Java.io.StringReader.markSupported() Method

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Description

The java.io.StringReader.markSupported() method tells whether this stream supports the mark() operation, which it does.

Declaration

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

public boolean markSupported()

Parameters

NA

Return Value

This method returns true if and only if this stream supports the mark operation.

Exception

NA

Example

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

package com.tutorialspoint;

import java.io.*;

public class StringReaderDemo {
   public static void main(String[] args) {
      String s = "Hello World";

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

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

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

         // print if mark is supported
         System.out.println("" + sr.markSupported());

         // close the stream
         sr.close();

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

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

Hello
true