1 package javashiyan; 2 3 import java.awt.Color; 4 import java.awt.event.ActionEvent; 5 import java.awt.event.ActionListener; 6 7 import javax.swing.*; 8 9 public class Yanzhen extends JFrame10 {11 //定义成员变量12 private Mypanel mp;13 private JButton b;14 private JTextField txt;15 private ActionListener listener;16 17 public Yanzhen()18 {19 Realize();20 }21 public void Realize()22 {23 JFrame f=new JFrame("验证码");24 //实例化25 b=new JButton();26 b.addActionListener(listener);27 ActionEvent e;28 b.setIcon(new ImageIcon("D://button//刷新.jpg"));//载入图片29 b.setLocation(200,100);//设置位置30 b.setSize(32,32);//设置大小31 b.setVisible(true);//设置显示32 33 txt=new JTextField();34 txt.setSize(90,30);35 txt.setLocation(10,100);36 txt.setVisible(true);37 38 mp=new Mypanel();39 mp.setSize(100,30);40 mp.setLocation(100,100);41 42 JButton jb=new JButton();43 44 45 f.add(mp);46 f.add(b);47 f.add(txt);48 49 f.setLayout(null);50 f.setSize(400, 400);//设置界面大小51 f.getContentPane().setBackground(Color.white);//设置界面的背景颜色52 f.getContentPane().setVisible(true);53 f.setVisible(true);54 }55 56 57 58 public void actionPerformed(ActionEvent e) {59 // TODO Auto-generated method stub60 61 62 }63 }
1 package javashiyan; 2 3 import java.awt.*; 4 import java.util.*; 5 6 public class Mypanel extends Panel { 7 public void paint(Graphics g) 8 { 9 int height = 50;10 int width = 90;11 //验证码框背景颜色12 g.setColor(Color.white);13 //填充验证码背景14 g.fillRect(0, 0, width, height);15 g.setColor(Color.BLACK);16 g.drawRect(0, 0, width-1, height-1);17 Random r = new Random();18 for(int i = 0;i<100;i )19 {20 int x = r.nextInt(width)-1;21 int y = r.nextInt(height)-1;22 g.drawOval(x, y, 2, 2);//画干扰的圆点23 }24 for(int i=0;i<3;i )25 {26 int x1=r.nextInt(width)-1;27 int y1=r.nextInt(height)-1;28 int x2=r.nextInt(width)-1;29 int y2=r.nextInt(height)-1;30 g.drawLine(x1, y1, x2, y2);//画干扰的线段31 }32 33 g.setFont(new Font("黑体",Font.BOLD,20));//设置验证码字体以及大小34 g.setColor(Color.BLUE);//设置验证码字体颜色35 //生成随机验证码36 char[] tmp = ("0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ").toCharArray();37 StringBuilder sb = new StringBuilder();38 for(int i = 0;i<4;i )39 {40 int pos = r.nextInt(tmp.length);41 char c = tmp[pos];42 sb.append(c " ");43 }44 g.drawString(sb.toString(), 10, 15);//写入验证码45 }46 }
1 package javashiyan; 2 3 4 5 import java.util.Random; 6 7 public class main { 8 9 public static void main(String[] args) 10 { 11 Yanzhen dang=new Yanzhen();12 }13 14 }15
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