Why does the "getBytes()" method of org.apache.hadoop.io.Text not return actually bytes?

[ChingShen]

Hi,

  I use the org.apache.hadoop.io.Text object to set its value "測試" in
chinese text(six bytes in UTF-8 encoding), and when I invoke its
"getBytes()" method that return the raw bytes (11 bytes), but it's actually
only six bytes. I knew that object involves the "getLength()" method.
My question is that the "getBytes()" method why not return actually bytes?

Why should not be:
 public byte[] getBytes() {
   //return bytes
    return Arrays.copyOf(bytes,getLength());
  }

thanks in advance

Shen