2020.10.4

输入验证码

import javax.swing.Box;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Addition {
   public static void main( String args[] )
   {
       String name[]=new String[5];
       String mima[]=new String[5];
       name[0]="jiatan";
       mima[0]="3580766";
       Object[] tips= {"登录(log on)
","快速注册(register)
"};
             String result = "";
             for(int i = 0 ; i < 4 ; i ++)
             {
                 int x=(int)(Math.random()*2+1);
                 int intVal=0;
                 switch(x) {
                 case 1:
                     intVal = (int)(Math.random()*26+97);
                     break;
                 case 2:
                      intVal = (int)(Math.random()*10+48);
                     break;
                 case 3:
                     intVal =  (int)(Math.random()*26+65);
                 }
                 result = result + (char)intVal;
             }
             JTextField xField = new JTextField(5);
             JTextField yField = new JTextField(5);
             JTextField zField = new JTextField(5);
            JPanel myPanel = new JPanel();
           myPanel.add(new JLabel("用户名:"));
           myPanel.add(xField);
           myPanel.add(Box.createHorizontalStrut(10)); // a spacer
           myPanel.add(new JLabel("密码:"));
           myPanel.add(yField);
           myPanel.add(new JLabel("验证码:"));
           myPanel.add(zField);
           myPanel.add(new JLabel("验证码:"+result));
           JOptionPane.showOptionDialog(null, myPanel, "登录界面", JOptionPane.OK_CANCEL_OPTION,JOptionPane.QUESTION_MESSAGE,null,tips,tips[0]);
           if(xField.getText().equals(name[0])&&yField.getText().equals(mima[0])&&zField.getText().equals(result)) {
               JOptionPane.showMessageDialog(null, "登录成功，用户"+name[0],"登录界面",JOptionPane.INFORMATION_MESSAGE);
           }
           else
               JOptionPane.showMessageDialog(null, "登录失败","登录界面",JOptionPane.ERROR_MESSAGE);
       System.exit( 0 ); 
}
}