Adding java 8 default examples

java-8/java-8-default/MyCar.java

@@ -0,0 +1,21 @@
+interface Car {
+    default void printWheelCount() {
+        System.out.println("4");
+    }
+
+    void printColor();
+}
+
+public class MyCar implements Car {
+
+    public static void main(String args[]) {
+        MyCar myCar = new MyCar();
+        myCar.printColor();
+        myCar.printWheelCount();
+    }
+
+    @Override
+    public void printColor() {
+        System.out.println("Red");
+    }
+}

java-8/java-8-default/MyVehicle.java

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+interface MyCar {
+    default public String getColor() {
+        return "red";
+    }
+}
+
+interface MyBike {
+    default public String getColor() {
+        return "blue";
+    }
+}
+
+public class MyVehicle implements MyCar, MyBike {
+
+    public static void main(String args[]) {
+        MyVehicle vehicle = new MyVehicle();
+        System.out.println(vehicle.getColor());
+    }
+
+
+    @Override
+    public String getColor() {
+        return MyCar.super.getColor();
+    }
+}

java-8/java-8-default/extend-interface-redeclare/MainClass.java

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+//Extending an interface that contains a default method
+//Example :  Redeclare the 'default' method
+
+interface FirstInterface {
+    default public String getName() {
+        return "Inside first interface";
+    }
+}
+
+interface SecondInterface extends FirstInterface {
+    public String getName();
+}
+
+public class MainClass implements SecondInterface {
+    public static void main(String args[]) {
+        MainClass mainClass = new MainClass();
+        System.out.println(mainClass.getName());
+    }
+
+    @Override
+    public String getName() {
+        return "Inside MainClass";
+    }
+}

java-8/java-8-default/extend-interface-redefine/MainClass.java

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+//Extending an interface that contains a default method
+//Example :  Redefine the 'default' method
+
+interface FirstInterface {
+    default public String getName() {
+        return "Inside first interface";
+    }
+}
+
+interface SecondInterface extends FirstInterface {
+    default public String getName() {
+        return "Inside second interface";
+    }
+}
+
+public class MainClass implements SecondInterface {
+    public static void main(String args[]) {
+        MainClass mainClass = new MainClass();
+        System.out.println(mainClass.getName());
+    }
+}

java-8/java-8-default/extend-interface-without-mention/MainClass.java

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+//Extending an interface that contains a default method
+//Example :  Don't mention anything about the 'default' method in the new interface.
+
+interface FirstInterface {
+    default public String getName() {
+        return "Inside first interface";
+    }
+}
+
+interface SecondInterface extends FirstInterface {
+}
+
+class MainClass implements SecondInterface {
+    public static void main(String args[]) {
+        MainClass mainClass = new MainClass();
+        System.out.println(mainClass.getName());
+    }
+}