Interface Sample Code

package com;

public interface TestingInterface extends Interface2{

static final int a =100;

public int calculateArea();

public void testing1();

}

package com;

public interface Interface2 {

 public void test();

}

package com;

public class TestingImpl implements TestingInterface{

public void test() {

System.out.println("Just testing this method");

}

public int calculateArea() {

int c = this.a*this.a;

System.out.println("The area calculated is "+c);

return c;

}

public void testing1() {

System.out.println("This method is from TestingInterface");

}

public  static void main(String args[])

{

TestingInterface obj = new TestingImpl();

obj.calculateArea();

obj.test();

obj.testing1();

}

}