Home » Java programming language

Java FileOutputStream finalize() Method with Example

FileOutputStream Class finalize() method: Here, we are going to learn about the finalize() method of FileOutputStream Class with its syntax and example.
Submitted by Preeti Jain, on April 01, 2020

FileOutputStream Class finalize() method

• finalize() method is available in java.io package.
• finalize() method is used to free connection to the file and it assures that close() method of this FileOutputStream invokes when there is none references exist to this FileOutputStream.
• finalize() 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.
• finalize() method may throw an exception at the time of finalizing the stream.
  IOException: This exception may throw while getting any input/output error.

Syntax:

    protected void finalize();

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 finalize() method of FileOutputStream

import java.io.*;

public class FinalizeOfFOS extends FileOutputStream {
 public FinalizeOfFOS() throws Exception {
  super("D:\\includehelp.txt");
 }
 public static void main(String[] args) throws IOException {
  int val;

  try {
   // Instantiates FinalizeOfFOS
   FinalizeOfFOS fos_stm = new FinalizeOfFOS();

   // By using write() method is to write
   // a byte to fos_stm
   fos_stm.write(97);

   // By using finalize() method is to free
   // memory when no more references exists   

   System.out.println("finalize() invoked: ");
   fos_stm.finalize();

   // when we call write() method after
   // finalizing the stream will not result an exception
   fos_stm.write(99);
  } catch (Exception ex) {
   System.out.println(ex.toString());
  }
 }
}

Output

finalize() invoked: