java8 lambda overloading example

gistfile1.java

public class Wewe {
    interface A {
        int run(int x);
    }

    interface B {
        int run(String x);
    }

    private void overloaded(A a)
    {
        a.run(1);
    }

    private void overloaded(B b)
    {
        b.run("1");
    }

    private void a()
    {
        overloaded(x -> {return 1;});
        // error: reference to overloaded is ambiguous, both method overloaded(A) in Wewe and method overloaded(B) in Wewe match
                   
        overloaded((A)x -> {return 1;});
        // OK
    }
}