Comparing a String against values in a List<Integer>

I have two values, 5 and 6, both of which are Integers, that are part of an ArrayList. I also have another boolean method that has a String input, and I am having to compare the value of that String and go through that list and see if that value matches an element in that list. If it does match, then I should return true, else false. The goal is to see if my value matches one of the values in the list.
The list is part of a constants class, and I have my method in a Validator class. Below is my code:

Constants.java:

public static final List<Integer> TYPES = new ArrayList<Integer> (Arrays.asList(5,6));

Validator.java:

public static boolean isPromoTypeFormatValid (String value) {
	value = Util.getTrimmedValue(value);
	int intValue = Integer.valueOf(value);
	List <Integer> promoTypeList = scpduuConstants.PROMO_TYPES;
	for(int i = 0; i < promoTypeList.size(); i++) {
		if (promoTypeList.contains(intValue)) {
			return true;
		}
	}
	return false;
}

Is there a better way to do this, and would I get an issue when comparing the String value against the ArrayList value when it is an Integer? I'm a little new to this but trying to figure out the most efficient way possible. Please let me know for any suggestions.

Maybe this helps a bit:

public static final List<Integer> TYPES = new ArrayList<Integer>(Arrays.asList(5, 6));
public static void main(String[] args) {
    final String value = "5";
    checkValue(value);
}
public static boolean checkValue(String value) {
    final var valueAsInt = Integer.parseInt(value.trim());
    
    return TYPES.contains(valueAsInt);
}