Convert Byte array to an Icon

Question

I have a byte array that comes as a result of doing a get to a method called "getFoto()". Now my question is how to convert this array of bytes into an image, to set this image to a specific JLabel.

       InputStream myInputStream = new ByteArrayInputStream(t.getFoto()); 
         BufferedImage someImage;
        try {
            someImage = ImageIO.read(myInputStream);
            Icon icon = new ImageIcon(someImage);
            portada.setIcon(icon);
        } catch (IOException ex) {
            Logger.getLogger(VeryModificarTrailers.class.getName()).log(Level.SEVERE, null, ex);
        }
        }

portada.setIcon((Icon) Imagen; is not working

Hovercraft Full Of Eels · Accepted Answer · 2020-06-08T02:14:16.263

1

A BufferedImage is not an Icon, and so casting will never magically convert it into one. Instead you need to create an ImageIcon first from the image:

BufferedImage someImage = ImageIO.read(something);
Icon icon = new ImageIcon(someImage);
someJLabel.setIcon(icon);

You can also pass the byte array directly into the ImageIcon constructor as this will work too

edited Jun 08 '20 at 02:14

answered Jun 08 '20 at 01:49

Hovercraft Full Of Eels

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in `BufferedImage someImage = ImageIO.read(something); Icon icon = new ImageIcon(someImage); someJLabel.setIcon(icon);` when you put "something" it should be the byte array? – Shean98 Jun 08 '20 at 01:55
@Shean98: no, ImageIO requires an InputStream or a File. A ByteInputStream should be adequate. – Hovercraft Full Of Eels Jun 08 '20 at 01:56
I put what you told me and it keeps giving error, I will edit the post so you can see it – Shean98 Jun 08 '20 at 02:03
Wait, what error? You've not posted any error message – Hovercraft Full Of Eels Jun 08 '20 at 02:08
Sorry i forgot to put it, its a nullPointerException error in the instruction: `Icon icon = new ImageIcon(someImage);` – Shean98 Jun 08 '20 at 02:12
@Shean98 have you tested to see what is null? Before posting this question? – Hovercraft Full Of Eels Jun 08 '20 at 02:13
Your image is likely null, and now you need to debug to find out why. – Hovercraft Full Of Eels Jun 08 '20 at 02:13
Also, that line is not likely the one that throws the NullPointerException. Better check again. – Hovercraft Full Of Eels Jun 08 '20 at 02:22

Convert Byte array to an Icon

1 Answers1