Java.io.RandomAccessFile.writeChar() Method

Description

The java.io.RandomAccessFile.writeChar(int v) method writes a char to the file as a two-byte value, high byte first. The write starts at the current position of the file pointer.

Declaration

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

public final void writeChar(int v)

Parameters

• v -- a char value 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.writeChar() method.

package com.tutorialspoint;

import java.io.*;

public class RandomAccessFileDemo {

   public static void main(String[] args) {
      try {
         int i = 70;
         // create a new RandomAccessFile with filename test
         RandomAccessFile raf = new RandomAccessFile("c:/test.txt", "rw");

         // write a char in the file
         raf.writeChar(i);

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

         // read char
         System.out.println("" + raf.readChar());

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

         // write a char at the start
         raf.writeChar(71);

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

         // read char
         System.out.println("" + raf.readChar());
      } 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:

F
G