Java添加事件的四种方式

Java添加事件的几种方式（转载了codebrother的文章，做了稍微的改动）

 /**
  * Java事件监听处理——自身类实现ActionListener接口，作为事件监听器
  *
  * @author codebrother
  */
 class EventListener1 extends JFrame implements ActionListener {
     private JButton btBlue, btDialog;

     public EventListener1() {
         setTitle("Java GUI 事件监听处理");
         setBounds(100, 100, 500, 350);
         setLayout(new FlowLayout());
         btBlue = new JButton("蓝色");
         btDialog = new JButton("弹窗");

         // 将按钮添加事件监听器
         btBlue.addActionListener(this);
         btDialog.addActionListener(this);

         add(btBlue);
         add(btDialog);

         setVisible(true);
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     }
     // ***************************事件处理***************************
     @Override
     public void actionPerformed(ActionEvent e) {
         if (e.getSource() == btBlue) {
             Container c = getContentPane();
             c.setBackground(Color.BLUE);
          }
         else if (e.getSource() == btDialog) {
             JDialog dialog = new JDialog();
             dialog.setBounds(300, 200, 400, 300);
             dialog.setVisible(true);
         }
     }

 }

 /**
  * Java事件监听处理——内部类处理
  *
  * @author codebrother
  */

 class EventListener3 extends JFrame {
     private JButton btBlue, btDialog;

     // 构造方法
     public EventListener3() {
         setTitle("Java GUI 事件监听处理");
         setBounds(100, 100, 500, 350);
         setLayout(new FlowLayout());
         btBlue = new JButton("蓝色");
         btDialog = new JButton("弹窗");
         // 添加事件监听器对象(面向对象思想)
         btBlue.addActionListener(new ColorEventListener());
         btDialog.addActionListener(new DialogEventListener());

         add(btBlue);
         add(btDialog);
         setVisible(true);
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     }
     // 内部类ColorEventListener，实现ActionListener接口
     class ColorEventListener implements ActionListener {
         @Override
         public void actionPerformed(ActionEvent e) {
             Container c = getContentPane();
             c.setBackground(Color.BLUE);
          }
     }
     // 内部类DialogEventListener，实现ActionListener接口
     class DialogEventListener implements ActionListener {
         @Override
         public void actionPerformed(ActionEvent e) {
             JDialog dialog = new JDialog();
             dialog.setBounds(300, 200, 400, 300);
             dialog.setVisible(true);
         }
     }

 }

 /**
  * Java事件监听处理——匿名内部类处理
  *
  * @author codebrother
  */
 class EventListener2 extends JFrame {
     private JButton btBlue, btDialog;

     public EventListener2() {
         setTitle("Java GUI 事件监听处理");
         setBounds(100, 100, 500, 350);
         setLayout(new FlowLayout());

         btBlue = new JButton("蓝色");
         btDialog = new JButton("弹窗");

         // 添加事件监听器(此处即为匿名类)
         btBlue.addActionListener(new ActionListener() {
             // 事件处理
             @Override
             public void actionPerformed(ActionEvent e) {
                 Container c = getContentPane();
                 c.setBackground(Color.BLUE);
              }
         });

         // 并添加事件监听器
         btDialog.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
                 JDialog dialog = new JDialog();
                 dialog.setBounds(300, 200, 400, 300);
                 dialog.setVisible(true);
             }
         });

         add(btBlue);
         add(btDialog);
         setVisible(true);
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     }

 }

 /**
  * Java事件监听处理——外部类处理
  *
  * @author codebrother
  */
 class EventListener4 extends JFrame {
     private JButton btBlue, btDialog;

     public EventListener4() {
         setTitle("Java GUI 事件监听处理");
         setBounds(100, 100, 500, 350);
         setLayout(new FlowLayout());
         btBlue = new JButton("蓝色");
         btDialog = new JButton("弹窗");
         // 将按钮添加事件监听器
         btBlue.addActionListener(new ColorEventListener(this));
         btDialog.addActionListener(new DialogEventListener());

         add(btBlue);
         add(btDialog);
         setVisible(true);
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     }

 }
 // 外部类ColorEventListener，实现ActionListener接口
 class ColorEventListener implements ActionListener {
     private EventListener4 el;
     ColorEventListener(EventListener4 el) {
         this.el = el;
     }
     @Override
     public void actionPerformed(ActionEvent e) {
         Container c = el.getContentPane();
         c.setBackground(Color.BLUE);
      }
 }
 // 外部类DialogEventListener，实现ActionListener接口
 class DialogEventListener implements ActionListener {
     @Override
     public void actionPerformed(ActionEvent e) {
         JDialog dialog = new JDialog();
         dialog.setBounds(300, 200, 400, 300);
         dialog.setVisible(true);
     }
 }

 public class ActionListenerTest
 {
     public static void main(String args[])
     {
         new EventListener2();
     }
 }