CharArrayReader reset() method in Java with Examples

The reset() method of CharArrayReader Class in Java is used to reset the stream. After reset, if the stream has been marked, then this method attempts to reposition it at the mark, else it will try to position it to the starting.

Syntax:

public void reset()

Parameters: This method do not accepts any parameter.



Return Value: This method do not returns any value.

Exception: This method throws IOException:

  • if some error occurs while input output
  • if the stream has not been marked
  • if the mark has been invalidated
  • if the reset() method is not supported.

Below methods illustrates the working of reset() method:

Program 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// CharArrayReader reset() method
  
import java.io.*;
import java.util.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
  
            char[] str = { 'G', 'e', 'e', 'k', 's',
                           'F', 'o', 'r',
                           'G', 'e', 'e', 'k', 's' };
  
            // Create a CharArrayReader instance
            CharArrayReader reader
                = new CharArrayReader(str);
  
            // Get the character
            // to be read from the stream
            int ch;
  
            // Read the first 10 characters
            // to this reader using read() method
            // This will put the str in the stream
            // till it is read by the reader
            for (int i = 0; i < 10; i++) {
                ch = reader.read();
                System.out.print((char)ch);
            }
  
            System.out.println();
  
            // mark the stream for
            // 5 characters using reset()
            reader.mark(5);
  
            // reset the stream position
            reader.reset();
  
            // Read the 5 characters from marked position
            // to this reader using read() method
            for (int i = 0; i < 5; i++) {
                ch = reader.read();
                System.out.print((char)ch);
            }
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

chevron_right






                        filter_none









Output:


GeeksForGe
eks??





Program 2:











                                    filter_none




                                    edit

                                    close




                                    play_arrow




                                    link

                                    brightness_4

                                    code
                                




















// Java program to demonstrate 


// CharArrayReader reset() method 


  


import java.io.*; 


import java.util.*; 


  


class GFG { 


    public static void main(String[] args) 


    { 


  


        try { 


            char[] str = { 'G', 'e', 'e', 'k', 's', 


                           'F', 'o', 'r', 


                           'G', 'e', 'e', 'k', 's' }; 


  


            // Create a CharArrayReader instance 


            CharArrayReader reader 


                = new CharArrayReader(str); 


  


            // Get the character 


            // to be read from the stream 


            int ch; 


  


            // Read the first 10 characters 


            // to this reader using read() method 


            // This will put the str in the stream 


            // till it is read by the reader 


            for (int i = 0; i < 10; i++) { 


                ch = reader.read(); 


                System.out.print((char)ch); 


            } 


  


            System.out.println(); 


  


            // reset the stream position 


            reader.reset(); 


  


            // Read the 5 characters from marked position 


            // to this reader using read() method 


            for (int i = 0; i < 5; i++) { 


                ch = reader.read(); 


                System.out.print((char)ch); 


            } 


        } 


        catch (Exception e) { 


            System.out.println(e); 


        } 


    } 


} 



















                        chevron_right







                        filter_none









Output:


GeeksForGe
Geeks





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



          
          
          
          

            

    

        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.