Java.io.BufferedReader.reset() Method

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Description

The java.io.BufferedReader.reset() method resets the stream to the most recent mark.

Declaration

Following is the declaration for java.io.BufferedReader.reset() method.

public void reset()

Parameters

NA

Return Value

This method does not return any value.

Exception

IOException − If the stream is never been marked, or the mark has become invalid.

Example

The following example shows the usage of java.io.BufferedReader.reset() method.

package com.tutorialspoint;

import java.io.BufferedReader;
import java.io.StringReader;

public class BufferedReaderDemo {
   public static void main(String[] args) throws Exception {
      String s ="ABCDE";
      StringReader sr = null; 
      BufferedReader br = null;

      try {
         sr = new StringReader(s);
         
         // create new buffered reader
         br = new BufferedReader(sr);

         // reads and prints BufferedReader
         System.out.println((char)br.read());
         System.out.println((char)br.read());
         
         // mark invoked at this position
         br.mark(0);
         System.out.println("mark() invoked");
         System.out.println((char)br.read());
         System.out.println((char)br.read());
         
         // reset() repositioned the stream to the mark
         br.reset();
         System.out.println("reset() invoked");
         System.out.println((char)br.read());
         System.out.println((char)br.read());
         
      } catch (Exception e) {
         // exception occurred.
         e.printStackTrace();
      } finally {
         // releases any system resources associated with the stream
         if(sr!=null)
            sr.close();
         if(br!=null)
            br.close();
      }
   }
}

Let us compile and run the above program, this will produce the following result −

A
B
mark() invoked
C
D
reset() invoked
C
D