JTextArea new line on shift + enter

Question

I\'ve added a keylistener to my JTextArea field, but it doesn\'t behave as I expected.

inputTextArea.addKeyListener(new KeyAdapter() {
public void keyPressed(Key         


        

Answer 1

Instead of doing the actions immediately on receiving the event, sequence them for later by posting them using SwingUtilities.invokeLater(). The code should look like:

if(k.isShiftDown()) {
   SwingUtilities.invokeLater(new Runnable() {
      public void run() {
         inputTextArea.append(" \n");
      }
   });
} else {
   SwingUtilities.invokeLater(new Runnable() {
      public void run() {
          //rest of the else body here
      }
   });

}

In my opinion, the problems seen here are because application-defined actions and internal actions are not being properly sequenced, leading to repaints happening before the text has been modified.