We Keep Coding

Why does my java guessing game not work after the first loop

I'm working on this guessing game where the user needs to guess the word in under 6 tries. They have the ability to try and guess the whole word but if guessed incorrectly the game ends. When the game ends it gives them the option to play again. My problem is that when I try to guess the word for the second time it gives me an error only when I enter n character.
I'm later going to replace add an array instead of the static BRAIN word and randomize it but I want to figure this out.
Here is the code:
/*
* WordGuess.java
*/
import java.util.Scanner;
/**
* Plays a word guessing game with one player.
* */
public class WordGuess {
//Main meathod
public static void main(String[] arqs) {
final String SECRET_WORD = "BRAIN";
final String FLAG = "!";
String wordSoFar = "", updatedWord = "";
String letterGuess, wordGuess = "";
int numGuesses = 0;
String repeat = "";
Scanner input = new Scanner(System.in);
/* begin game */
System. out. println ( "World Guess game. \n" );
do{
numGuesses = 0;
wordSoFar = "";
updatedWord = "";
for (int i = 0; i < SECRET_WORD.length() ; i++) {
wordSoFar += "-"; //word, as dashes
}
System.out.println("Your word is ");
System.out.println(wordSoFar + "\n"); //displays dashes
/* a11ow player to make guesses */
do{
System.out.print("Enter a letter (" + FLAG + " to guess entire world): ");
letterGuess = input.nextLine();
letterGuess = letterGuess.toUpperCase() ;
/* increment number of guesses */
//numGuesses += 1;
/* player correctly guessed a letter--excract string in wordSoFar
* up to the letter guessed and then append guessed. letter to that
* string Next, extract rest of wordSoFar and append after the guessed
* letter
*/
if (SECRET_WORD.indexOf(letterGuess) >= 0) {
updatedWord = wordSoFar.substring(0, SECRET_WORD.indexOf(letterGuess));
updatedWord += letterGuess;
updatedWord += wordSoFar.substring(SECRET_WORD.indexOf(letterGuess)+1,
wordSoFar. length() ) ;
wordSoFar = updatedWord;
}else {
numGuesses += 1;
}
/* display guessed letter instead of dash */
System.out.println(wordSoFar + "\n");
} while (!letterGuess.equals(FLAG) && !wordSoFar.equals(SECRET_WORD) && numGuesses < 6);
/* finish game anil display message anil number of guesses */
if (letterGuess.equals(FLAG)) {
System.out.println("What is your guess? ");
wordGuess = input.nextLine() ;
wordGuess = wordGuess.toUpperCase() ;
}
if (wordGuess.equals(SECRET_WORD) || wordSoFar.equals(SECRET_WORD)) {
System.out.println ( "You won! " ) ;
} else {
System.out.println("Sorry. You 1ose.");
}
System.out.println("The secret word is " + SECRET_WORD);
System.out.println("You made " + numGuesses + " mistake.");
System.out.println("Would you like to play again?");
repeat = input.next();
}while(repeat.equalsIgnoreCase("Y"));
System.out.println("GOOD BYE THANKS FOR PLAYING!");
}
}//end of Word Guess class

Solution 1 - You can move Scanner input = new Scanner(System.in); to the first do
block
do {
//Has moved to the first do block
Scanner input = new Scanner(System.in);
//Rest of your code
}
Solution 2 - You can use input.next() insted of input.nextLine() in the second do block
do {
System.out.print("Enter a letter (" + FLAG + " to guess entire world): ");
// input.nextLine() Has changed to input.next()
letterGuess = input.next();
//.. Rest of code
}

The Y input for playing again is being read in as the first character of the word. You read in the full line of input
System.out.print("Enter a letter (" + FLAG + " to guess entire world): ");
letterGuess = input.nextLine(); // <---------- HERE
letterGuess = letterGuess.toUpperCase() ;
but when you ask if they want to play again you only do input.next(), meaning that there is still some input in the buffer when this code gets called.
If you replace input.next() with input.nextLine() like so
System.out.println("You made " + numGuesses + " mistake.");
System.out.println("Would you like to play again?");
repeat = input.next(); // <---------- CHANGE this to repeat = input.nextLine();
then your program works as expected.

