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Java ObjectOutputStream writeByte() Method with Example

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

ObjectOutputStream Class writeByte() method

• writeByte() method is available in java.io package.
• writeByte() method is used to write a byte (i.e. 8 bit).
• writeByte() 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.
• writeByte() method may throw an exception at the time of writing byte.
  IOException: This exception may throw when getting any input/output error while writing to the output stream.

Syntax:

    public void writeByte(int value);

Parameter(s):

• int value – represents an integer that denotes a byte to be written.

Return value:

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

Example:

// Java program to demonstrate the example 
// of void writeByte(int value) method of
// ObjectOutputStream

import java.io.*;

public class WriteByteOfOOS {
 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 writeByte() method is to
  // write the byte to the stream		
  obj_out_stm.writeByte(65);
  obj_out_stm.writeByte(97);

  obj_out_stm.flush();


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

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

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

  file_in_stm.close();
  file_out_stm.close();
  obj_in_stm.close();
  obj_out_stm.close();

 }
}

Output

obj_in_stm.readByte(): 65
obj_in_stm.readByte(): 97
Stream Shutdown...