Convert Byte Array to Image in Java

Java provides ImageIO class for reading and writing an image. To convert a byte array to an image.

• Create a ByteArrayInputStream object by passing the byte array (that is to be converted) to its constructor.

• Read the image using the read() method of the ImageIO class (by passing the ByteArrayInputStream objects to it as a parameter).

• Finally, Write the image to using the write() method of the ImageIo class.

Example

import java.io.ByteArrayOutputStream;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
public class ByteArrayToImage {
   public static void main(String args[]) throws Exception {
      BufferedImage bImage = ImageIO.read(new File("sample.jpg"));
      ByteArrayOutputStream bos = new ByteArrayOutputStream();
      ImageIO.write(bImage, "jpg", bos );
      byte [] data = bos.toByteArray();
      ByteArrayInputStream bis = new ByteArrayInputStream(data);
      BufferedImage bImage2 = ImageIO.read(bis);
      ImageIO.write(bImage2, "jpg", new File("output.jpg") );
      System.out.println("image created");
   }
}

Output

image created