Java Swing 用户登录界面

来源：互联网发布：登陆艇升级数据编辑：程序博客网时间：2024/05/18 01:20
package JAVA_1;import java.awt.BorderLayout;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JPasswordField;import javax.swing.JTextField;import javax.swing.SwingConstants;public class Login extends JFrame implements ActionListener{JButton login = new JButton("登录");JButton exit = new JButton("退出");JLabel  name = new JLabel("用户名：");JLabel password = new JLabel("密码："); JTextField JName = new JTextField(10); //明文账号输入JPasswordField JPassword = new JPasswordField(10); // 非明文密码输入；public Login() {JPanel jp = new JPanel();jp.setLayout(new GridLayout(3,2));  //3行2列的面板jp（网格布局）name.setHorizontalAlignment(SwingConstants.RIGHT);  //设置该组件的对齐方式为向右对齐password.setHorizontalAlignment(SwingConstants.RIGHT);jp.add(name);   //将内容加到面板jp上jp.add(JName);  jp.add(password);jp.add(JPassword);  jp.add(login);jp.add(exit);login.addActionListener(this); //登录增加事件监听exit.addActionListener(this);//退出增加事件监听this.add(jp,BorderLayout.CENTER);//将整块面板定义在中间this.setTitle("登录窗口");this.setLocation(500,300);//设置初始位置this.pack();  //表示随着面板自动调整大小this.setVisible(true);this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);}public void actionPerformed(ActionEvent e)  // 对时间进行处理{if(e.getSource() == exit){int i = JOptionPane.showConfirmDialog(null,"确认要退出吗？", "确认", JOptionPane.YES_NO_OPTION);// 显示选择对话框if(i == JOptionPane.YES_OPTION);System.exit(0);}else{if(JName.getText().equals("admin")&& String.valueOf(JPassword.getPassword()).equals("admin")){JOptionPane.showMessageDialog(null, "登录成功，欢迎到来！");//显示信息提示框System.exit(0);}else {JOptionPane.showMessageDialog(null, "用户或密码错误！请从新登录！");//显示信息提示框JName.setText(""); JPassword.setText("");}}}public static void main(String[] args){JFrame.setDefaultLookAndFeelDecorated(true);new Login();}}
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