public class Robot {

    private String name;

    public void sayHi(String helloSentence){

        System.out.println(helloSentence + " " + name);

    }

    private String throwHello(String tag){

        return "Hello " + tag;

    }

    static {

        System.out.println("Hello Robot");

    }

}

public class ReflectSample {

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

        Class rc = Class.forName("com.interview.javabasic.reflect.Robot");

        Robot r = (Robot) rc.newInstance();

        System.out.println("Class name is " + rc.getName());

        //调用私有方法rc.getDeclaredMethod

        Method getHello = rc.getDeclaredMethod("throwHello", String.class);

        getHello.setAccessible(true);

        Object str = getHello.invoke(r, "Bob");

        System.out.println("getHello result is " + str);

        //调用PUBLIC方法rc.getMethod

        Method sayHi = rc.getMethod("sayHi", String.class);

        sayHi.invoke(r, "Welcome");

        //设置私有属性

        Field name = rc.getDeclaredField("name");

        name.setAccessible(true);

        name.set(r, "Alice");

        sayHi.invoke(r, "Welcome");

    }

}