Java.io.ByteArrayInputStream markSupported() 方法

package com.codingdict;

import java.io.ByteArrayInputStream;

import java.io.IOException;



public class ByteArratInputStreamDemo {

   public static void main(String[] args) throws IOException {

      byte[] buf = {65, 66, 67, 68, 69};

      ByteArrayInputStream bais = null;

      try {



         // create new byte array input stream

         bais = new ByteArrayInputStream(buf);

         // test support for mark() and reset() methods invocation

         boolean isMarkSupported = bais.markSupported();

         System.out.println("Is mark supported : "+isMarkSupported);

         System.out.println("Following is the proof:");



         // print bytes

         System.out.println("Byte read "+ bais.read());

         System.out.println("Byte read "+ bais.read());

         System.out.println("Byte read "+ bais.read());

         System.out.println("Mark() invocation");

         // mark() invocation;

         bais.mark(0);

         System.out.println("Byte read "+ bais.read());

         System.out.println("Byte read "+ bais.read());


         System.out.println("Reset() invocation");


         // reset() invocation

         bais.reset();

         System.out.println("Byte read "+ bais.read());

         System.out.println("Byte read "+ bais.read());



      } catch(Exception e) {



         // if I/O error occurs

         e.printStackTrace();

      } finally {

         if(bais!=null)

            bais.close();

      }   

   }

}