TypeCheck.java

import java.lang.reflect.Method;

public class TypeCheck {
    public static void main(String args[]) throws Exception {
        A o = new A();
        Method f = A.class.getMethod("f", int.class);
        f.invoke(o, 1.0);
    }
}

class A {
    public void f(int a) {
        System.out.println("" + a);
    }
}