Button Event Help

Question

Hi, I have created a Frame that the user can draw in. It is a separate class that I call in my main program from a different file. I have a button on my frame that I want to run a method to save the graphical contents of the frame as a type Image. This works fine, and I have created the image. Now I need to return the image to my main program somehow. I want it only to return to my main when the button is pressed. The actionPerformed cannot contain a return statement, and I cannot call a getImage (from the frame) in my main anyway, because I want it to be initiated by the button push, which is located in the Frame file and not in the main. Can anyone help me? I will post the code. Ignore the Picture and InterruptedException in my actionPerformed class, they just convert the image in other classes, but they're not important. An explanation to return the image would be perfect.
Here is my main:
class LoadPictures
    public static void main (String [] args) throws IOException, InterruptedException, AWTException
        PaintArea pa = new PaintArea ();
        pa.loadArea (pa);
Picture pic= pa.getPic() //<---false method. This is what I want to happen when you click the button in the frame.
    }}Here is my frame, entitled PaintArea:
import java.awt.*;
import java.awt.event.*;
import java.io.*;
class PaintArea extends Frame
    static int x, y;
    static Graphics g;
    PaintArea ()
        addWindowListener (new WindowAdapter ()
            public void windowClosing (WindowEvent e)
                hide ();
        setSize (400, 400);
        setVisible (true);
        g = getGraphics ();
    public void loadArea (PaintArea pa)
        Button button = new Button ("Save");
        // pa.add (button);
        button.setSize (2, 2);
        pa.show ();
        final PaintArea pa2 = pa;
        button.addActionListener (new ActionListener ()
            public void actionPerformed (ActionEvent ae)
                try
                    Image image = pa2.saveScreen (pa2);
                    //Picture pic = new Picture (pa2);
                catch (AWTException e)
                    System.err.println (e);
                    System.exit (1);
                // catch (InterruptedException ie)
                //     System.err.println (ie);
                //     System.exit (1);
        pa.addMouseListener (new MouseAdapter ()
            public void mousePressed (MouseEvent me)
                x = me.getX ();
                y = me.getY ();
                g.fillOval (x - 5, y - 5, 10, 10);
        pa.addMouseMotionListener (new MouseMotionAdapter ()
            public void mouseDragged (MouseEvent me)
                x = me.getX ();
                y = me.getY ();
                g.fillOval (x - 5, y - 5, 10, 10);
    public Image saveScreen (PaintArea pa) throws AWTException
        Image image = createImage (new Robot ().createScreenCapture (pa.getBounds ()).getSource ());
        return image;
}Thank you very much, everyone!!

Answer 1

When you open the frame, use wait() to suspend action in the main program. When the button is pressed, call notify() on the same object. Then the focus is back in the main program's code.