how to check if all elements of java collection match some condition?

Question

I have an ArrayList. I want to check if all elements of the list are greater then or less then certain condition. I can do it by iterating on eac

Answer 1

You can use Google guavas Iterables.all

 Iterables.all(collection, new Predicate() {
    boolean apply(T element)  {
       .... //check your condition 
   } 
 } 

Answer 2

If you have java 8, use stream's allMatch function (reference):

 ArrayList<Integer> col = ...;
 col.stream().allMatch(i -> i>0); //for example all integers bigger than zero

Answer 3

You cannot check values without iterating on all elements of the list.

for(Integer value : myArrayList){

    if(value > MY_MIN_VALUE){
        // do my job
    }
}

I hope this will help