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Java ObjectOutputStream writeBoolean() Method with Example

ObjectOutputStream Class writeBoolean() method: Here, we are going to learn about the writeBoolean() method of ObjectOutputStream Class with its syntax and example.
Submitted by Preeti Jain, on April 09, 2020

ObjectOutputStream Class writeBoolean() method

  • writeBoolean() method is available in java.io package.
  • writeBoolean() method is used to write the given boolean value.
  • 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.
    IOException: This exception may throw when getting any input/output error while writing to the output stream.


    public void writeBoolean(boolean value);


  • boolean value – represents the boolean to write.

Return value:

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


// Java program to demonstrate the example 
// of void writeBoolean(boolean value) method of //ObjectOutputStream

import java.io.*;

public class WriteBooleanOfOOS {
 public static void main(String[] args) throws Exception {
  // Instantiates ObjectOutputStream , ObjectInputStream 
  // FileInputStream and FileOutputStream
  FileOutputStream file_out_stm = new FileOutputStream("D:\\includehelp.txt");
  ObjectOutputStream obj_out_stm = new ObjectOutputStream(file_out_stm);
  FileInputStream file_in_stm = new FileInputStream("D:\\includehelp.txt");
  ObjectInputStream obj_in_stm = new ObjectInputStream(file_in_stm);

  // By using writeBoolean() method is to
  // write the boolean to the stream		


  // By using readBoolean() method is to 
  // read the boolean
  boolean b1 = (boolean) obj_in_stm.readBoolean();
  boolean b2 = (boolean) obj_in_stm.readBoolean();

  System.out.println("obj_in_stm.readBoolean(): " + b1);
  System.out.println("obj_in_stm.readBoolean(): " + b2);

  // By using close() method is to 
  // close all the streams 
  System.out.println("Stream Shutdown... ");



obj_in_stm.readBoolean(): true
obj_in_stm.readBoolean(): false
Stream Shutdown... 

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