import java.lang.reflect.Method;

public class Test1 {

    public static void Temp(String ClassName, String MethodName, String args) throws Exception {
        
        Class c = Class.forName(ClassName);
        
        Method method = c.getDeclaredMethod(MethodName, String.class);
        
        Object obj = c.newInstance();
        
        method.invoke(obj, args);
    }

    public static void main(String args[]) throws Exception {

        Temp("Hello", "Demo", "nihao");

    }
}

class Hello {

    public void Demo(String args) {

        System.out.println("Hello" + args);

    }

}