passframe1.java

非常好的JAVA学习资料

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.event.*;

public class PassFrame1 extends JFrame {
  JPanel cp=new JPanel();
  JPasswordField jpf=new JPasswordField(30);
  JLabel l=new JLabel();
  JButton jb1=new JButton("ok     ",new ImageIcon("face5.gif"));
  JButton jb2=new JButton("reinput",new ImageIcon("face4.gif"));
  JButton jb3=new JButton("cancel ",new ImageIcon("face3.gif"));
  Jb1Listener jb1l=new Jb1Listener();
  Jb2Listener jb2l=new Jb2Listener();
  Jb3Listener jb3l=new Jb3Listener();

  public PassFrame1()
  {
   cp=(JPanel)this.getContentPane();
   cp.setLayout(new FlowLayout());
   setTitle("try to use password");
   setSize(200,300);

   jpf.setEchoChar('#');
   l.setIcon(new ImageIcon("face.gif"));
   l.setText("please input password:");
   jb1.addActionListener(jb1l);
   jb2.addActionListener(jb2l);
   jb3.addActionListener(jb3l);
   cp.add(l);
   cp.add(jpf);
   cp.add(jb1);
   cp.add(jb2);
   cp.add(jb3);
  }

  protected void  processWindowEvent(WindowEvent e)
  {
   if(e.getID()==WindowEvent.WINDOW_CLOSING)
   {
    System.exit(0);
    }
   }

  public static void main(String[] args)
  {
    PassFrame1 passFrame1 = new PassFrame1();
    passFrame1.setVisible(true);
   }

   class  Jb1Listener implements ActionListener
   {
    public void actionPerformed(ActionEvent e)
    {
     jb1_actionperformed(e);
     }
    }

    void jb1_actionperformed(ActionEvent e)
    {
     String pw=new String(jpf.getPassword());

     if(pw.equals("thank"))
      {
       JOptionPane.showMessageDialog(null,"welcome");
       }
     else
       {
        JOptionPane.showMessageDialog(null,"wrong password");
        }
      }

  class  Jb2Listener implements ActionListener
  {
    public void actionPerformed(ActionEvent e)
    {
     jb2_actionperformed(e);
     }
   }

  void jb2_actionperformed(ActionEvent e)
  {
    jpf.setText("");
  }

  class  Jb3Listener implements ActionListener
  {
    public void actionPerformed(ActionEvent e)
    {
     jb3_actionperformed(e);
     }
   }

  void jb3_actionperformed(ActionEvent e)
  {
    System.exit(0);
  }
}