事件监听

package 事件监听;
import java.awt.*;
import java.awt.event.*;

public  class Frame2 extends Frame implements ActionListener{  private Button button1;  public Frame2()  {   super("我的信息");       this.setSize(250,200);//设计组件的尺寸       this.setLocation(800,600);//设计组件显示的位置       this.setBackground(Color.blue);//设计背景颜色       this.setLayout(new FlowLayout());//设计容器为流布局，居中       this.add(new Label("姓名"));       this.add(new TextField("浩杰”,20));       this.add(new Label("性别"));       this.add(new TextField("男",20));       this.add(new Label("民族"));       this.add(new TextField("藏",20));       this.add(new Label("年龄"));       this.add(new TextField("23",20));       button1=new Button("确认");       this.add(button1);       button1.addActionListener(this);       this.addWindowListener(new WinClose());       this.setVisible(true);  }  public void actionPerformed(ActionEvent ev)  {   if(ev.getSource()==button1)   {    System.out.print("welcome");   }  }  public static void main(String arg[])  {   new Frame2();  }      class WinClose implements WindowListener  {   public void windowClosing(WindowEvent ev)   {    System.exit(0);   }   public void windowOpened(WindowEvent ev) {}   public void windowActivated(WindowEvent ev) {}   public void windowDeactivated(WindowEvent ev) {}   public void windowClose(WindowEvent ev) {}   public void windowIconified(WindowEvent ev) {}   public void windowDeiconified(WindowEvent ev) {}   @Override   public void windowClosed(WindowEvent arg0) {    // TODO 自动生成的方法存根       }  }   }