What default hashCode is used for a list in Java?

In Java, the standard hashCode() method for a list (for example, for ArrayList) is implemented to consider the order and contents of the list elements. It is calculated using a formula similar to that for collections in AbstractList:

int hashCode = 1;
for (E e : list)
    hashCode = 31 * hashCode + (e == null ? 0 : e.hashCode());

Thus, the hash code depends on the hash codes of all list elements and their order. This ensures that two lists with the same elements in the same order will have the same hashCode().