import java.awt.*; import javax.swing.*; import java.awt.event.*; public class Login extends JFrame { JTextField usernameTextField; JPasswordField pwdPasswordField; JButton submint,close; JLabel usenameLabel,pwdLabel; public Login(){ usenameLabel=new JLabel("用户名:",JLabel.RIGHT); pwdLabel=new JLabel("密码:",JLabel.RIGHT); usernameTextField=new JTextField(10); pwdPasswordField=new JPasswordField(10); submint=new JButton("登录"); close=new JButton("关闭"); setLayout(new GridLayout(3,2)); add(usenameLabel); add(usernameTextField); add(pwdLabel); add(pwdPasswordField); add(submint); add(close); setDefaultCloseOperation(EXIT_ON_CLOSE); setSize(260,150); setLocationRelativeTo(null); setVisible(true); } public static void main(String[] args){ Login login=new Login(); } }