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Java ObjectOutputStream reset() Method with Example

ObjectOutputStream Class reset() method: Here, we are going to learn about the reset() method of ObjectOutputStream Class with its syntax and example.
Submitted by Preeti Jain, on April 08, 2020

ObjectOutputStream Class reset() method

• reset() method is available in java.io package.
• reset() method is used to reset this stream. It reset the stream to the position marked most recently.
• reset() 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.
• reset() method may throw an exception at the time of resetting the stream.
  IOException: This exception may throw when getting any input/output error while writing to the output stream.

Syntax:

    public void reset();

Parameter(s):

• It does not accept any parameter.

Return value:

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

Example:

// Java program to demonstrate the example 
// of void reset() method of ObjectOutputStream

import java.io.*;

public class ResetOfOOS {
 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 byte to the stream		
  obj_out_stm.writeByte(65);

  // By using reset() method is to
  // reset the stream 
  obj_out_stm.reset();

  // Write another bytes to the
  // stream
  obj_out_stm.writeByte(66);
  obj_out_stm.writeByte(67);

  // By using flush() method is to
  // flush the stream immediately
  System.out.println("Stream Flushed...");
  obj_out_stm.flush();

  // By using readByte() method is to 
  // read the byte and convert it into
  // char
  for (int i = 0; i < 3; ++i) {
   char ch = (char) obj_in_stm.readByte();
   System.out.println("ch: " + ch + " ");
  }

  // 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

Stream Flushed...
ch: A 
ch: B 
ch: C 
Stream Shutdown...