Save a panel with a graphic into a bmp file

Question

I need to save a panel with a draw to a bmp file or a jpeg file, but I don't know which classes and methods I have to use.
Thank for your help.

Answer 1

Sorry, made an incomplete posting!!
Here's all the code, hope it helps!
  public Image getScreenshot()
       double scale = 0.67;
          BufferedImage result = new BufferedImage( this.getWidth(), this.getHeight(), BufferedImage.TYPE_4BYTE_ABGR );
          Graphics2D g = (Graphics2D)result.getGraphics();
//          g.scale( scale, scale );
          paintAll( g );
          // Crop image
       result = result.getSubimage( m_borderThickness,
                                                                              m_borderThickness,
                                                                              m_width-m_borderThickness,
                                                                              m_height-m_borderThickness
       // Save as JPG
          String fname = "D:\\temp\\test4.jpg";
          try{
               FileOutputStream out = new FileOutputStream( fname );
               JPEGEncodeParam param = JPEGCodec.getDefaultJPEGEncodeParam( result );
               param.setQuality( 1, false ); // use maximum quality
               JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder( out );
               encoder.encode( result );
               out.close();
          } catch( IOException e ) {
                    e.printStackTrace();
                    throw new Error( "Could not save " + fname + " with JPEGImageEncoder" );
          // Load and Re-Scale JPG
          Image img = new ImageIcon( fname ).getImage();
          return result.getScaledInstance( (int)(result.getWidth() * scale),
                                                                                        (int)(result.getHeight() * scale),
                                                                                         //Image.SCALE_DEFAULT
                                                                                        Image.SCALE_AREA_AVERAGING
                                                                                        //Image.SCALE_SMOOTH
  }