Gemeinsames Lernen

src/org/eidecker/oca8lernen/general/HeaderList.java

@@ -0,0 +1,9 @@
+package org.eidecker.oca8lernen.general;
+
+import java.util.ArrayList;
+
+/**
+ * @author seidecke.
+ */
+public class HeaderList extends ArrayList {
+}

src/org/eidecker/oca8lernen/general/LabelContinueUndBreak.java

@@ -1,6 +1,5 @@
 package org.eidecker.oca8lernen.general;
 
-import com.sun.xml.internal.ws.api.model.wsdl.WSDLOutput;
 import org.junit.jupiter.api.Test;
 
 public class LabelContinueUndBreak {

src/org/eidecker/oca8lernen/general/PrimitiveUndWrapperTest.java

@@ -1,17 +1,27 @@
 package org.eidecker.oca8lernen.general;
 
-import com.sun.xml.internal.ws.api.message.HeaderList;
-import java.io.PrintStream;
-import java.util.ArrayList;
-import java.util.List;
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import java.util.ArrayList;
+import org.junit.jupiter.api.Test;
+
 
 public class PrimitiveUndWrapperTest {
 
+	@Test
+	public void zuweisungWertebereich() {
+
+		char c = (char) 1L;
+
+		short sh = Short.MAX_VALUE;
+		char s = sh;
+
+		"Hallo".concat()
+
+		System.out.println(s);
+	}
+
 	@Test
 	public void wrapperEquals() {
 
@@ -78,9 +88,20 @@ public class PrimitiveUndWrapperTest {
 		System.out.println(4 + 3 + "" + 3 + 5);
 		"asdadada".length();
 	}
-}
 
 
+	@Test
+	public void definition() {
+		Double d = 3.14;
+		// Float f = 3.14; geht nicht, da double angenommen
+
+		// float smallF = 3.14; geht nicht, da double angenommen
+		double smallD = 3.14;
+
+
+	}
+}
+
 
 
 class Ober {

src/org/eidecker/oca8lernen/general/StringBuilderAndConcat.java

@@ -0,0 +1,27 @@
+package org.eidecker.oca8lernen.general;
+
+import org.junit.jupiter.api.Test;
+
+/**
+ * @author seidecke.
+ */
+public class StringBuilderAndConcat {
+
+	@Test
+	public void testStringBuilderConcat() {
+
+		System.out.println(new StringBuilder("Hallo ") + "Welt");
+
+		System.out.println(new StringBuilder("Hallo ") + "Welt" + true);
+
+		System.out.println(true + "Welt");
+
+		System.out.println(new StringBuilder("Hallo ") + new StringBuilder("Welt").toString());
+
+		// Compilefehler
+		// System.out.println(1 + true);
+		// System.out.println(new StringBuilder("Hallo ") + new StringBuilder("Welt") + "Welt");
+
+	}
+
+}