Java.io.BufferedReader.markSupported() Method

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Description

The java.io.BufferedReader.markSupported() method returns true if the stream supports mark() method.

Declaration

Following is the declaration for java.io.Bufferedreader.marksupported() method.

public boolean markSupported()

Parameters

NA

Return Value

The method returns boolean value. Returns true if mark() is supported.

Exception

NA

Example

The following example shows the usage of java.io.Bufferedreader.marksupported() method.

package com.tutorialspoint;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;

public class BufferedReaderDemo {
   public static void main(String[] args) throws Exception {
      InputStream is = null; 
      InputStreamReader isr = null;
      BufferedReader br = null;

      try {
         // open input stream test.txt for reading purpose.
         is = new FileInputStream("c:/test.txt");
         
         // create new input stream reader
         isr = new InputStreamReader(is);
         
         // create new buffered reader
         br = new BufferedReader(isr);
      
         boolean bool = false;
         
         // returns true if the stream type supports mark
         bool = br.markSupported();
         
         System.out.println("Buffered reader supports mark : "+bool);
         
      } catch(Exception e) {
         e.printStackTrace();
      } finally {
         // releases resources associated with the streams
         if(is!=null)
            is.close();
         if(isr!=null)
            isr.close();
         if(br!=null)
            br.close();
      }
   }
}

Assuming we have a text file c:/test.txt, which has the following content. This file will be used as an input for our example program −

ABCDE

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

Buffered reader supports mark : true