Convert a component to a BMP-file

Hello!
I�ve tried to convert my component where I have a chart drawn to a bmp-format file. I have picked part of the code from a Sun help page. This is how it looks:
//first my lines
Image image = component.createImage(component.getWidth(),
component.getHeight());
Graphics g = image.getGraphics();
Graphics2D g2d = (Graphics2D) g;
component.paint(g2d);
//then Suns lines
ParameterBlock pb = new ParameterBlock();
pb.add(image);
PlanarImage tPlanarImage =
(PlanarImage) JAI.create("awtImage", pb);
//Then, write out the PlanarImage (for example, in BMP format):
try {
OutputStream tOutput =
new FileOutputStream(fileName);
ImageEncoder tEncoder =
ImageCodec.createImageEncoder("BMP",tOutput,null);
tEncoder.encode(tPlanarImage);
tOutput.close();
catch (IOException ex) {
Error message is:
java.lang.RuntimeException: All samples must have the same size.
at com.sun.media.jai.codecimpl.BMPImageEncoder.encode(BMPImageEncoder.java:134)
If some one could help me out I would be very grateful.
Best Regards
Staffan

Thanks for Your advice. I�ll then think I had to change to Java 5.0.
Best Regards
Staffan

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Hi opalo,
this code may help you...
import java.awt.*;
import java.io.*;
import java.awt.image.*;
import javax.imageio.ImageIO;
class Write1 extends Component {
//--- Private constants
private final static int BITMAPFILEHEADER_SIZE = 14;
private final static int BITMAPINFOHEADER_SIZE = 40;
//--- Private variable declaration
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private byte bitmapFileHeader [] = new byte [14];
private byte bfType [] = {'B', 'M'};
private int bfSize = 0;
private int bfReserved1 = 0;
private int bfReserved2 = 0;
private int bfOffBits = BITMAPFILEHEADER_SIZE + BITMAPINFOHEADER_SIZE;
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private byte bitmapInfoHeader [] = new byte [40];
private int biSize = BITMAPINFOHEADER_SIZE;
private int biWidth = 50;
private int biHeight = 70;
private int biPlanes = 1;
//private int biBitCount = 24;
private int biBitCount = 1;
private int biCompression = 0;
private int biSizeImage = 0x030000;
private int biXPelsPerMeter = 0x0;
private int biYPelsPerMeter = 0x0;
private int biClrUsed = 0;
private int biClrImportant = 0;
//--- Bitmap raw data
private int bitmap [];
//--- File section
private FileOutputStream fo;
//--- Default constructor
public Write1() {
public void saveBitmap (String parFilename, Image parImage, int
parWidth, int parHeight) {
try {
fo = new FileOutputStream (parFilename);
save (parImage, parWidth, parHeight);
fo.close ();
catch (Exception saveEx) {
saveEx.printStackTrace ();
* The saveMethod is the main method of the process. This method
* will call the convertImage method to convert the memory image to
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* the bitmap file header; writeBitmapInfoHeader creates the
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private void save (Image parImage, int parWidth, int parHeight) {
try {
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writeBitmapFileHeader ();
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catch (Exception saveEx) {
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bitmap, 0, parWidth);
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pg.grabPixels ();
catch (InterruptedException e) {
e.printStackTrace ();
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bfSize = biSizeImage + BITMAPFILEHEADER_SIZE +
BITMAPINFOHEADER_SIZE;
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biHeight = parHeight;
return (true);
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int size;
int value;
int j;
int i;
int rowCount;
int rowIndex;
int lastRowIndex;
int pad;
int padCount;
byte rgb [] = new byte [3];
size = (biWidth * biHeight) - 1;
pad = 4 - ((biWidth * 3) % 4);
if (pad == 4) // <==== Bug correction
pad = 0; // <==== Bug correction
rowCount = 1;
padCount = 0;
rowIndex = size - biWidth;
lastRowIndex = rowIndex;
try {
for (j = 0; j < size; j++) {
value = bitmap [rowIndex];
rgb [0] = (byte) (value & 0xFF);
rgb [1] = (byte) ((value >> 8) & 0xFF);
rgb [2] = (byte) ((value >> 16) & 0xFF);
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if (rowCount == biWidth) {
padCount += pad;
for (i = 1; i <= pad; i++) {
fo.write (0x00);
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fo.write(b);
rowCount = 1;
rowIndex = lastRowIndex - biWidth;
lastRowIndex = rowIndex;
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rowCount++;
rowIndex++;
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bfSize += padCount - pad;
biSizeImage += padCount - pad;
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wb.printStackTrace ();
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fo.write (bfType);
fo.write (intToDWord (bfSize));
fo.write (intToWord (bfReserved1));
fo.write (intToWord (bfReserved2));
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wbfh.printStackTrace ();
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retValue [1] = (byte) ((parValue >> 8) & 0x000000FF);
retValue [2] = (byte) ((parValue >> 16) & 0x000000FF);
retValue [3] = (byte) ((parValue >> 24) & 0x000000FF);
return (retValue);
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     public static void main(String args[])
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System.err.println ("Unable to write to file");
System.exit(-1);
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