How do I do a deep copy of a 2d array in Java?

Question

I just got bit by using .clone() on my 2d boolean array, thinking that this was a deep copy.

How can I perform a deep copy of my bool

Answer 1

In Java 8 this can be accomplished as a one-liner using lambdas:

 T[][] deepCopy(T[][] matrix) {
    return java.util.Arrays.stream(matrix).map(el -> el.clone()).toArray($ -> matrix.clone());
}