Assignment A6

Unique Punctuation Marks §

import java.util.HashSet;  
import java.util.Scanner;  
import java.util.Set;  
  
public class Main {  
    public static void main(String[] args) {  
        // caleb b  
        // unique punctuation marks        
        Scanner scan = new Scanner(System.in);  
        System.out.println("Enter a sentence: ");  
        String sentence = scan.nextLine();  
        Set<String> uniquePunctuations = new HashSet<>();  
        for (int i = 0; i < sentence.length(); i++) {  
            if (sentence.charAt(i) == '.' || sentence.charAt(i) == ',' || sentence.charAt(i) == '?' || sentence.charAt(i) == '!' || sentence.charAt(i) == ';' || sentence.charAt(i) == ':' || sentence.charAt(i) == '-') {  
                uniquePunctuations.add(sentence.substring(i, i + 1));  
            }  
        }  
        System.out.println("There are " + uniquePunctuations.size() + " unique punctuation marks in the sentence.");  
        System.out.println("The unique punctuation marks are: " + uniquePunctuations);  
    }  
}

Word Game §

import java.text.DecimalFormat;  
import java.util.HashSet;  
import java.util.Scanner;  
import java.util.Set;  
  
public class Main {  
    public static void main(String[] args) {  
        // caleb b  
        // word game        
        Scanner scan = new Scanner(System.in);  
        System.out.println("Enter a letter: ");  
        String letter = scan.nextLine();  
        letter = letter.toUpperCase();  
        // remove any extra characters or spaces  
        letter = letter.replaceAll("[^A-Z]", "");  
        Set<String> words = new HashSet<String>();  
        // check if the input is a single letter  
        if (letter.length() != 1) {  
            System.out.println("Please enter a single letter.");  
            System.exit(0);  
        }  
        System.out.println("Name as many unique 5 letter words as you can that begin with " + letter + ".");  
        boolean runGame = true;  
        while (runGame) {  
            System.out.println("Enter a 5 letter word that begins with " + letter + ", or type quit to quit: ");  
            String word = scan.nextLine();  
            word = word.toUpperCase();  
            // ensure the word is 5 letters  
            if (word.length() != 5 && !word.equalsIgnoreCase("quit")) {  
                System.out.println("Please enter a 5 letter word.");  
                continue;            } else if (word.equalsIgnoreCase("quit")) {  
                runGame = false;  
                break;            }  
            // ensure the word begins with the letter  
            if (!word.startsWith(letter)) {  
                System.out.println("Please enter a word that begins with " + letter + ".");  
                continue;            }  
            words.add(word);  
        }  
        System.out.print("You got " + words.size() + " words: ");  
        for (String word : words) {  
            System.out.print(word + " ");  
        }  
    }  
}