In Julia, slicing operations like x[1:10] create a copy by default. However, copying data is not always the fastest option; in some cases, using a "view" into the parent array is more efficient. To address this, Julia provides functions and macros like view, @view, and @views for creating a "view" of a parent array, which is returned as a SubArray type. SubArray in Julia refers to the type of an array that shares memory with another array — that is, it's a container encoding a "view" of a parent AbstractArray. Here's an example:
julia> original_array = [10, 20, 30, 40, 50];
julia> sub_array = @view a[1:3];
julia> original_array
5-element Vector{Int64}:
10
20
30
40
50
julia> sub_array
3-element view(::Vector{Int64}, 1:3) with eltype Int64:
10
20
30
julia> sub_array[2] = 100;
julia> original_array
5-element Vector{Int64}:
10
100
30
40
50
julia> sub_array
3-element view(::Vector{Int64}, 1:3) with eltype Int64:
10
100
30
How does one achieve this in Java. I know of Arrays.copyRange, but it makes a new array. Making it less efficient, as well as not modifying the original array when the subarray is modified