Java LongBuffer convert from ByteBuffer

import java.nio.ByteBuffer;
import java.nio.LongBuffer;

public class Main {
   public static void main(String[] args) {
      ByteBuffer bb = ByteBuffer.wrap(new byte[] { 0, 0, 0, 0, 0, 0, 0, 'a' });
      bb.rewind();//from   ww w.  j  a v  a2 s .  c o  m
      System.out.println("Byte Buffer");
      while (bb.hasRemaining())
         System.out.println(bb.position() + " -> " + bb.get());

      LongBuffer lb = ((ByteBuffer) bb.rewind()).asLongBuffer();
      System.out.println("Long Buffer");
      while (lb.hasRemaining())
         System.out.println(lb.position() + " -> " + lb.get());
   }
}