Byte Array to Image object

Question

I am given a byte   array in Java which contains the bytes for an image  and I need to output it into an image  How would I go about doing this   Much thanks

User · Answer

Since it sounds like you already know what format the byte   array is in  e g  RGB  ARGB  BGR etc   you might be able to use BufferedImage setRGB       or a combination of BufferedImage getRaster   and WritableRaster setPixels      or WritableRaster setSamples       Unforunately both of these methods require you transform your byte   into one of int    float   or double   depending on the image format

User · Answer

If you know the type of image and only want to generate a file  there s no need to get a BufferedImage instance   Just write the bytes to a file with the correct extension   try  OutputStream out   new BufferedOutputStream new FileOutputStream path          out write bytes

User · Answer

From Database  Blob blob   resultSet getBlob  pictureBlob                   byte    data   blob getBytes  1    int   blob length      BufferedImage img   null  try   img   ImageIO read new ByteArrayInputStream data      catch  IOException e        e printStackTrace      drawPicture img        void drawPicture Image img

User · Answer

According to the Java docs  it looks like you need to use the MemoryImageSource Class to put your byte array into an object in memory  and then use Component createImage ImageProducer  next  passing in your MemoryImageSource  which implements ImageProducer

User · Answer

BufferedImage img   ImageIO read new ByteArrayInputStream bytes

[java] Byte Array to Image object

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