interface A
{
 String test();
}

interface B extends interface A
{
  int test();
}

public Class AB implements B

{

   public String test()
   {

     }

   public int test()
   {
     }

}

we can not do with same method name. i tried it in jdk1.5,
not able to compile.

Sandeep,
Interface B gets the compilation error saying, "The return 
type is incompatible with A.test()"

Hence, the proposed solution is not correct.

yes , we cant implement like this.same as above answer.I 
tested it .

forget about implementing the interface
First of all can we can not have two similar method names 
only with return type as different.As per overloaded method 
concept it is not acceptable.So inorder to implement the 
interfaces we need to do like that which is not acceptable 
as per overloaded methods principle and hence compilation 
error.

Ramesh,
I am agree with the technical boudries which you have 
talked about. But this is a real problem and have to cope 
with it.
We can not change the interfaces at all, but there should 
be a way to achieve the goal, may be using inner class or 
so.

Chandan
test in A clashes with test in B;attempting to use 
incompatible type

interface A
{
 String test();
}

interface B
{
  int test();
}


public class AB implements B

{

  	A obj1 = new A(){
	  public String test()
		{
			return "";
		}
  };
   public int test()
   {
	   return 0;
   }
}

Menita you are absolutely correct!!

Interface A {
String test();
}

Interface B {
int test();
}

Class AB implements A,B
{
String test()
{
System.out.println("Test");
}
int test()
{ System.out.println("Test1");
}
}
Class Test
{
public static void main(String as[])
{
Interface i=null;

i=new AB();
i.test();
}
}

interface A {
String test();
}

interface B {
int test();
}

class AB implements A
{


public String test()
{ System.out.println("Test1 in AB");
	return "a";
}
}
class Test
{
public static void main(String as[])
{

AB  i = new AB();
B b = new B(){
	public int test()
	{
	System.out.println("Test");
	return 1;
	}
	};
i.test();
b.test();
}
}

public class AB implements A,B
{
  public static void main(String args[])
{

}
}

Class AB Implements A,B{
String test(){
SOS("----");
}
int test(){
SOS("--------");
}
}