Table of Contents
In this article, we will see how to convert byte array to BufferedImage in java.
💡 Outline
To convert byte array to BufferedImage, you can use below code:
Convert byte array image to BufferedImage in java
Using ByteArrayInputStream
Here are steps to convert byte array to BufferedImage in java.
- Create
ByteArrayInputStreamobject by passingbyte[]in the constructor. - Pass above
InputStreamtoImageIo.read()and getBufferedImagefrom it.
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package org.arpit.java2blog; import javax.imageio.ImageIO; import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import java.nio.file.Path; import java.nio.file.Paths; public class ByteArrayToBufferedImageMain { public static void main(String[] args) throws IOException { Path source = Paths.get("MyFile.png"); BufferedImage bufferedImage = ImageIO.read(source.toFile()); byte[] byteArr = getByteArrayForImage(bufferedImage); BufferedImage bufferedImageNew = convertByteArrayToBufferedImage(byteArr); System.out.println(bufferedImageNew); } // convert byte[] to a BufferedImage public static BufferedImage convertByteArrayToBufferedImage(byte[] byteArr) throws IOException { InputStream is = new ByteArrayInputStream(byteArr); BufferedImage bufferedImage = ImageIO.read(is); return bufferedImage; } // Get byte array from input file public static byte[] getByteArrayForImage(BufferedImage bufferedImage) throws IOException { ByteArrayOutputStream baos = new ByteArrayOutputStream(); ImageIO.write(bufferedImage, "png", baos); byte[] bytesArr = baos.toByteArray(); return bytesArr; } } |
Output:
BufferedImage@5bfbf16f: type = 5 ColorModel: #pixelBits = 24 numComponents = 3 color space = java.awt.color.ICC_ColorSpace@150c158 transparency = 1 has alpha = false isAlphaPre = false ByteInterleavedRaster: width = 500 height = 500 #numDataElements 3 dataOff[0] = 2
Using BufferedImage’s setData
Above approach may not work in some case and may return null.
You can follow below steps to use this method as per this stackoverflow thread.
- Create a blank image
- Transform byte array to Raster and use setData to fill the image
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// convert byte[] to a BufferedImage public static BufferedImage convertByteArrayToBufferedImage(byte[] byteArr) throws IOException { BufferedImage bufferedImage=new BufferedImage(10, 10, BufferedImage.TYPE_INT_BGR); Raster raster = Raster.createRaster(bufferedImage.getSampleModel(), new DataBufferByte(byteArr, byteArr.length), new Point()); bufferedImage.setData( raster); return bufferedImage; } |
That’s all about how to convert byte array to BufferedImage in java.
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