@Test
public void schleifenvariablenSichtbarkeit() {
int[] ints = {1,2,3,4,5,6};
for (int i = 0; i < 10; i++) {
for (int i2 : ints) {
System.out.println(i + ": " + i2);
for (;i2<2;) {
System.out.println("Ganz innen " + i2);
break;
}
}
}
}
}
abstract class AbstrakteKlasse {
// private abstract verboten (auch sinnlos)
/* private */ abstract void sinnloseDefinition();
}
interface MySuperInterface extends Serializable, ThreadFactory {
default void m1() {
}
public abstract void my();
}
interface MyOtherSuperInterface {
default void m1() {
}
}

29
src/org/eidecker/oca8lernen/lastminute/Oberklasse.java Normal file
View File

@@ -0,0 +1,29 @@
package org.eidecker.oca8lernen.lastminute;
import org.eidecker.oca8lernen.lastminute.hilfspackage.PublicClassInEinemAnderenPackage;
import org.junit.jupiter.api.Test;
public class Oberklasse {
static protected String feldInOberklasse;
public final void publicMethode() {
System.out.println("Public");
}
private final void privateMethode() {
}
@Test
public void test() {
PublicClassInEinemAnderenPackage publicClassInEinemAnderenPackage = new PublicClassInEinemAnderenPackage();
publicClassInEinemAnderenPackage.publicMethode();
}
final void packageMethode() {
System.out.println("packageMethode in Oberklasse");
}
}

78
src/org/eidecker/oca8lernen/lastminute/StaticSichtbarkeit.java Normal file
View File

@@ -0,0 +1,78 @@
package org.eidecker.oca8lernen.lastminute;
import org.junit.jupiter.api.Test;
public class StaticSichtbarkeit {
@Test
public void testSichtbarkeit() {
Ober ober = new Unter();
ober.methode2(ober); // Ober, da zur Compilezeit ausgewählt (Bei Überladen würde nur die Signatur gewählt!)
System.out.println(ober.s);
String a = "";
a += "Welt";
// a -= "Welte";
String b = null;
System.out.println(b instanceof Object);
}
}
interface Interface {
static void methode2(Ober ober) {
System.out.println("Interface");
}
static void methode3(Ober ober) {
System.out.println("Interface");
}
}
class Ober implements Interface {
public static String s = "OberStatic";
private final void geheimeMethode() {
}
static void methode2(Ober ober) {
System.out.println("Ober");
}
void methode3(Ober ober) {
}
}
class Unter extends Ober {
public String s = "UnterNichtStatic";
public void geheimeMethode() {
}
static void methode2(Unter unter) {
System.out.println("Unter");
}
static void methode2(Ober ober) {
int €¥£ = 12;
System.out.println("Ober übergeben in Unter");
}
}

31
src/org/eidecker/oca8lernen/lastminute/castbaeume/Baum.java Normal file
View File

@@ -0,0 +1,31 @@
package org.eidecker.oca8lernen.lastminute.castbaeume;
import org.junit.jupiter.api.Test;
public class Baum {
@Test
public void testGraphCast() {
I i = new C();
I i2 = (C)new A();
I2 i3 = (C)new A();
I2 i4 = (C)new B();
}
}
/*
A
|
B-I
|
C-I2
*/
interface I {}
interface I2 {}
class A {}
class B extends A implements I {}
class C extends B implements I2 {}

35
src/org/eidecker/oca8lernen/lastminute/castbaeume/Graph.java Normal file
View File

@@ -0,0 +1,35 @@
package org.eidecker.oca8lernen.lastminute.castbaeume;
import org.junit.jupiter.api.Test;
public class Graph {
@Test
public void testSomeCasts() {
D f = new F();
E e;
e = (E)f;
}
@Test
public void testArrayAssignment() {
D[] ds = {};
E[] es = {};
es = (E[])ds;
ds = (D[])es;
}
}
/*
D
|-----
| |
E F
*/
class D {}
class E extends D {}
class F extends D {}

46
src/org/eidecker/oca8lernen/lastminute/hilfspackage/KlasseInEinemAnderenPackage.java Normal file
View File

@@ -0,0 +1,46 @@
package org.eidecker.oca8lernen.lastminute.hilfspackage;
import org.eidecker.oca8lernen.lastminute.Oberklasse;
import org.junit.jupiter.api.Test;
import java.io.IOException;
public class KlasseInEinemAnderenPackage extends Oberklasse {
protected String feldInOberklasse;
void privateMethode() {
try {
// anotherOne();
} catch (Exception e) {
}
}
void anotherOne() throws IOException {
}
/*void publicMethode() {
}*/
void packageMethode() {
System.out.println("packageMethode in KlasseInEinemAnderenPackage");
}
}
class AuchInEinemAnderenPackage {
public void publicMethode() {
System.out.println("Public AuchInEinemAnderenPackage");
}
@Test
public void testMe() {
KlasseInEinemAnderenPackage klasseInEinemAnderenPackage = new KlasseInEinemAnderenPackage();
klasseInEinemAnderenPackage.publicMethode();
}
}

30
src/org/eidecker/oca8lernen/lastminute/hilfspackage/PublicClassInEinemAnderenPackage.java Normal file
View File

@@ -0,0 +1,30 @@
package org.eidecker.oca8lernen.lastminute.hilfspackage;
public class PublicClassInEinemAnderenPackage extends AuchInEinemAnderenPackage {
public static void main(String[] args) {
"Hallo".concat("Test");
}
public static String s;
}
class NochEineSub extends PublicClassInEinemAnderenPackage {
public String s = "nicht statisch";
public static void main(String[] args) {
PublicClassInEinemAnderenPackage n = new NochEineSub();
System.out.println(n.s);
int k;
int j=k=3;
System.out.println(k);
System.out.println(j);
int i = Integer.MIN_VALUE;
int i2 = -i;
System.out.println(i);
System.out.println(i2);
}
}

30
src/org/eidecker/test/OptionalAPI.java Normal file
View File

@@ -0,0 +1,30 @@
package org.eidecker.test;
import java.util.Optional;
import org.junit.jupiter.api.Test;
/**
* @author seidecke.
*/
public class OptionalAPI {
@Test
public void testOptionalMapping() {
}
}
class DataHolder {
public Optional<String> value;
public DataHolder() {
value = Optional.empty();
}
}