获取 HeadlessException：未设置 X11 DISPLAY 变量

Question

Exception in thread "main" java.awt.HeadlessException:
    No X11 DISPLAY variable was set, but this program performed an operation which requires it.
        at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)
        at java.awt.Window.<init>(Window.java:432)
        at java.awt.Frame.<init>(Frame.java:403)
        at javax.swing.JFrame.<init>(JFrame.java:202)
        at DrawGUI.<init>(DrawGUI.java:15)
        at ShapeCreator.<init>(ShapeCreator.java:31)
        at ShapeCreator.main(ShapeCreator.java:138)

这个错误信息是什么意思？我该如何解决？

原文由 Ahsan 发布，翻译遵循 CC BY-SA 4.0 许可协议

Answer 1

我假设您正试图通过隧道进入某个 unix 机器。

确保在您的 PuTTY 设置中启用了 X11 转发。

原文由 adarshr 发布，翻译遵循 CC BY-SA 2.5 许可协议