23.9.15

今天完成了java对话框的验证码设计

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.util.Random;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Main {

    public static void main(String[] args) {
        char ain[] = {'a', 'b', 'c', 'd', 'e', 'A', 'R', 'O', 'P', '2', '3', '4', '5', '6', '7'};
        StringBuilder P = new StringBuilder();
        Random random = new Random();
        StringBuilder u = new StringBuilder();
        for (int i = 0; i < 4; i++) {
            int r = random.nextInt(0, 14);
            u.append(ain[r]);
        }
    JFrame frame=new JFrame("登入系统");
        frame.setSize(400, 300);
        frame.setLocationRelativeTo(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLayout(null);
        JLabel user=new JLabel("账户：");
        user.setBounds(10, 10, 100, 30);
        frame.add(user);
     JTextField userword =new JTextField();
     userword.setBounds(50, 10, 100, 30);
     frame.add(userword);
        JLabel pass=new JLabel("密码：");
        pass.setBounds(10, 50, 100, 30);
        frame.add(pass);
        JTextField password =new JTextField();
        password.setBounds(50, 50, 100, 30);
        frame.add(password);
        JLabel o=new JLabel("验证码"+"   "+u.toString());
        o.setBounds(10, 90, 100, 30);
        frame.add(o);
        JTextField y=new JTextField();
        y.setBounds(50,120,100,30);
        frame.add(y);

        JButton b1=new JButton("登入");
        b1.setBounds(10, 200, 100, 30);
        frame.add(b1);
        b1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String userInput = userword.getText();
                String passwordInput = password.getText();
                String yInput = y.getText();
                String a = "123456";
                String b = "123456";
                if (userInput.isEmpty() || passwordInput.isEmpty()) {
                    JOptionPane.showMessageDialog(null, "请输入账号和密码");
                } else if (userInput.equals(a) && passwordInput.equals(b)) {
                    JOptionPane.showMessageDialog(null, "登入成功");
                } else {
                    JOptionPane.showMessageDialog(null, "输入错误");
                }
            }
        });
frame.setVisible(true);
        }
    }