Java - Clipboard copied content disappear after program exits

I would like to replace the system clipboard content with my java code, but the copied content disappears once the java p开发者_开发知识库rogram exits. How can I make the data persistent?

Thanks a lot.

        Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
        Transferable t = clipboard.getContents(null);

        if (t.isDataFlavorSupported(DataFlavor.stringFlavor))
        {
            String data = (String) t.getTransferData(DataFlavor.stringFlavor);
            System.out.println(data);
        }

        StringSelection stringSelection = new StringSelection("Replaced Text");
        clipboard.setContents(stringSelection, null);

        // just to keep program running... 
        Scanner scanner = new Scanner(System.in);
        scanner.nextLine();

edit: I work on Ubuntu 10.10, with java version 1.6_20.

It seems that the one that (your program) put the clipboard content on the clipboard must be able to serv it in Ubuntu 10.10.

Installing glipper (sudo apt-get install glipper) works for me. It manages your clipboard. (It's an applet so it seems that it must be added to your panel to start.)