jfilechooser

问题 I trying to save my contact in my table but filechosser always setit to all file. is there way I can set it to accept .txt only and make it default or the only option. savecontact.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JFileChooser filesave = new JFileChooser(); int returnVal = filesave.showSaveDialog(Main.this); if (returnVal == JFileChooser.APPROVE_OPTION) { try { File file = filesave.getSelectedFile(); PrintWriter os = new PrintWriter(file);

问题 I extended a JFileChooser and overrode the approveSelection method so that when a user chooses an invalid directory and then clicks on the Open button, an error message in a JOptionPane will be displayed. But I want to make my JFileChooser more user-friendly and make the Open button become disabled when a user clicks on an invalid directory and then become re-enabled when a user clicks on a valid directory. Is it possible to customize my JFileChooser even further and get access to the Open

问题 I have a method in my application called "Save as" which Saves the image of my application on computer my into a file. I used the JFileChooser to let the users choose their desired location for saving the file. The problem is unless user explicitly types in the file format, it saves the file with no extension. How can I have formats like jpg, png in the File Type drop down menu. and, how can i get extension from the File Type drop menu for saving my image file. ImageIO.write(image,extension

问题 I would like my JFileChooser to start in details view, instead of the "List" view that it starts in. How do you do that? 回答1: You can get the Action from the ActionMap: JFrame frame = new JFrame(); JFileChooser fileChooser = new JFileChooser("."); Action details = fileChooser.getActionMap().get("viewTypeDetails"); details.actionPerformed(null); fileChooser.showOpenDialog(frame); 回答2: This is a little tricky and probably not officially supported, but I found out how to do this. First, you need

问题 In a GUI app that I am working on, I require to select multiple files but instead of directly opening it with the File chooser I first need to add all required files in a Selected list (so that instead of selecting files again and again from different directories I can select them all at a time and then open all the files added to that list). Moreover I should also be able to remove multiple files from those present in that Selected File list too. Is that possible with JFileChooser or do I

问题 I wanted to create a JFileChooser with thumbnail view of image files.So I subclassed FileView and in the method which creates ImageIcon did some scaling sothat thumbnail images are shown. However,the overall effect is that, the filechooser widget takes some time before opening a directory and showing thumbnails..In createImageIcon() below,I need to call new ImageIcon() twice-once with the image filepath and next with the resized image as constructor argument.I think this is what slows the

问题 I was just wondering: how does Gmail use the Windows/Mac file chooser to upload files? Is there any way to do this in Java ? Personally, I don't like the way that the JFileChooser looks like, and I thought it would be better for my users to be able to use something that they're more used to. Tips anyone? 回答1: Use the old java.awt.FileDialog instead: new java.awt.FileDialog((java.awt.Frame) null).setVisible(true); 回答2: You can try using JFileChooser but setting the look and feel to be the

问题 I would like to be able to control the appearance of the JFileChooser . In particular I would like to save how the JFileChooser was displayed when it was last shown. I would like to save whether it was used in details/list view and which column (eg, size or date modified) the lists were sorted. I know there is a lot of questions about JFileChooser but I have not been able to find what I am looking for. Thanks EDIT: it was suggested as an answer, but keeping a reference of the filechooser is

问题 I think that the reason why my paintComponent is not working because I placed the image as a JLabel in a JPanel. I want to use drawRect to draw a rectangle when I click using the MouseListener. My image is a BufferedImage from JFileChooser JFileChooser fileChooser = new JFileChooser(); fileChooser.setFileSelectionMode (JFileChooser.FILES_AND_DIRECTORIES); if (fileChooser.showOpenDialog(panelPic) == JFileChooser.APPROVE_OPTION) { try { pic = ImageIO.read(fileChooser.getSelectedFile()); /

问题 In the code below, for various rows of same table, I am trying to set an Editable comboBox as editor for first row ( so that the user can select from the available choices or type its own), a filechooser for second row and the default textFiled for the rest of rows. The Problem: and steps to reproduce it: 1- Run the code, 2- click on second row and choose a folder (the row turns yellow) 3- now click on first row to select the type of movie (just click , no need to type anything or to choose)