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Java FilterReader close() Method with Example

FilterReader Class close() method: Here, we are going to learn about the close() method of FilterReader Class with its syntax and example.
Submitted by Preeti Jain, on April 03, 2020

FilterReader Class close() method

• close() method is available in java.io package.
• close() method is used to close this FilterReader stream and free all 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.

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 FilterReader

import java.io.*;

public class CloseOfFR {
 public static void main(String[] args) throws Exception {
  Reader r_stm = null;
  FilterReader fr_stm = null;

  try {
   // Instantiates StringReader and 
   // FilterReader
   r_stm = new StringReader("Java World!!!!");
   fr_stm = new FilterReader(r_stm) {};

   // By using close() method is to
   // close this fr_stm stream
   fr_stm.close();

   // when we call read() method
   // after closing the stream will
   // result an exception
   fr_stm.read();
  } catch (Exception ex) {
   System.out.println("Stream Closed Before!!!");
  } finally {
   // with the help of this block is to
   // free all necessary resources linked
   // with the stream
   if (fr_stm != null) {
    fr_stm.close();
   }
  }
 }
}

Output

Stream Closed Before!!!