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Java BufferedReader markSupported() Method with Example

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

BufferedReader Class markSupported() method

• markSupported() method is available in java.io package.
• markSupported() method is used to check whether this BufferedReader supports mark() and reset() method or not.
• markSupported() 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.
• markSupported() method does not throw an exception at the time of checking supporting methods.

Syntax:

    public boolean markSupported();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is boolean, it returns true when this stream supports mark() and reset() method otherwise it returns false.

Example:

// Java program to demonstrate the example 
// of boolean markSupported() method of 
// BufferedReader

import java.io.*;

public class MarkSupportedBR {
    public static void main(String[] args) throws Exception {
        // To open text file by using 
        // FileInputStream
        FileInputStream fis = new FileInputStream("e:/includehelp.txt");

        // Instantiates InputStreamReader 
        InputStreamReader inp_r = new InputStreamReader(fis);

        // Instantiates BufferedReader 
        BufferedReader buff_r = new BufferedReader(inp_r);

        // To check whether this stream
        // buff_r support mark() , reset()
        // or not
        boolean status = buff_r.markSupported();
        System.out.println("buff_r.markSupported(): " + status);

        // To check whether this stream
        // inp_r support mark() , reset()
        // or not
        status = inp_r.markSupported();
        System.out.println("inp_r.markSupported(): " + status);

        fis.close();
        inp_r.close();
        buff_r.close();
    }
}

Output

buff_r.markSupported(): true
inp_r.markSupported(): false