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Java ObjectInputStream close() Method with Example

ObjectInputStream Class close() method: Here, we are going to learn about the close() method of ObjectInputStream Class with its syntax and example.
Submitted by Preeti Jain, on April 04, 2020

ObjectInputStream Class close() method

• close() method is available in java.io package.
• close() method is used to close this ObjectInputStream and free any system resources linked with this 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 performing.

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 ObjectInputStream

import java.io.*;

public class CloseOfOIS {
 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 writeUTF() method is to write
  // string to the obj_out_stm stream
  obj_out_stm.writeUTF("JAVA PROGRAMMING!!");
  obj_out_stm.flush();

  obj_in_stm.skipBytes(2);

  for (int i = 0; i < obj_in_stm.available(); 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("close() executed: ");

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

Output

ch: J 
ch: A 
ch: V 
ch: A 
ch:   
ch: P 
ch: R 
ch: O 
ch: G 
close() executed: