Java登录界面

package test;

import java.awt.BorderLayout;
import java.awt.FlowLayout;
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.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.border.EmptyBorder;

/**
 * Java登录界面
 * @author JavaApha
 * 2013年1月25日15:41:38
 */
public class LoginFrame extends JFrame {

  private static final long serialVersionUID = 1L;
  JTextField jtf1;
  JTextField jtf2;

  public LoginFrame() {
    init();
  }

  private void init() {
    setTitle("Java登录页面");
    setLocation(300, 200);
    setSize(300, 200); // 设置内容面板
    setContentPane(createContentPane());
  }

  private JPanel createContentPane() {
    JPanel pane = new JPanel(new BorderLayout(0, 8));
    pane.setBorder(new EmptyBorder(12, 12, 12, 12));
    pane.add(BorderLayout.NORTH, new JLabel("", JLabel.CENTER));
    pane.add(BorderLayout.CENTER, createNamePwdPane());
    pane.add(BorderLayout.SOUTH, createBtnPane());
    return pane;
  }

  private JPanel createNamePwdPane() {
    JPanel pane = new JPanel(new BorderLayout());
    JPanel top = new JPanel(new GridLayout(2, 1, 0, 6));
    pane.add(BorderLayout.NORTH, top);
    top.add(createNamePane());
    top.add(createPwdPane());
    return pane;
  }

  private JPanel createNamePane() {
    JPanel pane = new JPanel(new BorderLayout(4, 0));
    pane.add(BorderLayout.WEST, new JLabel("用户名:"));
    jtf1 = new JTextField();
    pane.add(BorderLayout.CENTER, jtf1);
    return pane;
  }

  private JPanel createPwdPane() {
    JPanel pane = new JPanel(new BorderLayout(4, 0));
    pane.add(BorderLayout.WEST, new JLabel("密     码:"));
    jtf2 = new JPasswordField();
    pane.add(BorderLayout.CENTER, jtf2);
    return pane;
  }

  private JPanel createBtnPane() {
    JPanel pane = new JPanel(new FlowLayout());
    JButton login = new JButton("登录");
    login.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        if (jtf2.getText().equals("123")
            && jtf1.getText().equals("123")) {
          System.out.println("登录 ");
        } else {
          System.out.println("登录失败");
        }
      }
    });
    JButton cancel = new JButton("退出");
    cancel.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        System.exit(0);
      }
    });
    pane.add(login);
    pane.add(cancel);
    return pane;
  }

  public void showView() {
    setVisible(true);
  }

  public static void main(String[] args) {
    LoginFrame lf = new LoginFrame();
    lf.showView();
  }
}