Reflection Example in Java

import java.lang.reflect.*;

public class FBTest {

private interface FooI {
    public void foo();
    public void foo2();
}

private interface BarI {
    public void bar();
}

private class Base {}

private class Foo extends Base implements FooI {
    public void foo() {
        System.out.println("A");
    }

    public void foo2() {
        System.out.println("1");
    }
}

private class FooBar extends Base implements FooI, BarI {
    public void foo() {
        System.out.println("B");
    }

    public void foo2() {
        System.out.println("2");
    }

    public void bar() {
        System.out.println("foobar");
    }
}

private class Bar extends Base implements BarI {
    public void bar() {
        System.out.println("bar");
    }
}

Base[] arr = {new Foo(), new Bar(), new FooBar()};

void func(Class ctype, String methodName) {
    for (Base b: arr) {
        if (ctype.isInstance(b)) {
            try {
            Method m = ctype.getDeclaredMethod(methodName);
            m.invoke(b);
            } catch (Exception e) {
                System.out.println("Won't happen in example");
            }
        }
    }
};

public static void main(String[] args) {
    FBTest test = new FBTest();
    test.func(BarI.class, "bar");
    test.func(FooI.class, "foo2");
}
}