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copied!<p>What does <code>MyFrame.ShowSaveDialog();</code> return? The key is to create a FileOutputStream with the appropriate constructor (the second parameter should be the boolean <code>true</code>) which will make it an appending FileOutputStream, and then construct your PrintStream using this FileOutputStream object.</p> <p>For instance, if showSaveDialog() (note that method and variable names should begin with lower case letters) returns the name of a file or a File object, you could do something like so:</p> <pre><code>try { File file = myFrame.showSaveDialog(); // if this method returns a File!!!!! FileOutputStream fos = new FileOutputStream(file, true); PrintStream printStream = new PrintStream(fos); //.... etc } catch(....) { // .... } </code></pre> <p><strong>Edit:</strong><br> To apply this to your posted code above, do something like so:</p> <pre><code> public static PrintStream showSaveDialog() { JFileChooser chooser = new JFileChooser(); FileNameExtensionFilter filter = new FileNameExtensionFilter( "Tekst filer", "txt"); chooser.setFileFilter(filter); int returnVal = chooser.showSaveDialog(null); try { if (returnVal == JFileChooser.APPROVE_OPTION) { // ******* note changes below ***** File file = chooser.getSelectedFile(); FileOutputStream fos = new FileOutputStream(file, true); return new PrintStream(fos); } else { return null; } } catch (FileNotFoundException e) { JOptionPane.showMessageDialog(null, "Ugyldig Fil!", "error", JOptionPane.ERROR_MESSAGE); } return null; } </code></pre> <p>The crux would be these lines here:</p> <pre><code> File file = chooser.getSelectedFile(); FileOutputStream fos = new FileOutputStream(file, true); return new PrintStream(fos); </code></pre> <p>The true in the FileOutputStream constructor creates a FileOutputStream that appends to the existing file. Please check out the FileOutputStream API for the details on this.</p>

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