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    <p>I would +1 <a href="https://stackoverflow.com/a/17989811/2634190">Peters answer</a>, but I feel this needs some elaboration.</p> <p>There's absolutely <strong>no need for a while loop or additional threading</strong>. Simply add listeners to your UI components. Here's a very simple example:</p> <pre><code> JButton button = new JButton("This is a button!"); //Add action listener to button button.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { //Perform function when button is pressed System.out.println("You clicked the button"); } }); </code></pre> <hr> <p>You have added the action listener while still keeping the while loop, why? REMOVE the while loop and use the listener.</p> <p>Repeating <a href="https://stackoverflow.com/a/17989811/2634190">Peter</a> again, but <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/index.html" rel="nofollow noreferrer">RTFM</a>. Just <a href="http://docs.oracle.com/javase/tutorial/uiswing/events/index.html" rel="nofollow noreferrer">read the documentation</a>, which provides clear examples. There's no good reason to use that loop.</p> <hr> <p>Your application is not crashing, it's doing exactly what you're telling it to do:</p> <pre><code>public static void main(String[] args){ showMainGui(); while(inBattle == false){ // wait until inBattle changes } } </code></pre> <p>You're saying, WHILE inBattle is false, do nothing, but if inBattle is true, do nothing then end the main function -- What do you expect it to do after you click the button if there's nothing to be done?</p>
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    1. POWait for button press JButton
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    1. COI already have a button with an action listener created in my showMainGui() function. When I use my button, it crashes the application
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    2. COPlease read my original answer again, it's updated.
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