Java-Programs/interfaceExamples/IntefaceRules.java at master · bcsangeetha/Java-Programs · GitHub

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package interfaceExamples;

public class IntefaceRules {

}

interface ExampleInterface1 {

// By default - public static final. No other modifier allowed

// value1,value2,value3,value4 all are - public static final

int value1 = 10;

public int value2 = 15;

public static int value3 = 20;

public static final int value4 = 25;

// private int value5 = 10;//COMPILER ERROR

// By default - public abstract. No other modifier allowed

void method1();// method1 is public and abstract

// private void method6();//COMPILER ERROR!

public static void m1() {//And we can provide definition for

//static method (From java 8 it's possible)

System.out.println("Static method");

}

//Interface can have a default definition of method.

//NEW FEATURE

default void method5() {

System.out.println("Method5");

}

interface ExampleInterface2 {

void method2();

}

interface test{

void te();

}

// An interface can extend another interface

// Class implementing SubInterface1 should

// implement method3 and method1(from ExampleInterface1)

interface SubInterface1 extends ExampleInterface1 {

void method3();

}

* //COMPILE ERROR IF UnCommented //Interface cannot extend a Class interface

* SubInterface2 extends InterfaceRules{ void method3(); }

/* A Class can implement multiple interfaces */

class SampleImpl implements ExampleInterface1, ExampleInterface2 {

* A class should implement all the methods in an interface. If either of

* method1 or method2 is commented, it would result in compilation error.

public void method2() {

System.out.println("Sample Implementation for Method2");

}

public void method1() {

System.out.println("Sample Implementation for Method1");

}

Java-Programs/interfaceExamples/IntefaceRules.java at master · bcsangeetha/Java-Programs · GitHub

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