Java Reader.mark(int readAheadLimit)

public void mark(int readAheadLimit)  throws IOException

//from  w  w  w.  j  av a  2s .c o  m

import java.io.*;

public class Main {

   public static void main(String[] args) {
      try {
         String s = "tutorial from java2s.com";

         Reader reader = new StringReader(s);

         for (int i = 0; i < 5; i++) {
            char c = (char) reader.read();
            System.out.println(c);
         }

         reader.mark(10);

         for (int i = 0; i < 6; i++) {
            char c = (char) reader.read();
            System.out.println(c);
         }

         reader.reset();

         for (int i = 0; i < 6; i++) {
            char c = (char) reader.read();
            System.out.println(c);
         }
         reader.close();

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