I am writing a swing application that has a main application frame,
plus up to three additional frames that it creates. In my main
frame, I have a JTextArea, and I would like to append text from
any of the other three frames into this text area. Here are some
code fragments:
========================================================================
class SubFrame extends JFrame implements ActionListener {
public SubFrame() {
// construct sub frame
}
public void actionPerformed(ActionEvent e) {
if (some_action) {
//
// append some text to outputText of MainFrame
// This is where I need help!
//
}
}
}
class MainFrame extends JFrame implements ActionListener {
JTextArea outputText;
JScrollPane outputPanel;
public MainFrame() {
//
// create the output text area
//
outputText = new JTextArea(6, 20);
outputPanel = new JScrollPane(outputText);
getContentPane().add(outputPanel, BorderLayout.SOUTH);
}
public void actionPerformed(ActionEvent e) {
if (some_action) {
subFrame = new SubFrame();
subFrame.setVisible(true);
}
}
}
========================================================================
My question is, how do I reference "outputText" from the SubFrame class?
I tried MainFrame.outputText.append(), but that didn't work. Do I need
to write a method of MainFrame, or can I simply reference outputText
somehow outside of MainFrame?
Any help would be appreciated.
Rich
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