Question

Exercise 4 – Lists and input

Using a function Write a program that prompts the user to input a sequence of words. The program then displays a list of unique words (words that only occurred once, i.e. no repeated).

Answer 1

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class ListsInput {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter sequence of words:");
        String s = scanner.nextLine();
        String[] splits = s.split(" ");
        List<String> list = new ArrayList<>();
        boolean f;

        for(String x: splits){
            f = false;
            for(int i = 0;i<list.size();i++){
                if(x.equals(list.get(i))){
                    f = true;
                    break;
                }
            }
            if(!f){
                list.add(x);
            }
        }

        System.out.println(list);
    }
}