Java.io.RandomAccessFile.readBoolean() Method


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Description

The java.io.RandomAccessFile.readBoolean() method reads a boolean from this file. This method reads a single byte from the file, starting at the current file pointer. A value of 0 represents false. Any other value represents true.

Declaration

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

public final boolean readBoolean()

Parameters

NA

Return Value

This method returns the boolean value read.

Exception

  • IOException − If an I/O error occurs.Not thrown if end-of-file has been reached.

  • EOFException − If this file has reached the end.

Example

The following example shows the usage of java.io.RandomAccessFile.readBoolean() 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 something in the file
         raf.writeUTF("Hello World");

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

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

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

         // write 0 at the start
         raf.write(0);

         // read 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

java_io_randomaccessfile.htm

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