Best way to append null bytes to a byte array?

Question

I have a fixed length byte array and need to add two null bytes to its end. I have an implementation that I wrote to do this, though I was wondering whether someone could improve on what I have:
public byte[] appendNullBytes( byte[] bytes ) {
   byte[] copyBytes = new byte[bytes.length+2];
   System.arraycopy(bytes, 0, copyBytes, 0, bytes.length);
   copyBytes[copyBytes.length-1] = 0;
   copyBytes[copyBytes.length-2] = 0;
   return copyBytes
}

Answer 1

ajmasx wrote:
jverd wrote:
ajmasx wrote:
jverd wrote:
Those aren't null bytes, they're zero bytes. A bytes can never have the value null in Java.I was using the term null interchangeably with 'zero', Which is not generally applicable in Java.Well it all depends what you are doing:
- A null is a zero value.Not in general in Java. Null is null and zero is zero.
- char c = '\0' defines a null character.Yes, that's the only use of "null" for primitive types.
- A null pointer is where the address is zero and not pointing to some location in memory.Nope. A null pointer is simply one that doesn't point to any value. Nothing in the spec says it's zero.
- A null reference is more or less the same thing (there are certain difference in the details).Nope. A null pointer and null reference in Java are the same thing.
- A null terminated string is one where null defines the end of the string.This does not exist in Java. As the above smartass pointed out, you can put the null character at the end of a String, but that character is part of the String, not a terminator.
>
If you are dealing with files and other types of I/O then this concept most certainly exists. Not in Java.
Just because you are limiting yourself to high-level use of Java, does not mean they aren't present in Java.The fact that null is precisely defined in the JLS and does not include these things means they aren't present in Java.