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Java PushbackReader close() Method with Example

PushbackReader Class close() method: Here, we are going to learn about the close() method of PushbackReader Class with its syntax and example.
Submitted by Preeti Jain, on April 20, 2020

PushbackReader Class close() method

  • close() method is available in java.io package.
  • close() method is used to close this 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 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
// PushbackReader

import java.io.*;

public class CloseOfPBR {
    public static void main(String[] args) throws Exception {
        Reader r_stm = null;
        PushbackReader pb_r = null;

        try {
            // Instantiates Reader and PushbackReader
            r_stm = new StringReader("Java World!!!!");
            pb_r = new PushbackReader(r_stm);

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

            // when we call read() method
            // after closing the stream will
            // result an exception
            pb_r.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 (r_stm != null) {
                r_stm.close();
                if (pb_r != null) {
                    pb_r.close();
                }
            }
        }
    }
}

Output

Stream Closed Before!!!





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