jframe

first of all I must say that I have checked these questions and didn't find my answer : 1 , 2 , 3 , 4 , 5 , 6 , 7 and many other questions like so also I have checked these tutorials and examples: 1 , 9 , 10 , 11 and many other sites. but I couldn't fix my problem. and this is the simple kind of my code: public class Question extends JFrame { public Question() { Dimension d = Toolkit.getDefaultToolkit().getScreenSize(); setLayout(new BorderLayout()); setSize(d.width, d.height); setResizable(false); setDefaultCloseOperation(EXIT_ON_CLOSE); JPanel panel = new JPanel(); panel.setPreferredSize(new

I'm Building a Client/Server application. and I want to to make it easy for the user at the Authentication Frame. I want to know how to make enter -key submits the login and password to the Database (Fires the Action) ? trashgod One convenient approach relies on setDefaultButton() , shown in this example and mentioned in How to Use Key Bindings . JFrame f = new JFrame("Example"); Action accept = new AbstractAction("Accept") { @Override public void actionPerformed(ActionEvent e) { // handle accept } }; private JButton b = new JButton(accept); ... f.getRootPane().setDefaultButton(b); Add an

I have several JPanels in a layout and whenever I change the size of the JFrame manually with my mouse, it stretches the JPanels and makes it look messy. Is there a way to disable this? JPanel is not resizable by the user. If you are referring to JFrame, you can use yourFrame.setResizable(false); It's all about the LayoutManager you are using. Some LayoutManagers like BorderLayout always give extra space to children added in the center position. However, north, south, east, and west only allocated the preferred size to them. My favorite LayoutManager is TableLayout which is extremely easy to

I have a very simple JFrame window that contains one button: No . In the main function I set setVisible(true); my JFrame and in the No button listener I want to close the window so I set the visibility to false: setVisible(false); and after that I do System.exit(0); in order to prevent possible memory leaks when running the program many times. I have two questions: Do I really need to System.exit(0); in the above case? If I have this JFrame as a popup window, I can't really use System.exit(0); because this will terminate the whole program. So how can I properly close the popup window and stay

Is there a way to make sure that a user cannot close or leave my Swing application? I've tried to make it fullscreen, but you can still Alt-Tab away from it—and besides, that doesn't work well when you decide to use JOptionPane's dialogs. So, is there any way to make a user use only this one Java program on a device? Edit: Some people wonder about the purpose. The application is supposed to be sorta "embedded" into the handheld device (which runs under Windows), so the users of the device will use it as we intend it to be used—for example, that they won't play Freecells or do something worse

Is there any difference between the two. I was reading an article ( http://www.javalobby.org/java/forums/t17933 ) about that you should always use System.exit(0); Currently I use JFrame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); The article says that even for a Java Swing Application you should add a listener WindowAdapter and and call System.exit() inside its method windowClosing(WindowEvent e) . Is there any difference? Is one method better then the other? If you look at the JFrame code, it does: protected void processWindowEvent(WindowEvent e) { super.processWindowEvent(e); if (e

I have a JPanel full of JTextFields... for (int i=0; i<maxPoints; i++) { JTextField textField = new JTextField(); points.add(textField); } How do I later get the JTextFields in that JPanel? Like if I want their values with TextField.getText(); Thanks Well bear in mind they didn't get there by them selves ( I think a read some questions about dynamically creating these panels at runtime ) In the answers posted there, someone said you should kept reference to those textfields in an array. That's exactly what you need here: List<JTextField> list = new ArrayLists<JTextField>(); // your code... for