WriteInt-RandomAccessFile - java

Question

i am trying to write a program in java (on linux) using RandomAccessFile class for writing to files.

for some really weird reason it is not working. the most simplest code does not work. when try to use:

RandomAccessFile file = new RandomAccessFile("a.txt", "rw");
file.writeInt(3);
file.close();

it ether leaves the file blank or fills it with gibrish

i assume it has to do with some encoding issue i am not familiar with.

any one have any thoughts about it?

thank you

Answer 1

It simply writes a 32-bit integer to the file (in your case it is the bytes sequence 00 00 00 03). If you want to write it as a string, you need to

    RandomAccessFile file = new RandomAccessFile("a.txt", "rw");
    file.writeBytes(Integer.toString(3));
    file.close();

Answer 2

You would be best served going thru a tutorial like this one to learn how to use random access files

http://www.java-tips.org/java-se-tips/java.io/how-to-use-random-access-file.html