How to convert hexString to jpeg ?

Question

hi everyone,
I want to convert hexstring to an image(jpeg format ). First I converted hex to byte and then byte to BufferedImage but it dosent work.

Answer 1

public boolean convertHexToByte(String img){
byte[] b=new byte[img.length()/2];
int i;
try{
  for(i=0;i<=img.length()/2 -1;i++)  {
      b=(byte)Integer.parseInt(img.substring(2*i, 2*i+2), 16);
PoliceImage=convertByteToImage(b);
return true;
catch(Exception ex){
return false;
public BufferedImage convertByteToImage(byte[] b ) throws IOException{
try {
int w = 2;
int h = 2;
ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
int[] nBits = {8};
ColorModel cm = new ComponentColorModel(cs, nBits, false, true, Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
SampleModel sm = cm.createCompatibleSampleModel(w, h);
DataBufferByte db = new DataBufferByte(b, w * h);
WritableRaster raster = Raster.createWritableRaster(sm, db, null);
BufferedImage bm = new BufferedImage(cm, raster, false, null);
return bm;
} catch (Exception ex) {
Logger.getLogger(PoliceCard.class.getName()).log(Level.SEVERE, null, ex);