Interfaces having methods of same signature but different return types

Question

I have two interfaces in two files:
public interface InterfaceA
int f();
public interface InterfaceB
void f();
Now I want to write a class that implements these two interfaces. Is it possible? If yes, could you please provide a code example?

Answer 1

The easiest thing would be to change one of the names! Another approach is to have views of the class implement one or both interfaces.
Both:
class C {
    private InterfaceA a = new InterfaceA() {
        public int f() {
            return 0;
    public InterfaceA asA() {
        return a;
    private InterfaceB b = new InterfaceB() {
        public void f() {
    public InterfaceB asB() {
        return b;
}One:
class B implements InterfaceB {
    private InterfaceA a = new InterfaceA() {
        public int f() {
            return 0;
    public InterfaceA asA() {
        return a;
    public void f() {
}