Question

我在jre6.0.33 +中运行的applet代码中获得此堆栈跟踪但在7.025中失败了。任何人都可以帮助我理解为什么并且正确吗？

   Exception in thread "AWT-EventQueue-2" java.lang.NullPointerException
    at sun.awt.SunToolkit.getSystemEventQueueImplPP(Unknown Source)
    at sun.awt.SunToolkit.getSystemEventQueueImplPP(Unknown Source)
    at sun.awt.SunToolkit.getSystemEventQueueImpl(Unknown Source)
    at java.awt.Toolkit.getEventQueue(Unknown Source)
    at java.awt.EventQueue.isDispatchThread(Unknown Source)
    at javax.swing.SwingUtilities.isEventDispatchThread(Unknown Source)
    at javax.swing.JComponent.revalidate(Unknown Source)
    at javax.swing.JTable.resizeAndRepaint(Unknown Source)
    at javax.swing.JTable.sortedTableChanged(Unknown Source)
    at javax.swing.JTable.sorterChanged(Unknown Source)
    at javax.swing.RowSorter.fireRowSorterChanged(Unknown Source)
    at javax.swing.RowSorter.fireRowSorterChanged(Unknown Source)
    at javax.swing.DefaultRowSorter.sort(Unknown Source)
    at sun.swing.FilePane$DetailsTableRowSorter.access$1601(Unknown Source)
    at sun.swing.FilePane$DetailsTableRowSorter$1.call(Unknown Source)
    at sun.swing.FilePane$DetailsTableRowSorter$1.call(Unknown Source)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at sun.awt.shell.Win32ShellFolderManager2$ComInvoker$3.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

Answer 1

Mea culpa 是的，我应该克制并阅读。问题是排序对话框。我接受了我的失败惩罚。我希望尽管他们是，我仍然可以发布天真。请注意，这不是讽刺，即使声明压力很大。

Answer 2

我也是如此，它显然是一个＆＃34;化身＆＃34;根据{{3}}，this bug。它似乎是固定的，但仅限于JDK8版本。 OTOH，似乎有一个＆＃34; Apple补丁＆＃34;修正了（大概）JDK 7（但仅限Apple用户）。

applet fileopen对话框npe

2 个答案: