There is probably a simple one-liner that I am just not finding here, but this is my question:
How do I check if an ArrayList contains all of the objects in another ArrayList? I am looking (if it exists) for something along the lines of:
//INCORRECT EXAMPLE:
if(one.contains(two))
{
return true;
}
else
{
return false;
}
For example:
ArrayList one = {1, 2, 3, 4, 5}
ArrayList two = {1, 2, 3} --> True
ArrayList two = {} --> True
ArrayList two = {1, 2, 3, 4, 5} --> True
ArrayList two = {1, 5, 2} --> True
ArrayList two = {1, 7, 4} --> False
ArrayList two = {0, 1, 3} --> False
ArrayList two = {4, 5, 6} --> False
ArrayList two = {7, 8, 9} --> False
There is a method called containsAll
declared in the java.util.Collection
interface. In your setting one.containsAll(two)
gives the desired answer.