Copying to the system clipboard

Hi...
I am trying to copy the contents of a JPanel to the system clipboard so I can paste it into an app like MS Word. The JPanel just has some lines and dots on it that I've drawn with draw and fillOval.
I am VERY new to Java so the only way I could figure out to do this was to save the contents of the panel as a .jpg and then wrap it up in a class I created that implements the transferrable interface. This works....and I can paste it into Word and it looks fine on the screen. But when I print it.....it looks very grainy. So I'd like to be able to copy this panel to the clipboard in some other way besides saving it as an image first.
Is there any other direct way to copy components like a panel with shapes drawn on it to the system clipboard that anyone knows of?
Thanks in advance!
Julie

Thanks for the suggestion. I tried it...but it still looks like crap when I print it.
I am drawing directly on a Graphics2D object (the exact size I want), then I put into a BufferedImage. Then I save the BufferedImage as a .png, open it back up and copy it to the system clipboard.
It is just the image quality. Is there a way to manipulate the DPI?
Thanks again,
Julie

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Writing to the System clipboard

This company uses LabVIEW 2012 and LabWindows 2010 in an Aerospace environment. The use of older versions is done to have commonality with their facilities across the globe. Thus, I cannot get them to upgrade.
On their new test station, they have 14 serial ports to communicate with the unit under test. I have developed a LabVIEW serial port interface program that will allow them to communicate with those serial ports. I have the ini file configured to allow the user to run multiple instances of the executable, for as many ports as they desire, during their testing. One option that they requested is the ability to right click the mouse, have a menu display to select copy or copy all of the data to the clipboard so that they can paste the received data into a test report. I used the LabVIEW App Invoke Node function Write to Clipboard and Read From Clipboard to perform the task. However, I have the issue that this works on some instances and does not work on other instances of the executables. Since the code is the same, the user enters which port to connect to, I do not understand why I have this issue. It works fine on my PC which only has a single COM port.
I decided to write two LabWindows functions to read and write to the clipboard using ClipboardGetText and ClipboardPutText. I call those dll functions from LabVIEW. The first call to the function ClipboardPutText works in the sense that the data is placed into the clipboard. However, I immediately get a fatal error and the process stops. (I did not save a screen image and the test stations are in use at this time). After that, none of the other instances will copy the data and they all result in a fatal error and stop. This is repeatable as I restarted the software numerous times as I tried to determine the cause.
Since I do not have access to the code for the clipboard functions, I cannot determine if I need to configure something else related to the clipboard or the process attempting to read/write from/to the clipboard. I will continue to search but wanted to ask the experts in control of the clipboard software to determine if they have any recommendations on what may need to be added.
For LabWindows, the only other call that I performed was a free command after I executed the ClipboardGetText, if the pointer to the text was not NULL.
I will post this in both the LabVIEW and LabWindows discussion boards in case one or the other has a solution.
Thank you for your help.
I can provide a zip file, containing the source code, to NI personnel if you provide an email address. Since I am a contractor, I am not sure if the company’s policy allows global posting of their code, although I may be able to reduce the code to a minimum example, if necessary.

I have done more testing in an attempt to clarify the error condition. I upgraded to LabVIEW 2014 on a Windows 7 SP1 system. I have enclosed some screen shots to show what I am doing.
My software allows multiple copies, 14 in this case, versions of the executable to run at one time. The software controls serial ports. The enclosed image of the front panel, LabVIEW window.png, indicates the COM port, baud rate, and version at the top of the window. This first small control allows the user to enter a command to send to the port. The large bottom indicator displays the data received on the port. I have menu items, pressing the right mouse button, that allows the user to clear all of the data, copy selected data, or copy all data. I have enclosed images of the copy, copy all, write to clipboard, and read serial port parts of the code. I was only copying small amounts of data, perhaps less than 256 bytes.
Here’s what I have noticed:
If I execute the code on my desktop computer, only 1 COM port, everything works fine. The copy and copy all will place the data into the system clipboard which allows the pasting of the data into Notepad.
If I execute the code on the test station, opening all 14 ports, we are using the NI serial card for all of the additional ports, the code works fine, as in item 1, for a couple of the executables but not the rest.
If I select a subset of the data being displayed, highlighted in blue by LabVIEW, then right click the mouse selecting the copy, the blue highlighting goes away but the data is copied to the clipboard allowing me to paste into Notepad.
If I right click the mouse selecting copy all, the data is NOT copied to the system clipboard so that I cannot paste it into Notepad.
In the Write to Clipboard function, I write to the clipboard and then read the clipboard. I added code to display, in a popup window, what was written to the clipboard and what was read from the clipboard. The data was the same although the data was not on the system clipboard so that I could paste it into Notepad.
I tried to select a subset of the data being displayed and then right clicking the mouse to do a copy all to see if that made a difference. It did not.
I tried to make the Write to Clipboard function re-entrant to test that theory. Not change in the behavior.
At one point, I tried to use LabWindows. I used the LabWindows clipboard calls and then tried calling the Microsoft clipboard functions directly. While those functions worked in LabWindows without a problem, I would get executable crashes when I tried to call my LabWindows functions from LabVIEW. If I commented out the actually code part, the call to the functions would return without crashing the executable. The issue was not in how the LabWindows functions were being called but something in the clipboard calls themselves. So, I decided that making a call using LabWindows offered nothing that I could use. I returned to using only LabVIEW and updated to 2014 to determine if that might solve the issue. No luck so far.I do not understand why, when I call the LabVIEW function to write to the clipboard, that it does not work for every executable of the multiple instances. Is there some other function that needs to be called prior to writing to the clipboard due to having multiple instances? Why does selecting a subset work when I do the copy but not when I copy all. If I am passing the data to write to the clipboard, why does selecting a subset and the copying only that subset work but the copy all does not? I do not understand how LabVIEW handles multiple instances and is they are truly considered separate processes.
I seldom use these forums as I can get most of the code that I write to work as expected. Thank you for all of your help and suggestions.
Attachments:
LabVIEW window.png ‏25 KB
Copy Menu Item.png ‏39 KB
Copy ALL Menu Item.png ‏33 KB

