Java image and byte[] for J2ME and J2SE

[Alex Parvan]

Hello,

What i want is this:
1. Convert Image object to byte[] in J2ME application
2. Send it to Web Service (store it in database)
3. Read byte[] in J2SE application, convert it back to Image

If in step 1 i use J2SE, then everything is working great. Is there a 3rd party class that can be used to convert image-to-byte[] and back ? Or maybe another option.

Thanks,
Alex

[lokesh jain]

hi, please visit any of these 3 links :

webpage


webpage2

webpage3

Hope so that these links will help you

[Alex Parvan]

Thank you, i did it.

If anyone else needs something like this, here is the complete code:
Image to byte[] (only for J2ME):

import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import javax.microedition.lcdui.Image;

public class ImageToByteArray {
    
    public static byte[] getByteArray(Image img) {
        byte[] bytes = null;
        int width = img.getWidth();
        int height = img.getHeight();
        int[] pixels = new int[width * height];
        img.getRGB(pixels, 0, width, 0, 0, width, height);

        try {
            // convert int[] to byte[]
            ByteArrayOutputStream bout = new ByteArrayOutputStream();
            DataOutputStream dout = new DataOutputStream(bout);
            // I suggest writing these first: you'll need them to convert back
            dout.writeInt(width);
            dout.writeInt(height);
            // then the pixels
            for (int i = 0; i < pixels.length; i++) {
                dout.writeInt(pixels[i]);
            }
            bytes = bout.toByteArray();
        } catch (IOException e) {
            e.printStackTrace();
        }

        return bytes;
    }
}

byte[] to Image (only for J2SE):

import java.awt.Image;
import java.awt.Toolkit;
import java.awt.image.MemoryImageSource;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;

public class ByteArrayToImage {

    public static Image getImage(byte[] bytes) {
        Image image = null;
        try {
            ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
            DataInputStream dis = new DataInputStream(bais);
            int w = dis.readInt();
            int h = dis.readInt();
            int[] pixels = new int[w * h];
            for (int i = 0; i < pixels.length; i++) {
                pixels[i] = dis.readInt();
            }
            image = Toolkit.getDefaultToolkit().createImage(new MemoryImageSource(w, h, pixels, 0, w));
        } catch(IOException e) {
            e.printStackTrace();
        }

        return image;
    }
}