第五章GUI程序设计与常用组件.ppt

实例：一个GUI程序 public login( ) { createUserInterface(); // 调用创建用户界面方 } private void createUserInterface() {//创建框架 Container contentPane = getContentPane(); contentPane.setLayout( null ); userJPanel = new JPanel(); userJPanel.setBounds( 35, 120, 300, 96 ); userJPanel.setBorder(BorderFactory.createEtchedBorder() ); userJPanel.setLayout( null ); contentPane.add( userJPanel ); // 建立输入注册名组合框 nameJComboBox = new JComboBox(); nameJComboBox.setBounds( 100, 12, 170, 25 ); nameJComboBox.addItem( admin ); nameJComboBox.addItem( aloie ); nameJComboBox.setSelectedIndex( 0 ); nameJComboBox.setEditable(true); userJPanel.add( nameJComboBox ); //GUI界面显示图片 pictureJLabel=new JLabel(); pictureJLabel.setBounds(5,0,380,118); pictureJLabel.setIcon(new ImageIcon(pic.gif)); contentPane.add(pictureJLabel); //注册名前的标签 nameJLabel=new JLabel(姓 名：); nameJLabel.setBounds(20,12,80,25); userJPanel.add(nameJLabel); //密码输入框 passwordJPasswordField=new JPasswordField(); passwordJPasswordField.setBounds(100,60,170,25); userJPanel.add(passwordJPasswordField); passwordJLabel=new JLabel(密 码：); passwordJLabel.setBounds(20,60,80,25); userJPanel.add(passwordJLabel); note=new JLabel(密码与用户名相同); note.setBounds(0,295,180,25); userJPanel.add(note); 实例：一个GUI程序 //登录按钮设置 okJButton=new JButton(登 陆); okJButton.setBounds(60,250,80,25); contentPane.add(okJButton); okJButton.addActionListener( new ActionListener() { public void actionPerformed(ActionEvent event) { okJButtonActionPerformed(event); } } ); //取消按钮设置 cancelJButton=new JButton(取 消); cancelJButton.setBounds(210