Java.io.RandomAccessFile.write() Method

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Description

The java.io.RandomAccessFile.write(int b) method writes the specified byte to this file. The write starts at the current file pointer.

Declaration

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

public void write(int b)

Parameters

b − The byte to be written.

Return Value

This method does not return a value.

Exception

IOException − If an I/O error occurs.

Example

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

package com.tutorialspoint;

import java.io.*;

public class RandomAccessFileDemo {
   public static void main(String[] args) {
   
      try {
         int b1 = 15;
         int b2 = 20;
         
         // create a new RandomAccessFile with filename test
         RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

         // write an int
         raf.write(b1);

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

         // print the byte
         System.out.println("" + raf.readByte());

         // write an int
         raf.write(b2);

         // set the file pointer at position 1
         raf.seek(1);

         // print the byte
         System.out.println("" + raf.readByte());
         
      } 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 −

15
20