Java IO Tutorial - Java RandomAccessFile.length()

Syntax

RandomAccessFile.length() has the following syntax.

public long length()  throws IOException

Example

In the following code shows how to use RandomAccessFile.length() method.

//  ww w.  j av  a2  s. c o m

import java.io.*;

public class Main {

   public static void main(String[] args) {
      try {
         
         RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

         // write something in the file
         raf.writeUTF("java2s.com Hello World");

         // set the file pointer at 0 position
         raf.seek(0);

         // read and print the contents of the file
         System.out.println(raf.readUTF());

         // print the length of the file
         System.out.println(raf.length());

         // write something more in the file
         raf.writeUTF("This is an example");

         // print the length of the file
         System.out.println(raf.length());
         raf.close();
      } catch (IOException ex) {
         ex.printStackTrace();
      }


   }
}