java实现GUI登录界面

JavaBuilt 2017-07-19 08:57:44

package cn.lys.main; //包名，截取代码使用需删除

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Arrays;
public class Components extends JFrame{
/**
*
*/
private JPanel jp1,jp2,jp3; //定义面板
private JLabel User,Password; //定义用户名和密码标签
private JTextField user; //定义文本类型的用户名
private JPasswordField passwordField; //定义密码
private JButton jb1,jb2,jb3; //定义三个按钮
public Components(){

//创建相应对象
jp1 = new JPanel(new BorderLayout()); //布局
jp2 = new JPanel(new GridLayout(3,3));
jp3 = new JPanel();

User = new JLabel("用户名：");
Password = new JLabel("密码：");

user = new JTextField();
passwordField = new JPasswordField();

jb1 = new JButton("登录");
jb2 = new JButton("注册");
jb3 = new JButton("取消");
//添加相应组件
jp3.add(jb1);
jp3.add(jb2);
jp3.add(jb3);

jp2.add(User);
jp2.add(Password);
jp2.add(user);
jp2.add(passwordField);
jp1.add(jp2);
jp1.add(jp3,"South");
this.add(jp1);
int width = Toolkit.getDefaultToolkit().getScreenSize().width;
int height = Toolkit.getDefaultToolkit().getScreenSize().height;

this.setLocation(width/2-200, height/2-150);
//添加监听器，按按钮会弹出对话框
jb1.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
String s1=user.getText();
char[] s2=passwordField.getPassword();
// System.out.println(s1);
// System.out.println(s2);
char[] pwd={'a','b','c','1','2','3'}; //密码为abc123

Component frame = null;
//登录用户名为：九月长安
if (s1.equals("九月长安") && Arrays.equals(s2,pwd)) {
// 若正确登录则提示登录成功
JOptionPane.showMessageDialog(frame,
"登录成功！","温馨提示",JOptionPane.INFORMATION_MESSAGE);

}
else {
JOptionPane.showMessageDialog(frame,"用户名错误!!","Warning",JOptionPane.WARNING_MESSAGE);
}
Arrays.fill(s2,'0');
}
});

jb2.addActionListener(new ActionListener(){

@Override
public void actionPerformed(ActionEvent e){
Component frame = null;
JOptionPane.showMessageDialog(frame,
"正在跳转...","温馨提示",JOptionPane.INFORMATION_MESSAGE);

//System.out.println("正在跳转...");
}

});
jb3.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});

this.setTitle("Java-彩票抽奖系统"); //标题
this.setSize(400, 150); //窗口大小
this.setVisible(true); //窗口可见

this.setDefaultCloseOperation(DISPOSE_ON_CLOSE); //关闭窗口按钮右上角的X

}

}

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