I want to join two jpg images in java?

[Comp Expert]

I want to join or concatenate two images(jpg) in java, can anyone
tell me.........

[RO86]

1- You need to read the image in an array ( read Red, Green, and blue components)
public int[][] imreadRed(String path)
{
// * Buffered Image
BufferedImage bi ;
// * Raster
Raster r = null;
// * Image array
int [][] image;
// * Image Width
int imageWidth = 0;
// * Image Height
int imageHeight = 0;

try {
bi = ImageIO.read(new File(path));
r = bi.getData();
int[] color = new int[3];
r.getPixel(0, 0, color);
imageWidth = bi.getWidth();
imageHeight = bi.getHeight();
} catch (IOException e) {
e.printStackTrace();
}
image = new int[imageHeight][imageWidth];
for(int i=0; i <imageHeight;i++)
for(int j=0; j<imageWidth ; j++)
{
int[] color = new int[3];
r.getPixel(j,i, color);
image[i][j] = color[0];
}
return image;
}

public int[][] imreadGreen(String path)
{
// * Buffered Image
BufferedImage bi ;
// * Raster
Raster r = null;
// * Image array
int [][] image;
// * Image Width
int imageWidth = 0;
// * Image Height
int imageHeight = 0;

try {
bi = ImageIO.read(new File(path));
r = bi.getData();
int[] color = new int[3];
r.getPixel(0, 0, color);
imageWidth = bi.getWidth();
imageHeight = bi.getHeight();
} catch (IOException e) {
e.printStackTrace();
}
image = new int[imageHeight][imageWidth];
for(int i=0; i <imageHeight;i++)
for(int j=0; j<imageWidth ; j++)
{
int[] color = new int[3];
r.getPixel(j,i, color);
image[i][j] = color[1];
}
return image;
}

public int[][] imreadBlue(String path)
{
// * Buffered Image
BufferedImage bi ;
// * Raster
Raster r = null;
// * Image array
int [][] image;
// * Image Width
int imageWidth = 0;
// * Image Height
int imageHeight = 0;

try {
bi = ImageIO.read(new File(path));
r = bi.getData();
int[] color = new int[3];
r.getPixel(0, 0, color);
imageWidth = bi.getWidth();
imageHeight = bi.getHeight();
} catch (IOException e) {
e.printStackTrace();
}
image = new int[imageHeight][imageWidth];
for(int i=0; i <imageHeight;i++)
for(int j=0; j<imageWidth ; j++)
{
int[] color = new int[3];
r.getPixel(j,i, color);
image[i][j] = color[2];
}
return image;
}

2- After reading the 2 iages matrix foramt one big array and use this method to write the image
public void imwrite(int [][] image,String path)
{
BufferedImage bi;
int imageWidth;
int imageHeight;
imageWidth = image[0].length;
imageHeight = image.length;
bi = buildImage(image);
File f2 = new File(path);
try {
ImageIO.write(bi, "jpg", f2);
} catch (IOException e) {
e.printStackTrace();
}
}