Letter guessing game Java

I have been working on a java guessing game for letters (a-z)! However i have created the game perfectly by using the number 1-26, but i cannot figure out how to convert each integer to a letter ie a = 1, b = 2,....z = 26!
I want the user to try and guess the letter and not the number, but i cannot workout how to do this!
(I know how to generate a random character but i cant implement and link it to each integer within the game correctly)
Random r = new Random();
char targetLetter = (char)(r.nextInt(26) + 'a');
Any help would be greatly appreciated! And i can display my code if it is needed
public class Stack {
public static void main(String[] args) {
Random rand = new Random(); //This is were the computer selects the Target
int guess;
int numGuesses = 0;
int Target;
String userName;
String playagain;
boolean play = true;
int session = 0;
int sessions = 0;
int bestScore = 0;
Scanner consoleIn = new Scanner(System.in);
Scanner name = new Scanner(System.in);
System.out.println("Hello! Please enter your name:\n"); //This is were the user enters his/her name
userName = name.nextLine();
System.out.println("Hello " + userName + " :) Welcome to the game!\n");
while (play = true) {
session++;
Target = rand.nextInt(26) + 1;
System.out.println("Guess a number between 1 and 26? You will have 5 attempts to guess the correct number"); //This is where the computer asks the user to guess the number and how many guesses they will have
do {
guess = consoleIn.nextInt();
numGuesses++;
if (guess > 26)
System.out.println("Error! Above MAXIMUM range");
else if (guess <= 0)
System.out.println("Error! Below MINIMUM range");
else if (guess > Target)
System.out.println("Sorry! Your guess was too high! :)"); //This is to help the player get to the answer
else if (guess < Target)
System.out.println("Sorry! Your guess was too low! :)"); //This is to help the player get to the answer
} while (guess != Target && numGuesses < 5);
if (guess == Target) {
System.out.println("Congratulations " + userName + ", it took you " + numGuesses + " attempts to guess correctly!"); //This tells the player that they got the correct answer and how many attempts it took
sessions++;
} else {
System.out.println("Sorry " + userName + ", You've used up all of your guesses! The correct answer was " + Target + "!"); //This tells the player that they failed to find the number and then tells them what the correct answer
}
{
Scanner answer = new Scanner(System.in);
System.out.println("Would you like another GO " + userName + "? [Y/N]");//This asks the player if they would like to play again
playagain = answer.nextLine();
if (playagain.equalsIgnoreCase("Y")) {//This is what happens if the player opts to play again
play = true;
numGuesses = 0;
} else if (playagain.equalsIgnoreCase("N")) {//This is what happens if the player opts to exit the game
play = false;
System.out.println("Thanks for playing " + userName + "! :) Please come back soon!");
System.out.println("You had " + session + " Goes");
System.out.println("The number of times you guessed correctly: " + sessions + "");
break;
}
}
}
}
}

use arrays of characters
char[] chars = ['A','B','C'...];
and use the random numbers to map to each character
char targetLetter = chars[r.nextInt(26)];

public static void main(String args[])
{
Scanner scan = new Scanner(System.in);
System.out.println("Guess the Letter");
String myLetter=scan.nextLine();
//get the letter of myLetter variable then convert to Uppercase
char enteredLetter=Character.toUpperCase(myLetter.charAt(0));
//26 only because the characters array starts with index 0
char[] characters ={'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
//I had created a parrallel array symbolizing int value of each letter
int[] range={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26};
//this variable convert user input to one of the array element of range
int userInputToInt=0;
//this variable is for knowing what int[] range array element must the value of userInputToInt fall
int userInputControlLoop=0;
char randomLetter=characters[(int)(Math.random()*26)];
// get the random input of computer convert it to int
int computerInputToInt=0;
//this loop is for getting the int value of randomLetter input by the computer
for(int i=0;i<characters.length;++i)
{
if(randomLetter==characters[i])
{
computerInputToInt=range[i];
}
}
//this loop is for getting the int value of user inputted letter
for(char i:characters)
{
if(enteredLetter==i)
{
userInputToInt=range[userInputControlLoop];
}
++userInputControlLoop;
}
//test the entered letter of user
if(enteredLetter==randomLetter)
{
System.out.println("Correct Guess");
System.out.println("The letter is:"+randomLetter);
}
//test the entered letter of user if greater than computer input
else if(userInputToInt>computerInputToInt)
{
System.out.println("Incorrect Guess");
System.out.println("The letter is too high");
System.out.println("The letter is:"+randomLetter);
}
//test the entered letter of user if lesser than computer input
else if(userInputToInt<computerInputToInt)
{
System.out.println("Incorrect Guess");
System.out.println("The letter is too low");
System.out.println("The letter is:"+randomLetter);
}
}

