Java.io.RandomAccessFile.write() Method

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Description

The java.io.RandomAccessFile.writeBoolean(boolean v) method writes a boolean to the file as a one-byte value. The value true is written out as the value (byte)1; the value false is written out as the value (byte)0. The write starts at the current position of the file pointer.

Declaration

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

public final void writeBoolean(boolean v)

Parameters

  • v -- a boolean 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.write() method.

package com.tutorialspoint;

import java.io.*;

public class RandomAccessFileDemo {

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

         // write a boolean
         raf.writeBoolean(false);

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

         // print the boolean
         System.out.println("" + raf.readBoolean());

         // write a boolean
         raf.writeBoolean(b);

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

         // print the boolean
         System.out.println("" + raf.readBoolean());
      } 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:

false
true



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