java - 任何适用于 JWindow 的方法，如 setOpacity

Question

我只是想知道是否有任何方法类似于setOpacity(float); 与 JWindow 一起使用。我已经尝试过 setOpacity 方法，但它似乎不适用于 JWindows，因为在尝试使用该方法时出现以下错误

Window 类型的方法 setOpacity(float) 不可见

这是我的主要方法中的代码。

JWindow window = new JWindow();
window.setSize(100.100);
window.setVisible(true);

Answer 1

最简洁的答案是不。但是您还可以做其他事情。

首先看看如何创建半透明和异形窗口

public class TranslucentWindow {

    public static void main(String[] args) {
        new TranslucentWindow();
    }

    public TranslucentWindow() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                JWindow window = new JWindow();
                window.setSize(100, 100);
                window.setBackground(new Color(255, 0, 0, 128));
                window.setLocationRelativeTo(null);
                window.setVisible(true);

            }
        });
    }

}

更新

在 Windows 7 和 MacOS X、Java 7 下确认操作

更新

试着检查一下是否真的支持半透明......

GraphicsEnvironment ge
        = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = ge.getDefaultScreenDevice();

boolean isUniformTranslucencySupported
        = gd.isWindowTranslucencySupported(TRANSLUCENT);
boolean isPerPixelTranslucencySupported
        = gd.isWindowTranslucencySupported(PERPIXEL_TRANSLUCENT);
boolean isShapedWindowSupported
        = gd.isWindowTranslucencySupported(PERPIXEL_TRANSPARENT);

System.out.println("Hello");

if (isUniformTranslucencySupported && isPerPixelTranslucencySupported && isShapedWindowSupported) {

    // Build window as normal...

} else {

    if (!isUniformTranslucencySupported) {
        System.err.println("Translucentancy is not support");
    }
    if (!isPerPixelTranslucencySupported) {
        System.err.println("Per Pixel Translucentancy is not support");
    }
    if (!isShapedWindowSupported) {
        System.err.println("Per Pixel Transparenancy is not support");
    }

    System.exit(0);

}