Java JTable shortcuts not working

问题

It's my first time using a JTable and I'm having a problem. I have been testing my JTable with a main method like this :

public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                JFrame f = new JFrame(APP_TITLE);
                f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                FileManager fileManager = new FileManager();
                f.setContentPane(fileManager);

                f.setIconImage(Icons.SOFTWARE_ICON.getImage());

                f.pack();
                f.setLocationByPlatform(true);
                f.setMinimumSize(f.getSize());
                f.setVisible(true);
            }
        });
    }

And everything works perfectly. I'm able to press the shortcuts (UP, DOWN and CTRL+A) and they all work.

But now I've been adding the FileManager (JPanel) to my UI (JFrame) like this :

public FileManager fMan = new FileManager();

[...]

JSplitPane splitPane = new JSplitPane();

splitPane.setLeftComponent(fMan);

And now, I noticed two things :

The shortcuts aren't working
The colors aren't automatically inverted on selection

I tried requesting the focus, changing the theme, and neither helped. 🤔

回答1:

After over 5 hours of trying to fix this, I finally can proudly say I HAVE FOUND THE ANSWER!

A subclass used this code :

KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(new KeyEventDispatcher() {

            @Override
            public boolean dispatchKeyEvent(KeyEvent ke) {
            }

        });

And it is causing the JTable to not receive the imputs properly.

Oh well! :)

来源：https://stackoverflow.com/questions/47162625/java-jtable-shortcuts-not-working

标签

java

swing

jtable

shortcut