example5_4.java.bak

书中的例题

/* 带有图标的按钮和标签 */
 import javax.swing.*;
 import java.awt.*;
 import java.awt.event.*;
 class Lbwindow extends JFrame implements ActionListener
 {
   JButton jbtn;
   JLabel jlb;
   Lbwindow()
   {  super("有图标的按钮和标签");
	  setSize(300,200);setVisible(true);
      Container con=getContentPane(); 
	  con.setLayout(new FlowLayout());
	  Icon icon1=new ImageIcon("s1.jpg");
      Icon icon2=new ImageIcon("s2.jpg");
      Icon icon3=new ImageIcon("s3.jpg");
	  jbtn=new JButton("我是按钮",icon1); 
	  jbtn.setRolloverIcon(icon2);
	  jlb=new JLabel("我是标签",icon3,SwingConstants.CENTER);
      jlb.setToolTipText("QQ头像");
      con.add(jbtn);
	  con.add(jlb);
	  jbtn.addActionListener(this);
      addWindowListener(new WindowAdapter()
        {public void windowClosing(WindowEvent e)
        {System.exit(0);}});
   }
  public void actionPerformed(ActionEvent e)
	{  
	  Frame intf=new Frame("弹出窗体");
      intf.setSize(60,60);
	  intf.setVisible(true);
   }
}
public class Example5_4
{  public static void main(String args[])
   { Lbwindow win=new Lbwindow();
     win.pack();
   }
}