Java.io.PushbackReader.reset() Method

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Description

The java.io.PushbackReader.reset() method resets the stream. The reset method of PushbackReader always throws an exception.

Declaration

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

public void reset()

Parameters

NA

Return Value

This method does not return a value.

Exception

IOException − Always, since reset is not supported.

Example

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

package com.tutorialspoint;

import java.io.*;

public class PushbackReaderDemo {
   public static void main(String[] args) {

   
      try {
         String s = "Hello World";

         // create a new StringReader
         StringReader sr = new StringReader(s);

         // create a new PushBack reader based on our string reader
         PushbackReader pr = new PushbackReader(sr, 20);

         // read the first five chars
         for (int i = 0; i < 5; i++) {
            char c = (char) pr.read();
            System.out.print("" + c);
         }

         // change line
         System.out.println();

         // try to reset and get an exception because it is not supported
         pr.reset();

         // close the stream
         pr.close();

      } catch (IOException ex) {
         ex.printStackTrace();
      }
   }
}

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

Hello
java.io.IOException: mark/reset not supported