Java添加事件监听的四种方法代码实例

/**

 * 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();

  }

}