Question

Java窗口图片的透明部分显示为白色，怎么才能让图片的透明部分不挡住下面的背景？

代码:
URL urlTitle = Start.class.getResource("title.png");
Icon iconTitle=new ImageIcon(urlTitle);
JPanel panelTitle = new JPanel();
JLabel labelTitle=new JLabel(iconTitle);
panelTitle.add(labelTitle);
panelTitle.setBounds(450, 20, 826, 250);
add(panelTitle);

Answer 1

看下这个应该对您有帮助： Swing最新特性：增加透明窗体及不规则窗体功能http://www.javaeye.com/news/1508 透明窗体： public class TranslucentWindow extends JFrame { public TranslucentWindow() { super("透明窗体"); this.setLayout(new FlowLayout()); this.add(new JButton("按钮")); this.add(new JCheckBox("复选按钮")); this.add(new JRadioButton("单选按钮")); this.add(new JProgressBar(20, 100)); this.setSize(new Dimension(400, 300)); this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public static void main(String[] args) { JFrame.setDefaultLookAndFeelDecorated(true); SwingUtilities.invokeLater(new Runnable() { public void run() { Window w = new TranslucentWindow(); w.setVisible(true); com.sun.awt.AWTUtilities.setWindowOpacity(w, 0.6f); } }); } }