Object-Oriented Programming with Java, part I – Exercise 58

This program accepts user input and adds it to a list until the user inputs the same word twice at which point it stops.

My Code

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

public class RecurringWord {

    public static void main(String[] args) {
        Scanner reader = new Scanner(System.in);
        // create here the ArrayList 
        ArrayList<String> words = new ArrayList<String>();
        
        boolean test = true;
        String input = "";
        
        while (test){
            System.out.print("Type a word: ");
            input = reader.nextLine();
            if (words.contains(input)) {
                test = false;
            }
            words.add(input);
            
        }
        
        System.out.println("You gave the word " + input + " twice");
    }
}

Model Code

import java.util.ArrayList;

import java.util.Scanner;

 

public class RecurringWord {

 

    public static void main(String[] args) {

        Scanner reader = new Scanner(System.in);

        // create here the ArrayList 

        

        ArrayList<String> words = new ArrayList<String>();

        while (true) {

            System.out.print("Type a word:");

            String word = reader.nextLine();

            if (words.contains(word)) {

                System.out.println("You gave twice the word " + word);

                break;

            }

            words.add(word);

        }  

    }

}

Comments

I’ll count that as somewhat of an epic failure. My boolean variable could have been replaced by a simple break in the if statement and the String variable didn’t need to be there at all. 🙂