Thread: Mastermind game

I am confused on how to write a Boolean that will end the game if the guess is correct if anyone can help I would greatly appreciate it
My teacher calls it baseball lol so I made a baseball class which contains all of my methods and arraylist of words to guess from

<import java.util.*;
import java.io.*;
 
public class Baseball {
 
    private ArrayList<String> numbers;
    private String secret;
    private int count, strike, ball;
    private StringBuffer hideNumber = new StringBuffer();
    private StringBuffer disguise = new StringBuffer();
 
    public Baseball(){
 
        numbers = new ArrayList<String>();
        numbers.add("012");
        numbers.add("123");
        numbers.add("456");
        numbers.add("789");
        numbers.add("098");
        numbers.add("765");
        numbers.add("432");
        numbers.add("109");
        numbers.add("876");
        numbers.add("543");
        numbers.add("210");
        numbers.add("987");
        numbers.add("654");
        numbers.add("321");
        numbers.add("135");
        numbers.add("579");
        numbers.add("024");
        numbers.add("468");
        numbers.add("420");
        numbers.add("864");
        numbers.add("531");
        numbers.add("975");
        numbers.add("079");
        numbers.add("035");
        numbers.add("046");
 
        secret = numbers.get((int)Math.floor(Math.random()*numbers.size()));
    }
 
    public StringBuffer choseWord(String s){
        hideNumber.append(s);
        return hideNumber;
    }
 
    public void noBalls(String guess){
       count = 0;
       for(int i = 0; i < hideNumber.length(); i++){
           for(int j = 0; j < hideNumber.length(); j++){
               if(i != j && guess.charAt(i) == hideNumber.charAt(j)){
                   count++;
                   ball = count;
               }
           }
       }
    }
 
    public void noStrikes(String guess){
        count = 0;
        for(int i = 0; i < hideNumber.length(); i++){
            if(guess.charAt(i) == hideNumber.charAt(i)){
                count++;
                strike = count;
            }
        }
    }
 
    public Boolean gameOver(){
 
            return true;
    }
 
    @Override
    public String toString(){
        return "Strikes: " + strike + " " + "Balls: " + ball;
    }
 
    public ArrayList<String> getNumbers() {
        return numbers;
    }
 
    public String getSecret() {
        return secret;
    }
 
    public StringBuffer getHideNumber() {
        return hideNumber;
    }
 
    public StringBuffer getDisguise() {
        return disguise;
    }
 
     public Integer getBall() {
        return ball;
    }
 
    public Integer getStrike() {
        return strike;
    }
}>

This is my main class that will execute the game

<import java.util.*;
import java.io.*;
 
public class Homework2 {
 
    public static void main(String[] args){
 
        Scanner input = new Scanner(System.in);
        boolean repeat = false;
        boolean valid = false;
        String guess, secret, answer;
        StringBuffer guesses, number;
        int tries = 0;
 
        while(!repeat){
            Baseball play = new Baseball();
            secret = play.getSecret();
            number = play.choseWord(secret);
            System.out.println("*****************************");
            System.out.println("*****WELCOME TO BASEBALL*****");
            System.out.println("**  (c) Devin Johnson      **");
            System.out.println("**      Have Fun!!!!       **");
            System.out.println("*****************************" +"\n");
            System.out.println("Key for debugging: " + number);
 
            while(play.gameOver()){
                System.out.print("Guess three numbers: ");
                guess = input.nextLine();
                tries++;
                Character a = guess.charAt(0);
                Character b = guess.charAt(1);
                Character c = guess.charAt(2);
                if(guess.length() < 0 || guess.length() > 3 || Character.isAlphabetic(a)
                        || Character.isAlphabetic(b) || Character.isAlphabetic(c))
                {
                    System.out.println("Invalid input, Please try again!");
                    continue;
                }
                if(a == b || a == c || b == c || c == a || b == a ){
                    System.out.println("Invalid input, Please try again!");
                    continue;
                }
                else{
 
                       play.noBalls(guess);
                       play.noStrikes(guess);
                       System.out.println(play); 
 
                }
                if(!play.gameOver()){
                    System.out.println("Congrats!    You are correct!    It took you "+ tries + " tries.");
 
                } 
            }
            System.out.print("Would you like to play again, yes/no:");
            answer = input.next();
            repeat = answer.equalsIgnoreCase("no");
        }
    }
 
}>

--- Update ---

The code is all mine also just confused how I should do a Boolean or if I even should do one?

That is true thank you very much i didnt think about that

What are all those numbers for?

numbers = new ArrayList<String>();
        numbers.add("012");

the numbers were for creating my own arraylist that contained a bank of number strings for the computer to randomly generate one as the secret number to have the user guess from