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Java RandomAccessFile writeBoolean() Method with Example

RandomAccessFile Class writeBoolean() method: Here, we are going to learn about the writeBoolean() method of RandomAccessFile Class with its syntax and example.
Submitted by Preeti Jain, on March 23, 2020

RandomAccessFile Class writeBoolean() method

• writeBoolean() method is available in java.io package.
• writeBoolean() method is used to write the given Boolean value (val) to the file as 1 byte and in terms of boolean value byte, 1 indicates true whereas byte 0 indicates false.
• writeBoolean() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• writeBoolean() method may throw an exception at the time of writing boolean value.
  IOException: This exception may throw an exception while performing input/output operation.

Syntax:

    public final void writeBoolean(boolean val);

Parameter(s):

• boolean val – represents the boolean value to write.

Return value:

The return type of this method is void, it returns nothing.

Example:

// Java program to demonstrate the example 
// of void writeBoolean(boolean val) method of
// RandomAccessFile

import java.io.*;

class RAFWriteBoolean {
 public static void main(String[] args) throws Exception {

  // Instantiate a random access file
  // object with file name and permissions
  RandomAccessFile ra_f = new RandomAccessFile("e:/includehelp.txt", "rw");

  // By using writeBoolean() method is to 
  // write boolean to the file as 1 byte
  ra_f.writeBoolean(true);

  // by using seek() method is to 
  // set the current file indicator
  // from where read/write could 
  // start i.e. we set here 0 so reading
  // will be done from 0 till EOF
  ra_f.seek(0);

  // By using readBoolean() method is to 
  // read boolean as a 8 bit value
  boolean status = ra_f.readBoolean();
  System.out.println("ra_f.readBoolean(): " + status);

  // By using close() method isto
  // close this stream ran_f
  ra_f.close();
 }
}

Output

ra_f.readBoolean(): true