如何使用JFrame关闭调用的类而不关闭调用它的类？

Question

I seem to have a fairly unique problem, and I searched for a while for an answer on here without finding one. I have a class that has a simple JFrame with two buttons. Each button calls the Main method of a different class, as such:

checkRuling = new JButton("Check Your Deck's Rulings");
  checkRuling.addActionListener(new ActionListener() {
     public void actionPerformed (ActionEvent e) {
        ReadHtmlCardDatabase.main(null);
     }
  });

One calls a class that takes a series of inputs into a text field and creates a formatted html document from the inputs, and the other loads the html document into a JEditorPane. My problem is that when I close one of the JFrames for the subclasses (either the input or html loader one), it exits my program completely, and I want to keep the main class (with the two buttons) open. I've tried using:

close = new JButton("CLOSE");
     close.addActionListener(new ActionListener() {
        public void actionPerformed (ActionEvent e) {
          System.exit(1);
        }
     });

On a button in the subclasses, to no avail. When the button is clicked it simply exits everything. I've also tried using:

JFrame.DISPOSE_ON_EXIT

For the subclasses, but this causes the JFrames to go away without the subclasses actually closing, so the first one that saves the html document never actually saves it, and the second subclass that opens that same html document won't work, because it wasn't saved. Any help would be appreciated, because I can't figure out how to do this.

Answer 1

As Fast Snail says in the comments, you shouldn't be calling a main method. Instantiate a class that does each functonality. Set the frame to visible using setVisible(true) when you start using it, then setVisible(false) when you're done. So, in the action listener, just change the visibility.

Then, assuming you don't have anything too wild going on, the frame you just set to invisible should go out of scope and get freed so that memory isn't chewed up. You just instantiate a new copy of the ReadHtmlCardDatabase class each time you need one. Or you could have one static copy that you set visible/invisible as needed.

Answer 2

one of the JFrames

You should use only one JFrame in Your GUI. For other windows You can use for example JDialog or JWindow. This should help, if not You can always use frame.setVisible(false) instead of dispose on close, but it' s not very neat.

Answer 3

Thanks to someone who posted a comment and then deleted it, I've figured out my own problem. I just had to replace my main call with this:

setDeck = new JButton("Set Deck");
  setDeck.addActionListener(new ActionListener() {
     public void actionPerformed (ActionEvent e) {
        WriteHtmlCardDatabase w = new WriteHtmlCardDatabase();
        w.main(null);
     }
  });

Thank you!