This is a simple method to check for duplicates in an ArrayList:
checkDuplicate : Methodpublic static boolean checkDuplicate(ArrayList list) { HashSet set = new HashSet(); for (int i = 0; i < list.size(); i++) { boolean val = set.add(list.get(i)); if (val == false) { return val; } } return true;}
Charlie has over a decade of experience in website administration and technology management. As the site admin, he oversees all technical aspects of running a high-traffic online platform, ensuring optimal performance, security, and user experience.
