设置背景图片

class MyBkFrame extends JFrame{MyBkFrame( String name ){JPanel pan = new JPanel(new BorderLayout());ImageIcon ii = new ImageIcon(name);//加载图片JLabel lab = new JLabel(ii);//图片放到Label内lab.setBounds(0, 0,ii.getIconWidth(), ii.getIconHeight());//设置Label的大小正好是图片大小this.getLayeredPane().setLayout(null);//this.setTitle("测试Java的背景图片设置");this.getLayeredPane().add(lab, new Integer(Integer.MIN_VALUE));//把Label(内有图片)放到工作区的下层，做背景图片this.setContentPane(pan);//设置装有操作组件的Panel为ContentPnelpan.setOpaque(false);//设置Pan为透明int w = Toolkit.getDefaultToolkit().getScreenSize().width;int h = Toolkit.getDefaultToolkit().getScreenSize().height;setBounds(0, 0, w, h);setVisible(true);this.setDefaultCloseOperation(EXIT_ON_CLOSE);}}