package Annotation_14;

import javax.swing.*;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.lang.annotation.ElementType;

import java.lang.annotation.Retention;

import java.lang.annotation.RetentionPolicy;

import java.lang.annotation.Target;

@Target(ElementType.FIELD)

@Retention(RetentionPolicy.RUNTIME)

@interface ActionListenerFor {

Class<? extends ActionListener> listener();

}

class OkListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

JOptionPane.showMessageDialog(null,"单击了确认按钮");

}

}

class CancelListener implements ActionListener {

public void actionPerformed(ActionEvent e) {

JOptionPane.showMessageDialog(null,"单击了取消按钮");

}

}

public class AnnotationTest {

private JFrame mainWin = new JFrame("使用注解绑定监听器");

@ActionListenerFor(listener = OkListener.class)

private JButton ok = new JButton("确定");

@ActionListenerFor(listener = CancelListener.class)

private JButton cancel = new JButton("取消");

public void init() {

JPanel jp = new JPanel();

jp.add(ok);

jp.add(cancel);

mainWin.add(jp);

ActionListenerInstaller.processAnnotations(this);

mainWin.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

mainWin.pack();

mainWin.setVisible(true);

}

public static void main(String[] args) {

new AnnotationTest().init();

}

}