Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

clipboard question

Posted on 2002-07-11
1
Medium Priority
?
202 Views
Last Modified: 2012-06-27
Im trying to make a simple program that can tell whenever something new is copied to the clipboard.  This is what I have:

class ClipboardWatcher {

   public static void main (String[] args) {
      init();
   }

   public static void init() {
      String s = getClipboard();
      ClipboardOwner owner = new MyClipboardOwner();
      setClipboard(s, owner);
   }

   public static String getClipboard() {
      Transferable t = Toolkit.getDefaultToolkit().getSystemClipboard().getContents(null);
      String s = " ";
      try {
         if (t != null && t.isDataFlavorSupported(DataFlavor.stringFlavor)) {
            s = (String)t.getTransferData(DataFlavor.stringFlavor);
          }
      } catch (UnsupportedFlavorException e) {
      } catch (java.io.IOException e) {
      }
      return s;
   }

   public static void setClipboard (String s, ClipboardOwner owner) {
      StringSelection ss = new StringSelection(s);
      Toolkit.getDefaultToolkit().getSystemClipboard().setContents(ss, owner);
   }
}

class MyClipboardOwner implements ClipboardOwner {
     
   public void lostOwnership(Clipboard clipboard, Transferable contents) {
      System.out.println("Clipboard has changed");
      ClipboardWatcher.init();
      System.out.println(MainFrame.getClipboard());
   }
}

The way the program is supposed to work, it is should print out "Clipboard has changed" and then print the new clipboard contents.  The problem is that the program enters in an infinite loop with this code as soon as the user copys something.  What I've found is that the getClipboard() method does not get the new clipboard text, instead it returns the text that the clipboard had when the program was first run.

What am I doing wrong here?

Thanks for your time.
0
Comment
Question by:lwinkenb
1 Comment
 
LVL 9

Accepted Solution

by:
Ovi earned 400 total points
ID: 7148350
I believe the method lostOwnership get's called before the content of the clipboard was released and replaced with the new one.

Try this :
   public void lostOwnership(Clipboard clipboard, Transferable contents) {
     new Thread(new Runnable() {
       public void run() {
         try {Thread.sleep(500);} catch(Exception e) {}
         System.out.println("Clipboard has changed");
         ClipboardWatcher.init();
         System.out.println(MainFrame.getClipboard());
       }
     }).start();
   }
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Java Flight Recorder and Java Mission Control together create a complete tool chain to continuously collect low level and detailed runtime information enabling after-the-fact incident analysis. Java Flight Recorder is a profiling and event collectio…
Java functions are among the best things for programmers to work with as Java sites can be very easy to read and prepare. Java especially simplifies many processes in the coding industry as it helps integrate many forms of technology and different d…
Viewers will learn about the regular for loop in Java and how to use it. Definition: Break the for loop down into 3 parts: Syntax when using for loops: Example using a for loop:
The viewer will learn how to implement Singleton Design Pattern in Java.
Suggested Courses

783 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question