java - 如何清除 Java 中的系统剪贴板？

Question

如何在 Java 中清除系统剪贴板？我试过了

Toolkit.getDefaultToolkit().getSystemClipboard().setContents(null, null);

但它刚刚抛出了一个NPE:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException: contents
    at sun.awt.datatransfer.SunClipboard.setContents(SunClipboard.java:98)

Answer 1

您可以创建一个明确不包含任何数据的特殊Transferable，详见in this blog post :

  clipboard.setContents(new Transferable() {
    public DataFlavor[] getTransferDataFlavors() {
      return new DataFlavor[0];
    }

    public boolean isDataFlavorSupported(DataFlavor flavor) {
      return false;
    }

    public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException {
      throw new UnsupportedFlavorException(flavor);
    }