Java.io.RandomAccessFile.writeBytes() Method

Description

The java.io.RandomAccessFile.writeBytes(String s) method writes the string to the file as a sequence of bytes. Each character in the string is written out, in sequence, by discarding its high eight bits. The write starts at the current position of the file pointer.

Declaration

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

public final void writeBytes(String s)

Parameters

• s -- a string of bytes 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.writeBytes() 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 bytes in the file
         raf.writeBytes("Hello World");

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

         // read line
         System.out.println("" + raf.readLine());

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

         // write bytes at the start
         raf.writeBytes("This is an example");

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

         // read line
         System.out.println("" + raf.readLine());
      } 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:

Hello World
This is an example