import java.lang.reflect.Method; public class Main { public static void main(String[] args) throws Exception { Class c = Class.forName("MyClass"); Method m = c.getDeclaredMethod("say", new Class[] { String.class, String.class }); Object i = c.newInstance(); Object r = m.invoke(i, new Object[] { "Hello","World" }); } } class MyClass { public void say(String s1, String s2) { System.out.println(s1 + " " + s2); } }