how to modify a JFrame by another JFrame?

Question

I have two JFrames A, and B. B has a textArea. I want to add some text to that TextArea in B by clicking a button in A. here is my code:

JButton btn = new JButton("Text");
btnButton_1.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        b.textArea.setText("Button clicked");
    }
});
btnButton_1.setBounds(10, 45, 89, 23);
frmA.getContentPane().add(btnButton_1);

b is object of class B
textArea is JTextArea variable name in class B

Try calling `repaint()` in `b` after adding text to the JTextArea — Hans Petter Taugbøl Kragset, Oct 27 '14 at 11:50
don't repaint anythign, for better help sooner post an SSCCE/MCVE short, runnable, compilable — mKorbel, Oct 27 '14 at 11:51
1) See [The Use of Multiple JFrames, Good/Bad Practice?](http://stackoverflow.com/q/9554636/418556) 2) Java GUIs have to work on different OS', screen size, screen resolution etc. As such, they are not conducive to pixel perfect layout. Instead use layout managers, or [combinations of them](http://stackoverflow.com/a/5630271/418556) along with layout padding and borders for [white space](http://stackoverflow.com/a/17874718/418556). — Andrew Thompson, Oct 27 '14 at 22:49

shepard23 · Answer 1 · 2014-10-27T12:34:10.660

0

Use repaint() method of components.

JButton btn = new JButton("Text");
        btnButton_1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                b.textArea.setText("Button clicked");
                b.frameB.repaint();
            }
        });
        btnButton_1.setBounds(10, 45, 89, 23);
        frmA.getContentPane().add(btnButton_1);

edited Oct 27 '14 at 12:34

answered Oct 27 '14 at 11:57

shepard23

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what is repaint() method. doesn't show up when i press (.) ? – user3417593 Oct 27 '14 at 12:02
@user3417593 - please see my updated post. you should repaint the frame itself. – shepard23 Oct 27 '14 at 12:34
i repaint the frame, but same thing doesn't work. I also tried to repaint the textArea. again doesn't work. have you tried this ? – user3417593 Oct 27 '14 at 19:50
@user3417593 - can you post both java codes? but not whole just the gist. – shepard23 Oct 28 '14 at 05:35

how to modify a JFrame by another JFrame?

1 Answers1