Sending an image to the system clipboard

I've been trying to figure out how I can send an image to the system clipboard. At this state I'm beginning to think it's just not possible. This is the case:
I've got an applet running in a browser which creates a new window. I now want to copy the contents of this window to the system clipboard. So far I can only transfer text to the clipboard, but what I need is to copy a screenshot of the new window to the system clipboard.
Does anybody know how this can be done with Java or any kind of scripting language?

Since I already found the answer I rewarded 2 people for there help. This is the answer I found. Some code was found on the JDC Forum, but I can't remember who posted it or where I found it. So sorry that I can't give him credit...
Using JDK 1.4 the code could look like this:
-> This is how the policy file should look like:
grant
{ permission java.awt.AWTPermission "accessClipboard";
permission java.awt.AWTPermission "createRobot";
permission java.awt.AWTPermission "readDisplayPixels";
-> This is the code for the applet:
import java.awt.*;
public class ClipboardTest extends java.applet.Applet {
public void init() {
initComponents();
initialiseer();
private void initComponents() {
setLayout(new java.awt.BorderLayout());
public void initialiseer() {
// Here I create the actual frame that I can send to the clipboard
MySystemClipboard cb = new MySystemClipboard();
cb.setBounds(200,200,200,200);
cb.setVisible(true);
-> And here is the code for MySystemClipboard:
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.datatransfer.*;
public class MySystemClipboard extends Frame implements ActionListener,
ClipboardOwner
private Button myButton;
private Clipboard myClipboard;
private PrettyPicture myPicture;
public MySystemClipboard()
add(myButton = new Button("Clip"), BorderLayout.SOUTH);
add(myPicture = new PrettyPicture(), BorderLayout.CENTER);
myButton.addActionListener(this);
myClipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
public void actionPerformed(ActionEvent anEvent)
try
ClipImage ci = new ClipImage(new Robot().createScreenCapture(getBounds()));
myClipboard.setContents(ci, this);
catch (AWTException ae){}
public void lostOwnership(Clipboard clipboard, Transferable contents)
private class ClipImage implements Transferable
private DataFlavor[] myFlavors;
private BufferedImage myImage;
public ClipImage(BufferedImage theImage)
myFlavors = new DataFlavor[]{DataFlavor.imageFlavor};
myImage = theImage;
public Object getTransferData(DataFlavor flavor) throws UnsupportedFlavorException
if (flavor != DataFlavor.imageFlavor)
throw new UnsupportedFlavorException(flavor);
return myImage;
public DataFlavor[] getTransferDataFlavors()
return myFlavors;
public boolean isDataFlavorSupported(DataFlavor flavor)
return (flavor == DataFlavor.imageFlavor);
private class PrettyPicture extends Panel
public PrettyPicture()
setBackground(Color.gray);
add(new Button("Button1"), BorderLayout.NORTH);
add(new Button("Button2"), BorderLayout.CENTER);
add(new Button("Button3"), BorderLayout.SOUTH);
Hope this can help some other people

