Problem in writing image

Question

Hi,
I have a problem in writing png.
Here's my code:
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.image.RenderedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
public class ProvaImg extends JPanel{
     private static JFrame frame;
      * @param args
     public static void main(String[] args) {
          frame = new JFrame ();
          frame.setSize(100,100);
          ProvaImg pi=new ProvaImg();
          frame.add(pi);
          frame.setVisible(true);
          //PROBLEM HERE
          frame.setVisible(false);
     public ProvaImg(){
          super();
         // Returns a generated image.
         public void paintComponent(Graphics g) {
             int width = 100;
             int height = 100;
             // Create a buffered image in which to draw
             BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
             Graphics2D g2d=(Graphics2D)g;
             // Create a graphics contents on the buffered image
              g2d = bufferedImage.createGraphics();
             // Draw graphics
             g2d.setColor(Color.white);
             g2d.fillRect(0, 0, width, height);
             g2d.setColor(Color.black);
             g2d.fillOval(0, 0, width, height);
             // Graphics context no longer needed so dispose it
             g2d.dispose();
              try {
                  // Save as PNG
                  File file = new File("newimage.png");
                  System.out.println("png");
                  ImageIO.write(bufferedImage, "png", file);
              } catch (IOException e) {
     }If I comment line after
//PROBLEM HERE
it works, otherwise no.
Is there a possibility to close panel when image has been written?
Thanks in advance
Bye

Answer 1

No,
I try to explain better:
In my real application (not this simple example) I compose an image by the union of many little gifs. Then I have to save the result in a unique image. It's for this that I've overridden paintComponent(), so , after having painted all gifs, I save composite image to a png one.
This function is activated from a main application, and I don't want to show too much to user, so I try to make this by using a popup frame that disappear quickly.
I hope to having been as clear as possible.
I hope to have chosen the best solution too
Bye and thanks
Edited by: giuseppe_italiano on Nov 21, 2007 3:35 AM