Finding if an array contains all elements in another array

Question

I am trying to loop through 2 arrays, the outer array is longer then the other. It will loop through the first and if the 2nd array does not contain that int it will return

Answer 1

You have two options using java.util.Arrays if you don't want to implement it yourself:

• Arrays.toList(array).contains(x) which does exactly you are doing right now. It is the best thing to do if your array is not guaranteed to be sorted.
• Arrays.binarySearch(x,array) provided if your array is sorted. It returns the index of the value you are search for, or a negative value. It will be much, much faster than regular looping.