Use the same method that you do for your random characters. Assuming you have your guessed character as an int variable called "guess", and it has value 1-26 corresponding A-Z:
Random r = new Random();
char targetLetter = (char)(r.nextInt(26) + 'a');
...
int guess = ...
char guessChar = (char)guess + 'a';
if (guessChar == targetLetter) {
System.out.println("Correct!");
} else {
System.out.println("Guess again!")
}

You can implement it in this approach :
1- Create a String alphabet with the characters that you want.
2- declare the size of alphabet as n variable which will control the random generator range.
3- alphabet.charAt(random.nextInt(n)) is a random char from the alphabet.
program code will be :
String alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
int n = alphabet.length();
Random r = new Random();
System.out.println(alphabet.charAt(r.nextInt(n)));
hope will help solve your problem.

public class Picnic1 {
// RULE 0: This code is provided as a working example.
// This rule tests for whether a word starts with the letter 'b' (allowed to the picnic).
public static boolean rule0(char[] array) {
if (array[0] == 'b') {
return true;
}
else {
return false;
}
// itemMessage:
// Return message about whether a particular item is allowed to the picnic.
public static String item ( double[] a){
// This code works, providing output like these examples:
// "banana: true"
// "collie: false"
// It needs to be replaced with a more suitable output.
// Instead it should return, for example:
// "Yes, you can bring a banana to the picnic."
// "No, you cannot bring a collie to the picnic."
if (a[0] == 'b') {
System.out.println("Yes, you can bring a" + 'a' + "to the picnic");
}
else if (a[0] != 'b') {
System.out.print("No, you can not bring a " + 'a' + "to the picnic");
}
}
}
}

Java word shuffle game [closed]

