java - An array is subset of another array

Question

How can I efficiently check to see whether all the elements in an integer array are subset of all elements of another Array in java? For example [33 11 23] is subset of [11 23 33 42]. Thanks in advance.

Answer 1

If you're not bound to using Arrays, any Java collection has the containsAll method:

boolean isSubset = bigList.containsAll(smallList);

This will do exactly what you want, efficiently.