PushbackReader reset() method in Java with Examples

The reset() method of PushbackReader Class in Java is used to reset the Stream. In the case of PushbackReader, this method always throws an exception as this method isn’t supported by the PushbackReader.

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 always as 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
// PushbackReader reset() method
  
import java.io.*;
import java.util.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
            // Initializing a StringReader
            // and PushbackReader
            String s = "GeeksForGeeks";
  
            StringReader stringReader
                = new StringReader(s);
            PushbackReader pushbackReader
                = new PushbackReader(stringReader);
  
            // reset the stream position
            pushbackReader.reset();
  
            // Close the stream using reset()
            pushbackReader.close();
            System.out.println("Stream Closed.");
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

chevron_right


Output:

java.io.IOException: mark/reset not supported

Program 2:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java program to demonstrate
// PushbackReader reset() method
  
import java.io.*;
import java.util.*;
  
class GFG {
    public static void main(String[] args)
    {
  
        try {
            // Initializing a StringReader
            // and PushbackReader
            String s = "GFG";
  
            StringReader stringReader
                = new StringReader(s);
            PushbackReader pushbackReader
                = new PushbackReader(stringReader);
  
            // reset the stream position
            pushbackReader.reset();
  
            // Close the stream
            pushbackReader.close();
            System.out.println("Stream Closed.");
        }
        catch (Exception e) {
            System.out.println(e);
        }
    }
}

chevron_right


Output:

java.io.IOException: mark/reset not supported

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



My Personal Notes arrow_drop_up

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.