Reader markSupported() method in Java with Examples

The markSupported() method of Reader Class in Java is used to check whether this Reader is supports mark() operation or not. It returns a boolean which states if the reader is mark supported.

Syntax:

public boolean markSupported()

Parameters: This method does not accepts any parameters



Return Value: This method returns a boolean value which tells if this Reader supports mark() operation or not. It return true if it is markSupported. Else it returns false.

Below methods illustrates the working of markSupported() method:

Program 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// Reader markSupported() method
  
import java.io.*;
import java.util.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            String str = "GeeksForGeeks";
  
            // Create a Reader instance
            Reader reader
                = new StringReader(str);
  
            // Check if the Reader is
            // markSupported using markSupported()
            System.out.println("Is Reader markSupported: "
                               + reader.markSupported());
  
            reader.close();
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

chevron_right






                        filter_none









Output:


Is Reader markSupported: true





Program 2:











                                    filter_none




                                    edit

                                    close




                                    play_arrow




                                    link

                                    brightness_4

                                    code
                                




















// Java program to demonstrate 


// Reader markSupported() method 


  


import java.io.*; 


import java.util.*; 


  


class GFG { 


    public static void main(String[] args) 


    { 


  


        try { 


            char[] str = { 'G', 'E', 'E', 'K', 'S' }; 


  


            // Create a Reader instance 


            Reader reader 


                = new CharArrayReader(str); 


  


            // Check if the Reader is 


            // markSupported using markSupported() 


            System.out.println("Is Reader markSupported: "


                               + reader.markSupported()); 


  


            reader.close(); 


        } 


        catch (Exception e) { 


            System.out.println(e); 


        } 


    } 


} 



















                        chevron_right







                        filter_none









Output:


Is Reader markSupported: true





Reference: https://docs.oracle.com/javase/9/docs/api/java/io/Reader.html#markSupported–



          
          
          
          

            

    

        My Personal Notes
        arrow_drop_up
    

    

        
        

            
            
        

    


Recommended Posts:
Code_r
Check out this Author's contributed articles.
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please Improve this article if you find anything incorrect by clicking on  the "Improve Article" button below.