1 package nanshen;

  2

  3 import java.awt.Container;

  4 import java.awt.event.ActionEvent;

  5 import java.awt.event.ActionListener;

  6 import java.util.Random;

  7

  8 import javax.swing.JButton;

  9 import javax.swing.JFrame;

 10 import javax.swing.JLabel;

 11 import javax.swing.JOptionPane;

 12 import javax.swing.JPanel;

 13 import javax.swing.JPasswordField;

 14 import javax.swing.JTextField;

 15

 16 public class test10 {

 17     public static void main(String[] args) {

 18         JFrame jf=new JFrame();

 19         JButton jb=new JButton("登录");

 20         /*

 21          * JLabel 用于显示一个标签信息

 22          *

 23          */

 24         JLabel idname=new JLabel("用户名"); //实例化对象

 25         JLabel pastword=new JLabel("密    码");

 26         JLabel yzword=new JLabel("验证码");

 27         /*

 28          * 定义数组生成验证码随机数

 29          *

 30          */

 31         int[] random=new int[6];

 32

 33         Random r=new Random(System.currentTimeMillis());

 34

 35         for(int i=0;i<6;i++)

 36         {

 37             random[i]=r.nextInt(10)%9+1;

 38         }

 39         /*

 40          * 把6位随机数存储为字符串形式

 41          *

 42          */

 43         String str="";

 44         for(int i=0;i<6;i++)

 45         {

 46             str=str+random[i];

 47         }

 48

 49         final String Str=str;

 50

 51         JLabel yzWord=new JLabel(str);

 52

 53         JTextField idtxt=new JTextField(15);//实例化用户名文本框

 54

 55         JPasswordField wordtxt=new JPasswordField(15);//实例化密码框

 56

 57         JTextField yzwordtxt=new JTextField(15);

 58

 59         wordtxt.setEchoChar('*');//将输入密码框中的密码以*显示出来

 60

 61         jf.setBounds(450,350,350,250);

 62

 63         jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

 64         Container c=jf.getContentPane();

 65

 66         c.setLayout(null);

 67         c.add(jb);

 68         c.add(idname);

 69         c.add(idtxt);

 70         c.add(pastword);

 71         c.add(wordtxt);

 72         c.add(yzword);

 73         c.add(yzwordtxt);

 74         c.add(yzWord);

 75

 76         idname.setBounds(10,40,50,18);

 77         pastword.setBounds(10,80,50,18);

 78         yzword.setBounds(10,120,50,18); //标签“验证码”

 79         yzWord.setBounds(60,160,80,18); //生成的随机数验证码

 80

 81

 82         idtxt.setBounds(60,40,200,18);

 83         wordtxt.setBounds(60,80,200,18);

 84         yzwordtxt.setBounds(60,120,200,18);

 85

 86         jb.setBounds(200,150,60,40);

 87

 88         jb.addActionListener(new ActionListener() {

 89

 90             public void actionPerformed(ActionEvent arg0)

 91             {

 92                 if(idtxt.getText().trim().equals("YCW000429")

 93                         &&new String(wordtxt.getPassword()).equals("123456")

 94                         &&yzwordtxt.getText().trim().equals(Str))

 95                 {

 96                     JOptionPane.showMessageDialog(null,"登录成功");

 97                 }

 98                 if(yzwordtxt.getText().trim().equals(Str)

 99                         &&(!idtxt.getText().trim().equals("YCW000429")

100                         ||!(new String(wordtxt.getPassword()).equals("123456"))))

101                 {

102                     JOptionPane.showMessageDialog(null,"用户名或密码错误");

103                 }

104                 if(idtxt.getText().trim().equals("YCW000429")

105                         &&new String(wordtxt.getPassword()).equals("123456")

106                         &&!yzwordtxt.getText().trim().equals(Str))

107                 {

108                     JOptionPane.showMessageDialog(null,"验证码错误");

109                 }

110             }

111         });

112         jf.setVisible(true);

113     }

114 }