Java.io.PushbackReader.markSupported() Method

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