Java.io.RandomAccessFile.read() Method

Description

The java.io.RandomAccessFile.read() method reads a byte of data from this file. The byte is returned as an integer in the range 0 to 255 (0x00-0x0ff)..

Declaration

Following is the declaration for java.io.RandomAccessFile.read() method

public int read()

Parameters

• NA

Return Value

This method returns the next byte of data, or -1 if the end of the file has been reached.

Exception

• IOException -- if an I/O error occurs.Not thrown if end-of-file has been reached.

Example

The following example shows the usage of java.io.RandomAccessFile.read() method.

package com.tutorialspoint;

import java.io.*;

public class RandomAccessFileDemo {

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

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

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

         // read the first byte and print it
         System.out.println("" + raf.read());

         // set the file pointer at 4rth position
         raf.seek(4);

         // read the first byte and print it
         System.out.println("" + raf.read());
      } catch (IOException ex) {
         ex.printStackTrace();
      }

   }
}

Assuming we have a text file c:/test.txt, which has the following content. This file will be used as an input for our example program:

ABCDE  

Let us compile and run the above program, this will produce the following result:

0
108