Java.io.PushbackInputStream markSupported() Method

Description

The java.io.PushbackInputStream.markSupported() method tests if this input stream supports the mark and reset methods, which it does not.

Declaration

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

public boolean markSupported()

Parameters

NA

Return Value

This method returns false, since this class does not support the mark and reset methods.

Exception

NA

Example

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

package com.tutorialspoint;

import java.io.*;

public class PushbackInputStreamDemo {
   public static void main(String[] args) {
      
      // declare a buffer and initialize its size:
      byte[] arrByte = new byte[1024];

      // create an array for our message
      byte[] byteArray = new byte[]{'H', 'e', 'l', 'l', 'o'};


      // create object of PushbackInputStream class for specified stream
      InputStream is = new ByteArrayInputStream(byteArray);
      PushbackInputStream pis = new PushbackInputStream(is);

      // check if mark is supported
      System.out.println("" + pis.markSupported());
      
      try {
         // read from the buffer one character at a time
         for (int i = 0; i < byteArray.length; i++) {

            // read a char into our array
            arrByte[i] = (byte) pis.read();

            // display the read byte
            System.out.print((char) arrByte[i]);
         }
      } catch (Exception ex) {
         ex.printStackTrace();
      }
   }
}

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

false
Hello