Remove duplicates [first one]

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String[] str = scanner.nextLine().split(",");

        for (int i = 0; i < str.length-1; i++) {
            if (str[i].equals(str[i+1])&& i+1!=str.length-1){
                continue;
            } if (!str[i].equals(str[i+1]) && i+1!=str.length-1){
                System.out.print(str[i]+",");
            } else if (!str[i].equals(str[i+1]) && i+1==str.length-1){
                System.out.print(str[i]+","+str[i+1]);
            } else {
                System.out.print(str[i+1]);
            }
        }
    }
}