Java添加事件的几种方式（转载了codebrother的文章，做了稍微的改动）：
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/** * 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(); }} |
