Thread: Image to file and contra

Is there any way to write an array of images into file ( for example text file) and read them from file (in Java of course).

Yes. You can write images to a file, by concatenating one after the other. I think you'd need a record length field to keep track of each separate image.
Why do you want them in a text file? Images are composed of binary data that is useless to view in a text editor.
If you need to convert the bytes of the images to text, look at Base64 encoding.

I am making project and its GUI needs to show some images (that can be changed in program) and then I want to save them back. Saving images in folder "Images" and something like that will make things more difficult (difficulties with picture names etc...) I use the following program:

[highlight]
BufferedImage image=ImageIO.read(new File(legal file path));
 
ByteArrayOutputStream baos=new ByteArrayOutputStream();
        ImageIO.write(image, "jpg", baos);
        byte[] bitii=baos.toByteArray();
        FileOutputStream f=new FileOutputStream(new File(legal file path));
        f.write(biti);
 
[/highlight]

Yesterday it did not work properly, today it works norm can I use a hint of placing 1 or more empty lines between two different images and then read first one until I reach empty line and so on?

Or use a ZipOutputStream and write the images as separate ZipEntries to a ZipFile.

db

Thanks for advices.

I have also found Base64 encoder and decoder at Encode/Decode to/from Base64 - Real's Java How-to and downloaded java mail from https://cds.sun.com/is-bin/INTERSHOP...-CDS_Developer
and how can I add this classes ( something like library) to be used in my project .
I tried to add this one to bootstrap entries (I am using Eclipse) but import of javax.mail.internet.MimeUtility is not recognized yet ?

Why do you want the image's bytes to be output to a text file? Is this a student exercise to see how to do something?

Sorry, I have no idea how to configure your IDE.

I am doing Java project in which each user should have its own picture that can be changed and I have to save these changes Since there can be many many users it can become a little bit difficult to deal with all these pictures and I wanted to write them in just one tex file but I have forsaken this idea (because it is a little bit complicated and I do not have too much time now to deal with all these conversions + javax.mail.internet.MimeUtility not recognized and so on) and will save each image separately in one folder.

You still haven't explained why you want to use a TEXT file. If that requirement is not part of some learning assignment, it's a downright stupid approach.

db

Darryl.Burke I think that you have not read my first post carefully I wrote : for example text file It can be any type of file but aim is to have just one file instead of many pictures. I am also sure that it will increase my project points and of course I want to learn how to do this (not just for project points).

user should have its own picture that can be changed and I have to save these changes

How will the images be changed if they are all in one file? To change any one image in the file, you will have to write out the file with all of the images.

norm When program starts, it reads all of images from file Then a frame containing combo box for name selection is drawn. And if for example John Norm is selected then panel containing his picture and some infos is shown. We can change a picture that is shown and when we close application all these pictures should be saved back into file from which they were read.

Thanks for post.