我在运行时不断收到此错误，但我不知道是什么原因造成的。它认为缺少文件？

引起:java.io.FileNotFoundException: C:\Program Files\Java\jdk1.7.0_07\lib\currency.data

什么是 currency.data，谁能告诉我为什么会这样，我的 JDK 不是那么旧，因为我们现在是 7u17。

Exception in thread "AWT-EventQueue-0" java.lang.InternalError
    at java.util.Currency$1.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.util.Currency.<clinit>(Unknown Source)
    at java.text.DecimalFormatSymbols.initialize(Unknown Source)
    at java.text.DecimalFormatSymbols.<init>(Unknown Source)
    at java.text.DecimalFormatSymbols.getInstance(Unknown Source)
    at java.text.NumberFormat.getInstance(Unknown Source)
    at java.text.NumberFormat.getNumberInstance(Unknown Source)
    at java.util.Scanner.useLocale(Unknown Source)
    at java.util.Scanner.<init>(Unknown Source)
    at java.util.Scanner.<init>(Unknown Source)
    at ciphor.CiCompile$7.actionPerformed(CiCompile.java:458)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Window.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$200(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: java.io.FileNotFoundException: C:\Program Files\Java\jdk1.7.0_07\lib\currency.data (The system cannot find the file specified)
    at java.io.FileInputStream.open(Native Method)
    at java.io.FileInputStream.<init>(Unknown Source)
    at java.io.FileInputStream.<init>(Unknown Source)
    ... 48 more

我在 JDK 环境下运行我的程序，我检查了我的 jre7 文件夹，currency.data 在那里!为什么它只存在于 jre 文件夹中？

最佳答案

我遇到了类似的错误，这只是为了帮助其他可能陷入同样陷阱的人:)

错误:

java.lang.InternalError: java.io.FileNotFoundException: null/lib/currency.data (No such file or directory)

这是因为我设置了全局属性，结果证明这是一件非常不聪明的事情。

System.setProperties(new Properties());

系统属性填充了非常重要的数据，包括:

• 路径分隔符
• 用户目录
• 文件编码
• 文件.分隔符
• java.io.tmpdir

所以除非你知道自己在做什么，否则基本上不要做上面的事情。

如果您想要一个属性，请改为执行此操作:

System.getProperties().put("SOME_KEY", "SOME_VALUE");

或

Map myCustomMapOfProps = ...
System.getProperties().putAll(myCustomMapOfProps);

关于java - 奇怪的 Java 运行时错误 - currency.data，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/15823126/