在Java中，为什么我会得到java.lang.IllegalStateException：无法打开系统剪贴板？
这是在使用Java 1.8.0_181 25.181-b13的Windows上运行
的。java.lang.IllegalStateException: cannot open system clipboard
at sun.awt.windows.WClipboard.openClipboard(Native Method)
at sun.awt.datatransfer.SunClipboard.getClipboardFormatsOpenClose(SunClipboard.java:327)
at sun.awt.datatransfer.SunClipboard.isDataFlavorAvailable(SunClipboard.java:188)
at com.jthink.songkong.ui.startdialog.editsongs.EditSongsTable$PasteAction$1.flavorsChanged(EditSongsTable.java:170)
at sun.awt.datatransfer.SunClipboard$1SunFlavorChangeNotifier.run(SunClipboard.java:441)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
PasteAction方法是
public PasteAction(JTable tbl)
{
putValue(NAME, TextLabel.PASTEBUTTON.getMsg());
putValue(ACCELERATOR_KEY, KeyStroke.getKeyStroke(KeyEvent.VK_V, Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
table = tbl;
final Clipboard cb = Toolkit.getDefaultToolkit().getSystemClipboard();
cb.addFlavorListener(new FlavorListener()
{
@Override
public void flavorsChanged(FlavorEvent e)
{
try
{
setEnabled(cb.isDataFlavorAvailable(CellTransferable.CELL_DATA_FLAVOR)
|| cb.isDataFlavorAvailable(DataFlavor.stringFlavor));
}
catch(IllegalArgumentException iae)
{
MainWindow.logger.log(Level.SEVERE, iae.getMessage(), iae);
}
}
});
setEnabled(cb.isDataFlavorAvailable(CellTransferable.CELL_DATA_FLAVOR)
|| cb.isDataFlavorAvailable(DataFlavor.stringFlavor));
}
当 Java 应用程序收到它已失去所有权的通知时，就会发生这种情况，因此它有时需要留出少量时间让剪贴板"准备就绪"。通过向方法添加一个非常短的 sleep 命令，我们将能够避免运行时异常。请转到以下链接以获取更多信息
https://coderanch.com/t/377833/java/listen-clipboard