Java Serializable convert to ByteBuffer

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.nio.ByteBuffer;

public class Main {
  public static void main(String[] argv) throws Exception {
    ByteBuffer buf = toBuffer("demo2s.com");

    System.out.println(buf);/*from w  w w  . j  a  v  a 2 s  .  c o m*/

  }
  /**
   * Convert a serializable object to buffer.
   *
   * @param obj
   * @return
   * @throws IOException
   */
  public static ByteBuffer toBuffer(Serializable obj) throws IOException {
      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      ObjectOutputStream oos = new ObjectOutputStream(baos);
      oos.writeObject(obj);
      oos.flush();
      ByteBuffer buffer = ByteBuffer.wrap(baos.toByteArray());
      oos.close();
      baos.close();
      return buffer;
  }
}