arrays in java

can someone tell me how to copy a 2 dimensional array to a 1 dimensional one? Ie.
array:
{2, 3, 5}
{4, 7, 9}
should become {2, 3, 5, 4, 7, 9}

Python, alternative:

ConvertArray = lambda x: reduce(operator.add, x)

>>8
So what?

>>> [2, 3, 5] + [4, 7, 9]
[2, 3, 5, 4, 7, 9]


Far nicer, easier to read and write, easier to understand for somebody who doesn't know the language, and WTF, less verbose? I thought everybody bashed Python for being verbose.