checking for a subset in android application

Question

So I have an array of strings (let's call it array1) and then I have another array (array2 say) and I want to check if array2 is a subset of array1.. is there a simple command for that?

edit:

scenario2

I have array1 (which is user generated through an edittext with strings say names of people) and I have a matrix that I want to check to see if each individual row is a subset of array1.. for example.. array1 = "bob" , "john" , "joe" , "frank" and I have a 2x3 matrix with names in each of 6 items of it and I want to check if each row is a subset of array1.. so if row1 of the matrix was equal to "jim" , "joe" , "frank" and row2 was equal to "joe" , "bob" , "frank" then only row2 would be a subset of array1

Answer 1

It depends on how big the array is, but if it's not very big you can just loop for each element in array2, whether it exists in array2.

Note that this is true if the arrays are sets (i.e. no duplicate value and the ordering does not matter). I assume they are since you are talking about subsets

Answer 2

You can but both arrays into separate HashSets and then call containsAll on array1's set with array2's set.