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Java ObjectOutputStream close() Method with Example

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

ObjectOutputStream Class close() method

• close() method is available in java.io package.
• close() method is used to close this ObjectOutputStream and free all system resources linked with the stream.
• close() 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.
• close() method may throw an exception at the time of closing the stream.
  IOException: This exception may throw when getting any input/output error while reading.

Syntax:

    public void close();

Parameter(s):

• It does not accept any parameter.

Return value:

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

Example:

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

import java.io.*;

public class CloseOfOOS {
 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);
  obj_out_stm.flush();

  // By using readByte() method is to 
  // read the byte and convert it into
  // char
  char ch = (char) obj_in_stm.read();
  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

ch: A 
Stream Shutdown...