Closed. This question needs debugging details. It is not currently accepting answers.
Edit the question to include desired behavior, a specific problem or error, and the shortest code necessary to reproduce the problem. This will help others answer the question.
Closed 6 years ago.
Improve this question
I'm having tons of issues with this program. I can't get my string comparisons to work and I have several infinite loops that I'm not sure how to fix. I would appreciate a fresh set of eyes to show me what I'm missing, I've been staring at this for 3 days and I keep skipping over my errors. The program needs to pick a random word from the given text file, scramble up that word, then have the user guess what the original word was. Hints should display what letter is at a given random position within the word.
import java.util.Scanner;
import java.util.Random;
import java.io.*;
import java.util.*;
public class Proj4 {
public static void main (String[] args) throws IOException{
int wordScore = 10;
int score = 0;
boolean game = true;
int i = 0;
Scanner in = new Scanner(System.in);
char responseLetter = 'n';
boolean allTrue = false;
boolean scramble = true;
StringBuilder sb = new StringBuilder ();
int counter = 0;
int position = 0;
System.out.println("Enter in a file containing words (Ex: words.txt) : ");
String filename = in.nextLine();
Scanner inFile = new Scanner(new File(filename));
String size = inFile.nextLine();
System.out.println(size);
int arrayLength = Integer.parseInt(size);
String[] wordList = new String[arrayLength];
Random rndm = new Random();
while (inFile.hasNext()) {
// this section puts the contents of the text file into the array
wordList[i] = inFile.nextLine();
i++;
}
while (game == true) {
// System.out.println("Current puzzle: " + scrambledWord);
// System.out.println("Current points for word " + wordScore);
// System.out.println("Enter (g)uess, (n)ew word, (h)int, or (q)uit: ");
// responseLetter = in.next().charAt(0);
if (responseLetter == 'n') {
// goes back to the beginning but does not change word. I cant move the picker down becauase it throws off g
String pickedWord = wordList[rndm.nextInt(arrayLength )];
boolean [] used = new boolean[pickedWord.length()] ; // the random word gets picked here
String [] letters = pickedWord.split("");
while (allTrue == false) {
int randomLetter = rndm.nextInt(pickedWord.length());
if (used[randomLetter] != true) {
sb.append(letters[randomLetter].charAt(0)); // does this line work?
used[randomLetter] = true;
} else if (used[randomLetter]== true) {
scramble = true;
counter++;
}
if (counter > (2 * pickedWord.length())) {
allTrue = true;
}
}
String scrambledWord = sb.toString();
if (scrambledWord.equals(pickedWord)) {
System.out.println("The words match");
allTrue = false;
}
System.out.println("Current puzzle: " + scrambledWord);
System.out.println("Current points for word " + wordScore);
System.out.println("Enter (g)uess, (n)ew word, (h)int, or (q)uit: ");
responseLetter = in.next().charAt(0);
} else if (responseLetter == 'g') {
// automatically says guess is wrong. something wrong with equals()?
System.out.println("Enter your guess: ");
in.nextLine();
String guess = in.nextLine();
if (guess.equals(pickedWord)) {
System.out.println("You guessed it!");
score += wordScore;
game = true;
} else if (!guess.equals(pickedWord)) {
System.out.println("Oops! Try again.");
wordScore--;
System.out.println("Current points for word " + wordScore);
System.out.println("Enter (g)uess, (n)ew word, (h)int, or (q)uit: ");
responseLetter = in.next().charAt(0);
}
} else if (responseLetter == 'h') {
//THIS BLOCK WORKS. DONT EVEN LOOK AT IT
Random r = new Random();
int hint = r.nextInt(pickedWord.length());
System.out.println(hint);
char letterAtSpot = pickedWord.charAt(hint);
System.out.println("The letter at spot " + hint + " is " + letterAtSpot);
wordScore--;
} else if (responseLetter == 'q') {
game = false;
} else {
System.out.println("Invalid Choice - 'g', 'n', 'h', 'q' only.");
responseLetter = 'n';
}
}
System.out.println("Goodbye!");
System.out.println("Total score: " + score);
}
}

Right out of the gate, I had a compilation error because pickedWord is being referenced outisde of the if statement in which it was declared. So, by the time it got to if (guess.equals(pickedWord)), the compiler doesn't know what pickedWord is.

The first thing that popped out at me was the if/else ladder.
String scrambledWord = sb.toString();
if (scrambledWord.equals(pickedWord)) {
System.out.println("The words match");
allTrue = false;
}
System.out.println("Current puzzle: " + scrambledWord);
System.out.println("Current points for word " + wordScore);
System.out.println("Enter (g)uess, (n)ew word, (h)int, or (q)uit: ");
responseLetter = in.next().charAt(0);
}
Notice how you close your if statement before getting a response for responseLetter. This means, your loop condition: "while game == true" isn't properly being evaluated.

Why does my program ask for a symbol 2 times instead of one(ignores first symbol)?

This is simple Hangman game:
public static void main(String[] args) {
String[] words = {"writer", "that", "program"};
int wordNumber = (int) (Math.random() * words.length);
System.out.print("Enter a letter in word ");
for (int i = 0; i < words[wordNumber].length(); i++)
System.out.print('*');
System.out.print(" > ");
Scanner input = new Scanner(System.in);
char letter;
do {
letter = input.nextLine().charAt(0);
boolean asterisksInWord = false;
String[] discoveredElements = new String[words[wordNumber].length()];
int countOfTries = 0;
int arrayCount = 0;
int asteriskCount = 0;
System.out.print("Enter a letter in word ");
do {
asterisksInWord = false;
boolean contain;
if (asteriskCount != 1) {
asteriskCount = 0;
for (char item : words[wordNumber].toCharArray()) {
contain = Arrays.asList(discoveredElements).contains(String.valueOf(item));
if (contain) {
System.out.print(item);
} else if (item == letter) {
System.out.print(item);
discoveredElements[arrayCount] = String.valueOf(item);
arrayCount++;
} else {
System.out.print('*');
asterisksInWord = true;
asteriskCount++;
}
}
}
if (asterisksInWord) {
System.out.print(" > ");
letter = input.nextLine().charAt(0);
if (asteriskCount != 1)
System.out.print("Enter a letter in word ");
} else
System.out.println("The word is " + words[wordNumber] +
" You missed " + (countOfTries + 2 - words[wordNumber].length()) + " time(s)");
countOfTries++;
} while (asterisksInWord);
System.out.print("Do you want to guess another word? Enter y or n >");
} while (input.nextLine().charAt(0) == 'y');
}
The log of it's run is
Enter a letter in word **** > t
Enter a letter in word t**t > h
Enter a letter in word th*t > a
The word is that You missed 0 time(s)
Do you want to guess another word? Enter y or n >y
y
Enter a letter in word **** >
My question is why does it ignores first symbol 'y' when asking "Do you want to guess another word?".
I'tried to create some test programs with same do-while conditions but they don't ask for character 2 times like that program.

