Convert ArrayList<Byte> into a byte[] [duplicate]

Question

Possible Duplicate:
How to convert an ArrayList containing Integers to primitive int array?

How to convert an ArrayList<Byte> into a byte[]?

ArrayList.toArray() gives me back a Byte[].

Answer 1

byte[] result = new byte[list.size()];
for(int i = 0; i < list.size(); i++) {
    result[i] = list.get(i).byteValue();
}

Yeah, Java's collections are annoying when it comes to primitive types.

Answer 2

After calling toArray() you can pass the result into the Apache Commons toPrimitive method:

https://commons.apache.org/proper/commons-lang/javadocs/api-release/org/apache/commons/lang3/ArrayUtils.html#toPrimitive-java.lang.Byte:A->