Right use of file reading ?

Code:

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                FileInputStream in = new FileInputStream("C:\\andmed.txt");
               
                final int BUFFER_SIZE = 8;
                int off = 0;
                int actualBytesRead = 0;
                byte[] buffer = new byte[BUFFER_SIZE];
               
                while ((actualBytesRead = in.read(buffer, 0, BUFFER_SIZE)) != -1) {
                        off += actualBytesRead -1;
                        System.out.println(Arrays.toString(buffer));
                }

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What are you trying to do?
What kind of data is in the andmed.txt file? character?

What is being printed? Is it what you want?

Reading binary and text files. I mostly used for reading files like this

Code:

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                while ((byte = in.read()) != -1) {
                        System.out.println(byte);
                }

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But i though this is waste of resources, reading byte by byte

Then read them a bunch at a time as your were:
in.read(buffer, 0, BUFFER_SIZE)

What are you trying to do?