Need to save the image saved in the System Clipboard in using JDK 1.3.1

Does anyone know how to use JDK 1.3.1 to take an image saved in the System clipboard and save it to a file using the JPG format?
I know how it is done in JDK 1.4 using the following code. Unfortunately, the same code does not recognize the image in the clipboard in JDK 1.3.1
I am using jai-1_1_2_01.
package clipboard;
import java.awt.datatransfer.Clipboard;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.image.RenderedImage;
import java.awt.Toolkit;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.IOException;
import java.io.FileOutputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import javax.media.jai.JAI;
import javax.media.jai.RenderedOp;
public class clipboard
{ private File tempFile = null;
* @param args
static int BUFFER_SIZE = 65536;
public static void main(String[] args)
{ clipboard clip = new clipboard();
clip.writeImageFromClipboard();
public void writeImageFromClipboard()
{ Clipboard clip = Toolkit.getDefaultToolkit().getSystemClipboard();
Transferable transferable = clip.getContents(null);
RenderedImage img = null;
FileOutputStream fileOutStr = null;
BufferedOutputStream bufOutStr = null;
DataFlavor [] dataFlavors;
File tempFile;
int
byteCount;
String [] strArr;
dataFlavors = transferable.getTransferDataFlavors();
System.out.println("clip=" + clip.getName());
System.out.println("Transferable=" + transferable);
for (int i = 0; i < dataFlavors.length; i++)
{ System.out.println("dataFlavours[" + i + "]=" + dataFlavors.toString());
if (transferable.isDataFlavorSupported(new DataFlavor("image/x-java-image; class=java.awt.Image", "Image")))
{ try
{ img = (RenderedImage) transferable.getTransferData(new DataFlavor("image/x-java-image; class=java.awt.Image", "Image"));
if (this.tempFile == null)
{ this.tempFile = File.createTempFile("__TMP_IMG__", ".jpg");
System.out.println(this.tempFile.getCanonicalPath());
fileOutStr = new FileOutputStream(this.tempFile);
bufOutStr = new BufferedOutputStream(fileOutStr);
// Encode the file as a JPG image.
JAI.create("encode", img, bufOutStr, "JPEG", null);
catch (UnsupportedFlavorException e)
{ e.printStackTrace();
catch (IOException e)
{ e.printStackTrace();
finally
{ if (bufOutStr != null)
{ try
{ bufOutStr.flush();
bufOutStr.close();
catch (IOException e)
if (fileOutStr != null)
{ try
{ fileOutStr.flush();
fileOutStr.close();
catch (IOException e)
else
{ System.out.println("Not an image!");

The login you connected to the server and run the above statement does not have permissions to operate on this path "C:\Users\ISLLCdba\Desktop\MAA
PROFILE PICTURES\"
Best Regards,Uri Dimant SQL Server MVP,
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How can I copy and paste from Google "Keep"? Whenever i try, the copied text doesn't get copied on the Firefox clipboard, it copies to my 'default' clipboard.

I can't get the Firefox clipboard to appear when i try to copy from Google Keep. Please help, thanks.

Hi again LvScience:
(jsoulless40's advice (thanks js40!) of trying the desktop site in Firefox when using the Keep web app is fine but i think you are using the Keep App right, not the web app version right?)
Thanks for the device info: "Android OS is 4.1.2 on a Samsung Rugby Pro". I don't have that tablet but I do have two android samsung tablets running 4.x
I should have asked before:
'''What exact steps where you following when you copied and pasted into a "newly opened document"'''
My steps were (on my Samsung Tab S 10 running 4.4.2):
# in Firefox selected and then copied some text
# switched to Google's Keep app
# '''successfully pasted the text in Keep into the "Add quick note", also tapped on the new note icon and pasted the text into a new note'''

How cacn I clear the system clipboard content? and notify

Hi all,
I have any question please,
-How can I clear the content of system clipboard?
-How can I notify if a paste failed, the application which start the cut, so not remove the elements which selected for cut? /Cut & paste between two applications/
Thx.

Hi,
try to search the forum as I did:
http://onesearch.sun.com/search/onesearch/index.jsp?charset=utf-8&qt=how+to+use+clipboard&rf=0&rt=1&nh=10&cs=0&y=0&x=0&col=developer-forums
L.P.

How to returm data in the form of InputStream to the System Clipboard ?

