as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
system
create a function in java that takes array of integers and checks if it contains duplicates.
user
public static boolean containsduplicates(int[] arr) {
    
    set<integer> set = new hashset<integers>();
    for(int i : arr) {
        if(set.contains(arr[i])) {
            return true;
        } else {
            set.add(i);
        }
    }
    return false;
}
assistant