How to find duplicate string from an Array of String [duplicate]

Answer 1

If you need unique things then we have Set in java

  String[] users = "User1,User2,User1,User,User".split(",");

        Set uniquUsers = new HashSet();

        for (int i = 0; i < users.length; i++) {
            if (!uniquUsers.add(users[i]))
                users[i] = "Duplicate"; // here I am assigning Duplicate instead if find duplicate
                                        // you can assign as null or whatever you want to do with duplicates.
        }
        System.out.println(Arrays.toString(users));