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

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+package org.eidecker.oca8lernen.general;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class InterfaceWithFields implements T1, T2 {
+
+	public int getT1Value() {
+		return VALUE_T1;
+	}
+
+	public int getValue() {
+		return T2.VALUE;
+	}
+}
+
+interface T1 {
+	int VALUE = 99;
+	int VALUE_T1 = 1;
+}
+
+interface T2 {
+	int VALUE = 98;
+	int VALUE_T2 = 2;
+
+	default int getValue() {
+		return VALUE;
+	}
+}
+
+class Tester {
+
+	public void interfaceTest() {
+		InterfaceWithFields interfaceWithFields = new InterfaceWithFields();
+		assertEquals(99, ((T1)interfaceWithFields).VALUE);
+		assertEquals(98, ((T2)interfaceWithFields).VALUE);
+
+		assertEquals(1, interfaceWithFields.VALUE_T1);
+		assertEquals(2, interfaceWithFields.VALUE_T2);
+	}
+
+}