Hi All,
I wanted to transfer some data to the clipboard from the file using InputStream. How can I do that ? How to close the InputStream after datatransfer finished ? Some code would be great help.......
Thanks,
Sid

Hello,
I think the easiest way is to just define a table with line type of a long charachter field e.g. chart255 or string. Then get the lines by splitting the string into a table then loop about the table.
DATA:
lv_string TYPE string,
lv_line TYPE string,
lt_lines TYPE STANDARD TABLE OF string.
lv_string = 'line1##line2##line3##line4'.
SPLIT lv_string AT '##' INTO TABLE lt_lines.
LOOP AT lt_lines INTO lv_line.
WRITE / lv_line.
ENDLOOP.
Best Regards
Roman

Problems copying from PJC to system clipboard

I am working on a PJC to allow for editing of large text fields (> 64K). I have most of the functionality working fine. However, I am having a problem using cut, copy, and paste.
Some details, the PJC extends VBean and includes as JTextArea. Our users want a right click menu to provide functionality for cutting, copying, pasting, and spell checking. I was able to get the spell check working using JSpell. I am not able to get the menu entries for cut, copy, and paste to work. I construct a JPopMenu with the appropriate items. When the menu is activated, if the user selects cut, the actionPerformed method executed the cut method of the JTextArea. This does cut the text from the item, however it is not added to the clipboard for use in other items, except those that have the same implementation class of the original item. If the user uses the keyboard (CTRL-X, CTRL-C, or CTRL-V) the selected data is copied to the system clipboard
Here is the method I used to create the menu items:
private JMenuItem makeMenuItem(String label, char acceleratorKey)
    JMenuItem item = new JMenuItem(label);
    item.addActionListener(this);
    item.setMnemonic(acceleratorKey);
    item.addKeyListener(this);
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    item.setHorizontalAlignment(SwingConstants.LEFT);
    printDebugMessage("Horizontal text alignment = " + item.getHorizontalAlignment());
    return item;
}Here is the actionPerformed method:
public void actionPerformed(ActionEvent ae)
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    if (selection.equals("Cut"))
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      printDebugMessage("Copy selected");
      text.copy();
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    else if (selection.equals("Spell Check"))
      printDebugMessage("Spell Check selected");
      doSpellCheck();
}I read that jar files needed to be signed to interact with the desktop, but when I signed the jar file the results were the same.
Platform
10g AS on Solaris 10.1.2.2
Windows XP (SP2)
IE7
Sun plugin 1.5.0_11 (problem also occurs with 1.4.2_06)
Any insights would be helpful.
Thanks

will that create a problem?Try it and see.

Signed Applet JTextField copy to system clipboard

Hi all,
We have a signed and deployed our JAR file that contains our applet following the instructions listed at:
http://java.sun.com/products/plugin/1.3/docs/rsa_signing.html
We used Thwate as our CA. All seemed good.
However any JTextFields that are in our applet cannot access the system clip board. Looking at the source for JTextComponent it should have access to the system clipboard if the securitymanager allows it.
The strange thing is that if I call getToolkit().getSystemClipboard() from our applets I can access the clipboard and copy to the system clipboard. Even the code in JTextComponent that checks for system clipboard access (canAccessSystemClipboard) works fine when pasted into the applet.
Why cant a JTextField copy to the clipboard? Has anyone else come across this?

Juste an idea.... Is your JTextField belonging to the javax.swing.... packages ?
Or did you compile using some com.ms , ibm.... sun... package ? This could lead to some different implementations.

Detect something just copied to the clipboard

Hi everyone,
I'm wondering if it is possible for a java program to detect something just got copied into the system's clipboard? I don't mind using JNI if that helps. I need to be notified after a user "right click and select copy" in any application. They can be copying something in microsoft word and i want to be notified in my java program when a copy-to-clipboard is just made. Is this even possible in Java? I searched the forumn and didn't see any topic on this. TIA

Run this program, it is an example of monitoring the clipboard.
import java.awt.*;
import java.awt.datatransfer.*;
class MyClipboardOwner implements ClipboardOwner {
    public void lostOwnership(Clipboard clipboard, Transferable contents) {
        System.out.println ("Someone copied something to the clipboard");
        DataFlavor[] df = contents.getTransferDataFlavors();
        for (int i = 0; i < df.length; ++i) {
            System.out.println (df);
public class Test105 {
public static void main(String[] args) throws Exception {
Clipboard cb = Toolkit.getDefaultToolkit().getSystemClipboard();
cb.setContents(new StringSelection ("Put this in the clipboard"), new MyClipboardOwner());
while (true) {
try { Thread.sleep(100); } catch (InterruptedException ex) {}

Can't copy to the clipboard in applet

hi all,
doing an applet application now, i figure out that when i want to copy a string to the system clipboard (i use the popup menu), JAVA console prompt out error message AccessDenied or if other case, it will prompt NoClassFound .getWindow(Unknow Source)*, this is only happen in Firefox but not IE (and i need it to work on Firefox). but in the other hand, i have another applet application where i use the button to copy the string into the clipboard in Firefox, it has no problem except ask me to enabled the "signed.applets.codebase_principal_support" value to true, then it successfully copied to the cliboard but not the popup menu applet, why?
* this is when i didn't use java.awt.datatransfer.* but use JSObject
anyone has idea? thanks. it seem a bit messy, i'll explain more to you if there is something miss out, thanks again

