java实现简单QQ登录界面

package com.ts.x.swing;  import java.awt.Color; import java.awt.Container; import java.awt.Cursor; import java.awt.Font; import java.awt.Image; import java.awt.event.ActionEvent; import java.awt.event.ActionListener;  import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JPasswordField; import javax.swing.JRootPane; import javax.swing.JTextField;  public class QQ extends JFrame{    private static final long serialVersionUID = -6788045638380819221L;  //用户名  private JTextField ulName;  //密码  private JPasswordField ulPasswd;  //小容器  private JLabel j1;  private JLabel j2;  private JLabel j3;  private JLabel j4;  //小按钮  private JButton b1;  private JButton b2;  private JButton b3;  //复选框  private JCheckBox c1;  private JCheckBox c2;  //列表框  private JComboBox<String> cb1;  /**   * 初始化QQ登录页面   * */  public QQ(){   //设置登录窗口标题   this.setTitle("QQ登录");   //去掉窗口的装饰(边框) //  this.setUndecorated(true);   //采用指定的窗口装饰风格   this.getRootPane().setWindowDecorationStyle(JRootPane.NONE);   //窗体组件初始化   init();   this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   //设置布局为绝对定位   this.setLayout(null);   this.setBounds(0, 0, 355, 265);   //设置窗体的图标   Image img0 = new ImageIcon("D:/logo.png").getImage();   this.setIconImage(img0);   //窗体大小不能改变   this.setResizable(false);   //居中显示   this.setLocationRelativeTo(null);   //窗体显示   this.setVisible(true);  }  /**   * 窗体组件初始化   * */  public void init(){   //创建一个容器,其中的图片大小和setBounds第三、四个参数要基本一致(需要自己计算裁剪)   Container container = this.getContentPane();   j1 = new JLabel();   //设置背景色   Image img1 = new ImageIcon("D:/bgimg.png").getImage();   j1.setIcon(new ImageIcon(img1));   j1.setBounds(0, 0, 355, 265);   //qq头像设定   j2 = new JLabel();   Image img2 = new ImageIcon("D:/hdimg.png").getImage();   j2.setIcon(new ImageIcon(img2));   j2.setBounds(40, 95, 50, 53);   //用户名输入框   ulName = new JTextField();   ulName.setBounds(100, 100, 150, 20);   //注册账号   j3 = new JLabel("注册账号");   j3.setBounds(260, 100, 70, 20);   //密码输入框   ulPasswd = new JPasswordField();   ulPasswd.setBounds(100, 130, 150, 20);   //找回密码   j4= new JLabel("找回密码");   j4.setBounds(260, 130, 70, 20);   //记住密码   c1 = new JCheckBox("记住密码");   c1.setBounds(105, 155, 80, 15);   //自动登陆   c2 = new JCheckBox("自动登陆");   c2.setBounds(185, 155, 80, 15);   //用户登陆状态选择   cb1 = new JComboBox<String>();   cb1.addItem("在线");   cb1.addItem("隐身");   cb1.addItem("离开");   cb1.setBounds(40, 150, 55, 20);   //登陆按钮   b1 = new JButton("登录");   //设置字体和颜色和手形指针   b1.setFont(new Font("宋体", Font.PLAIN, 12));   b1.setForeground(Color.RED);   b1.setCursor(Cursor.getPredefinedCursor(Cursor.HAND_CURSOR));   b1.setBounds(280, 200, 65, 20);   //给按钮添加   b1.addActionListener(new ActionListener() {    @Override    public void actionPerformed(ActionEvent e) {     String cmd = e.getActionCommand();     if("登录".equals(cmd)){      String username = ulName.getText();      String userpassword = ulPasswd.getText();      if(username.equals("tskk") && userpassword.equals("123456")){       JOptionPane.showConfirmDialog(null, "登录成功");      }else{       JOptionPane.showConfirmDialog(null, "登录失败");      }     }    }   });   //多账号   b2 = new JButton("多账号");   b2.setBounds(5, 200, 75, 20);   //设置   b3 = new JButton("设置");   b3.setBounds(100, 200, 65, 20);   //所有组件用容器装载   j1.add(j2);   j1.add(j3);   j1.add(j4);   j1.add(c1);   j1.add(c2);   j1.add(cb1);   j1.add(b1);   j1.add(b2);   j1.add(b3);   container.add(j1);   container.add(ulName);   container.add(ulPasswd);  }  public static void main(String[] args) {   new QQ();  } }