Java.io.PushbackReader.markSupported() Method

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Description

The java.io.PushbackReader.markSupported() method tells whether this stream supports the mark() operation, which it does not.

Declaration

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

public boolean markSupported()

Parameters

NA

Return Value

This method does not return a value.

Exception

NA

Example

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

package com.tutorialspoint;

import java.io.*;

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

      try {
         // 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();

         // check if mark is supported by this class
         System.out.println("" + pr.markSupported());

         // 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
false