Move off WEP to WPA or, preferably, to WPA2 (as recommended by Apple). WEP has been deprecated by the WiFi Alliance since 2004 as insecure (it can be cracked in seconds by any hacker).
Note that each device on a network has a unique IP address but if your address starts with 169 then you did not get a valid IP address assigned to you by your router. If restarting the router did not cure the problem then you should check for a firmware update for your router.

Programatically copy to System Clipboard

I'm trying to programatically copy a value from my applet to the system clipboard without much luck. My jars have all been signed and I am able to ctrl-c and ctrl-v to/from the applet/system clipboard. What I need to be able to do is invoke this behaviour from a popup menu. Below is a code snippet:
public void actionPerformed(ActionEvent event)
               Object source = event.getSource();
               String strValue = source.toString();
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               Toolkit.getDefaultToolkit().getSystemClipboard().setContents( strSelection , strSelection );
                // at this point I have verified that 't' does indeed contain my item.
               Transferable t =Toolkit.getDefaultToolkit().getSystemClipboard().getContents(strSelection );
}When I try to paste into, say notepad, there does not appear to be anything in the clipboard.
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Thanks,
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I guess you didn't sign it right or called your method from untrusted (unsigned) code.
for signing:
http://forum.java.sun.com/thread.jsp?forum=63&thread=524815
second post
for a full trace:
To turn the full trace on (windows) you can start the java console, to be found here:
C:\Program Files\Java\j2re1.4...\bin\jpicpl32.exe
In the advanced tab you can fill in something for runtime parameters fill in this:
-Djavaplugin.trace=true -Djavaplugin.trace.option=basic|net|security|ext|liveconnect
if you cannot start the java console check here:
C:\Documents and Settings\userName\Application Data\Sun\Java\Deployment\deployment.properties
I think for linux this is somewhere in youruserdir/java (hidden directory)
add or change the following line:
javaplugin.jre.params=-Djavaplugin.trace\=true -Djavaplugin.trace.option\=basic|net|security|ext|liveconnect
for 1.5:
deployment.javapi.jre.1.5.0.args=-Djavaplugin.trace\=true -Djavaplugin.trace.option\=basic|net|security|ext|liveconnect
The trace is here:
C:\Documents and Settings\your user\Application Data\Sun\Java\Deployment\log\plugin...log
I think for linux this is somewhere in youruserdir/java (hidden directory)

Copying to system clipboard

i m tryin to copy an image to the system clipboard,. the syntax being the usual
Toolkit.getDefaultToolkit().getSystemClipboard().setContents(selectedImage,null);
i m not invoking the method javax.swing.SwingUtilities.invokeLater(new Runnable(){
public void run()
will that create a problem? cuz i can run it normally wen i m not

will that create a problem?Try it and see.

Massive copy to system clipboard with vim?

Say I'm editing a program with vim through a terminal (say xterm). Does anyone know how to copy the contents, via left click highlighting, onto the system clipboard (x11) when the content that needs to be copied is physically off the screen? I've tried to arrow up while highlighting but it doesn't work.

toxic, from what I understand from t-dawg's questions is that he wants to emulate what you can do in gvim, but with vim instead.
In gvim, I can click the mouse button; hold; drag downwards and then gvim will start scrolling downwards, whilst highlighting the passing lines. This is how you highlight large amounts of text (greater than what can fit in a single screen at a time) with a mouse.
However, terminals are slightly dumber. Whilst you can highlight areas of text, that's a console function and not something that vim itself is monitoring. Therefore, you can't achieve the same effect with the mouse in vim as you can in gvim.
Of course, vim is perfectly capable of selecting more text than can fit in a single screen. It has a visual mode. Press v and then move down with your cursor keys, et volia - highlighted text.
Now when it comes to shifting this to X11's clipboard, I've never tried (hence the link I gave for possible help). I'm sure it can be done.

WebView - text copied with Crtl/C or Popup Menu not in system clipboard!

Dear JavaFX users,
We have embedded JavaFX WebView in a Swing panel. Everything works fine, but we have realized that text selected and copied with Crtl/C or Popup Menu is not in the system clipboard.
This is quite annoying, and we woulld appreciate any advice or suggestion for solving this issue.
Thanks in advance,
Best,
Jean-Claude Dauphin

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Copying to the system clipboard

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