In the given code, we have used RandomAccessFile to write number from 1 to 5 in the text file. The seek ()function displays the the last 3 digits of file.

import java.io.*;

class  RandomAccessFileExample
{
    public static void main(String[] args) 
    {
        try{
        File f=new File("c:/num.txt");
        RandomAccessFile randomFile=new RandomAccessFile(f,"rw");
            for(int i=1;i<=5;i++){
               randomFile.seek(f.length());
               randomFile.writeBytes(Integer.toString(i));
            }
             randomFile.close();
             RandomAccessFile access = new RandomAccessFile(f, "r");
             int i=(int)access.length();
             access.seek(i-3);  
              for(int ct = 0; ct < i; ct++){
              byte b = access.readByte();
              System.out.println((char)b); 
              }
        }
        catch(Exception e){}



}
}