java常见事件响应方法实例汇总

import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*; 
 
//声明 类时，添加“implements ActionListener”实现监听的接口，如果要对多种监听方式进行监听，则用逗号间隔开 
// 比如“implements ActionListener,KeyListener” 
 
class ButtonListener extends JFrame implements ActionListener{ 
 JButton ok, cancel,exit; //创建接受响应的组建，就是三个按钮 
 public ButtonListener(String title){ 
 super(title); 
 this.setLayout(new FlowLayout()); 
 ok = new JButton("确定"); 
 cancel = new JButton("返回"); 
 exit = new JButton("退出"); 
//下面三个语句 为按钮分别 注册监听器 
 ok.addActionListener(this);   
 cancel.addActionListener(this); 
 exit.addActionListener(this); 
 getContentPane().add(ok); 
 getContentPane().add(cancel); 
 getContentPane().add(exit); 
} 
 
//完成 事件触发时的事件处理 
 public void actionPerformed(ActionEvent e){ 
   if(e.getSource()==ok) 
    System.out.println("确定"); 
   if(e.getSource()==cancel) 
    System.out.println("返回"); 
   if(e.getSource()==exit) 
     System.exit(0);; 
 } 
 
 public static void main(String args[]) { 
   ButtonListener pd=new ButtonListener("ActionEvent Demo"); 
   pd.setSize(250,100); 
  pd.setVisible(true); 
 } 
} 
 

import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*; 
 
class ButtonListener1 extends JFrame { //这里没有实现监听 
 JButton ok, cancel,exit; 
 public ButtonListener1(String title){ 
  super(title); 
  this.setLayout(new FlowLayout()); 
  ok = new JButton("确定"); 
  cancel = new JButton("返回"); 
  exit = new JButton("退出"); 
  ok.addActionListener(new MyListener()); 
  cancel.addActionListener(new MyListener());; 
  exit.addActionListener(new MyListener());; 
  getContentPane().add(ok); 
  getContentPane().add(cancel); 
  getContentPane().add(exit); 
 } 
 
 public static void main(String args[]) { 
   ButtonListener pd=new ButtonListener("ActionEvent Demo"); 
   pd.setSize(250,100); 
  pd.setVisible(true); 
 } 
} 
  //监听动作事件 
class MyListener implements ActionListener{ 
  public void actionPerformed(ActionEvent e){ 
   if(e.getActionCommand()=="确定") 
    System.out.println("确定"); 
   if(e.getActionCommand()=="返回") 
    System.out.println("返回"); 
   if(e.getActionCommand()=="退出") 
     System.exit(0);; 
  } 
}

import java.awt.BorderLayout; 
import java.awt.event.ActionEvent; 
import javax.swing.AbstractAction; 
import javax.swing.Action; 
import javax.swing.JFrame; 
import javax.swing.JMenu; 
import javax.swing.JMenuBar; 
import javax.swing.JMenuItem; 
import javax.swing.JOptionPane; 
 
//此类继承AbstractAction，必须实现actionPerformed（）方法。 
class AbstractEvent extends AbstractAction{ 
  //private static final long serialVersionUID = 1L; 
  AbstractEvent(){ 
  } 
  public void actionPerformed(ActionEvent e){ 
    //弹出确认对话框 
    if (e.getActionCommand()=="open"){ 
      JOptionPane.showMessageDialog(null, "打开"); 
    }else if (e.getActionCommand()=="close"){ 
      JOptionPane.showMessageDialog(null, "关闭"); 
    }else if (e.getActionCommand()=="run"){ 
      JOptionPane.showMessageDialog(null, "运行"); 
    }else if (e.getActionCommand()=="stop"){ 
      JOptionPane.showMessageDialog(null, "停止"); 
    } 
  } 
} 
public class TestAbstractEvent { 
  private static JMenuBar menubar; 
  private static JFrame frame; 
   
  //指定MenuEvent的具体处理程序是AbstractEvent类完成的。 
  final Action MenuEvent=new AbstractEvent(); 
  public TestAbstractEvent(){ 
    frame=new JFrame("menu"); 
    frame.getContentPane().setLayout(new BorderLayout()); 
    menubar=new JMenuBar(); 
    JMenu menuFile=new JMenu("file"); 
     
    //实例化一个菜单项，并添加监听openAction， 
    JMenuItem menuItemopen=new JMenuItem("open"); 
    menuItemopen.addActionListener(MenuEvent); 
    JMenuItem menuItemclose=new JMenuItem("close"); 
    menuItemclose.addActionListener(MenuEvent); 
    menuFile.add(menuItemopen); 
    menuFile.add(menuItemclose); 
    JMenu menuTool=new JMenu("tool"); 
    JMenuItem menuItemrun=new JMenuItem("run"); 
    menuItemrun.addActionListener(MenuEvent); 
    JMenuItem menuItemstop=new JMenuItem("stop"); 
    menuItemstop.addActionListener(MenuEvent); 
    menuTool.add(menuItemrun); 
    menuTool.add(menuItemstop); 
    menubar.add(menuFile); 
    menubar.add(menuTool); 
    menubar.setVisible(true); 
    frame.add(menubar,BorderLayout.NORTH); 
    frame.setSize(400,200); 
    frame.setVisible(true); 
  } 
  public static void main(String[] args){ 
    new TestAbstractEvent(); 
  } 
} 

import java.awt.BorderLayout; 
import java.awt.event.ActionEvent; 
import javax.swing.*; 
 
class ViewAction extends AbstractAction{ 
  private String ActionName=""; 
  //private JFrame frame=null; 
  private Action action=null; 
  public ViewAction(){ 
  } 
  public ViewAction(String ActionName){ 
    this.ActionName=ActionName; 
    //this.frame=frame; 
  } 
  @Override 
  public void actionPerformed(ActionEvent e) { 
    Action action=getAction(this.ActionName); 
    action.execute(); 
  } 
  private Action getAction(String ActionName){ 
    try{ 
      if (this.action==null){ 
        Action action=(Action)Class.forName(ActionName).newInstance(); 
        this.action=action; 
      } 
      return this.action; 
    }catch(Exception e){ 
    return null; 
    } 
  } 
} 
public class TestAE extends JFrame { 
  public JToolBar bar=new JToolBar(); 
  String buttonName[]={"b1","b2","b3"}; 
  public TestAE(){ 
    super("事件"); 
    for (int i=0;i<buttonName.length;i++){ 
      ViewAction action=new ViewAction(buttonName[i]); 
      JButton button=new JButton(buttonName[i]); 
      button.addActionListener(action); 
      bar.add(button); 
    } 
    this.getContentPane().add(bar,BorderLayout.NORTH); 
    this.setSize(300, 200); 
    this.setLocationRelativeTo(null); 
    this.setVisible(true); 
  } 
  public static void main(String [] args){ 
    new TestAE(); 
  } 
} 
interface Action{ 
  void execute(); 
} 
class b1 implements Action{ 
  public void execute(){ 
    JOptionPane.showMessageDialog(null, "单击了 b1"); 
  } 
} 
class b2 implements Action{ 
  public void execute(){ 
    JOptionPane.showMessageDialog(null, "单击了 b2"); 
  } 
} 
class b3 implements Action{ 
  public void execute(){ 
    JOptionPane.showMessageDialog(null, "单击了 b3"); 
  } 
}