处理 4 中的导出应用程序失败并显示错误消息

Question

我正在尝试将我在 Processing 4 中开发的游戏导出为 windows 可执行文件。 代码本身运行良好，如有必要我可以发布所有代码，但是当我尝试导出它时出现以下错误：

java.lang.NullPointerException：无法调用“String.split(String)”，因为“processing.app.Preferences.get(String)”的返回值为 null

我检查了 preferences.txt 文件中的所有首选项，除了与代理相关的行和 run.options 之外，大多数都有值。

我搜索了 web 但找不到任何可能导致此问题的答案。

我在Windows 10 Pro 21H2上以 java 模式运行Processing 4.0b4并尝试导出到Windows (Intel 64-bit)

我的 java 版本：

openjdk 17.0.2 2022-01-18
OpenJDK Runtime Environment Temurin-17.0.2+8 (build 17.0.2+8)
OpenJDK 64-Bit Server VM Temurin-17.0.2+8 (build 17.0.2+8, mixed mode, sharing)

完整的例外：

Exporting application...

java.lang.NullPointerException: Cannot invoke "String.split(String)" because the return value of "processing.app.Preferences.get(String)" is null
at processing.mode.java.JavaBuild.exportApplication(JavaBuild.java:584)
at processing.mode.java.JavaMode.handleExportApplication(JavaMode.java:187)
at processing.mode.java.ExportPrompt.trigger(ExportPrompt.java:494)
at processing.mode.java.ExportPrompt.trigger(ExportPrompt.java:156)
at processing.mode.java.JavaEditor.handleExportApplication(JavaEditor.java:516)
at processing.mode.java.JavaEditor.lambda$buildFileMenu$0(JavaEditor.java:239)
at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1972)
at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2313)
at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:405)
at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262)
at java.desktop/javax.swing.AbstractButton.doClick(AbstractButton.java:374)
at java.desktop/javax.swing.AbstractButton.doClick(AbstractButton.java:354)
at java.desktop/javax.swing.plaf.basic.BasicMenuItemUI$Actions.actionPerformed(BasicMenuItemUI.java:983)
at java.desktop/javax.swing.SwingUtilities.notifyAction(SwingUtilities.java:1810)
at java.desktop/javax.swing.JComponent.processKeyBinding(JComponent.java:2947)
at java.desktop/javax.swing.JMenuBar.processBindingForKeyStrokeRecursive(JMenuBar.java:710)
at java.desktop/javax.swing.JMenuBar.processBindingForKeyStrokeRecursive(JMenuBar.java:717)
at java.desktop/javax.swing.JMenuBar.processBindingForKeyStrokeRecursive(JMenuBar.java:717)
at java.desktop/javax.swing.JMenuBar.processKeyBinding(JMenuBar.java:688)
at java.desktop/javax.swing.KeyboardManager.fireBinding(KeyboardManager.java:311)
at java.desktop/javax.swing.KeyboardManager.fireKeyboardAction(KeyboardManager.java:297)
at java.desktop/javax.swing.JComponent.processKeyBindingsForAllComponents(JComponent.java:3040)
at java.desktop/javax.swing.JComponent.processKeyBindings(JComponent.java:3032)
at java.desktop/javax.swing.JComponent.processKeyEvent(JComponent.java:2909)
at processing.app.syntax.JEditTextArea.processKeyEvent(JEditTextArea.java:1991)
at processing.mode.java.JavaTextArea.processKeyEvent(JavaTextArea.java:140)
at java.desktop/java.awt.Component.processEvent(Component.java:6403)
at java.desktop/java.awt.Container.processEvent(Container.java:2266)
at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:5001)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4833)
at java.desktop/java.awt.KeyboardFocusManager.redispatchEvent(KeyboardFocusManager.java:1952)
at java.desktop/java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(DefaultKeyboardFocusManager.java:883)
at java.desktop/java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(DefaultKeyboardFocusManager.java:1150)
at java.desktop/java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(DefaultKeyboardFocusManager.java:1020)
at java.desktop/java.awt.DefaultKeyboardFocusManager.dispatchEvent(DefaultKeyboardFocusManager.java:848)
at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4882)
at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324)
at java.desktop/java.awt.Window.dispatchEventImpl(Window.java:2780)
at java.desktop/java.awt.Component.dispatchEvent(Component.java:4833)
at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:722)
at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:716)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:97)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:746)
at java.desktop/java.awt.EventQueue$5.run(EventQueue.java:744)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:399)
at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:743)
at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

Answer 1

我遇到过同样的问题。 通过删除 java 的嵌入并导出，消息消失了。 最好的部分是，之后您现在可以将 java 的嵌入设置为 true，它会按预期工作。

Answer 2

在大约一个星期没有做任何不同的事情之后，在这段时间里尝试了多次并得到了同样的错误，我今晚最后一次尝试了一次并且没有明显的原因，它决定工作，因为它一直在工作。

我完全不知道发生了什么变化，但我想它现在起作用了。

（虽然我不知道如果它再次停止工作我需要做什么......）

Answer 3

对于尝试通过命令行导出时遇到此错误的任何人，请指定 output 目录为我修复它。 CLI 文档说 output 文件夹参数是可选的，但显然不是。