The program asks for your input two times, because you have programmed it like that. After printing - "Do you want to guess another word? Enter y or n >" - you do input.nextLine() inside the while condition as well as as the first statement after do , so it asks for input twice.
Maybe you can move the question Enter the letter in the word to the inner do loop instead of doing that in the if condition if (asterisksInWord) { .
Also, according to your current logic, it does not ignore your first symbol, that is the real one that decides whether to exit the loop or not, the next input is actually your first guess.

Resetting a variable to new value in loop

I have a small hang man type game in which the user guesses a letter and tries to determine one of the random words from a string array. The issue is that once the user wants to play again with a new random word, the old word still shows up along side with it ?
import java.util.Random;
import java.util.Scanner;
import java.lang.Character;
public class Game
{
public static void main(String[] args)
{
String[] words = {"Computer", "Software" , "Program" ,
"Algorithms", "Unix" , "Mathematics" ,
"Quick" , "Bubble" , "Graph" };
Random rnd = new Random();
Scanner sc = new Scanner(System.in);
int index;
String word = "",
invisibleWord = "",
newString = "",
guess,
status;
while(true)
{
index = rnd.nextInt(words.length);
word = words[index];
for(int i = 0; i < word.length(); ++i)
invisibleWord += "*";
while(true){
System.out.print("(Guess) Enter a letter in word "
+ invisibleWord + " > ");
guess = sc.nextLine();
for(int j = 0; j < word.length(); ++j)
if(guess.toUpperCase().equals(Character.toString(word.charAt(j)).toUpperCase())){
if(j == 0){
newString = invisibleWord.substring(0,j) + guess.toUpperCase() + invisibleWord.substring(j + 1);
invisibleWord = newString;
} else {
newString = invisibleWord.substring(0,j) + guess + invisibleWord.substring(j + 1);
invisibleWord = newString;
}
}
if(invisibleWord.contains("*")) continue;
else break;
}
System.out.println("The word is " + word);
System.out.print("Do you want to guess another word ? " +
"Enter y or n > ");
status = sc.nextLine();
if(status.toUpperCase().equals("Y")) continue;
else if(status.toUpperCase().equals("N")) break;
}
}
}
SAMPLE RUN:
(Guess) Enter a letter in word ****** > a
(Guess) Enter a letter in word ****** > e
(Guess) Enter a letter in word *****e > i
(Guess) Enter a letter in word *****e > o
(Guess) Enter a letter in word *****e > u
(Guess) Enter a letter in word *u***e > b
(Guess) Enter a letter in word Bubb*e > l
The word is Bubble
Do you want to guess another word ? Enter y or n > y
(Guess) Enter a letter in word Bubble******** >
The problem occurs in the last line, why is Bubble still showing up as a word when it is supposed to be reset to a new random word ?

your question itself answers it! you need to reset the variable. try following
if(status.toUpperCase().equals("Y"))
{
invisibleWord = "";
continue;
}

You are not resetting invisibleWord after each iteration.
while(true)
{
invisibleWord="";
index = rnd.nextInt(words.length);
word = words[index];
for(int i = 0; i < word.length(); ++i)
invisibleWord += "*";
while(true){
System.out.print("(Guess) Enter a letter in word "
+ invisibleWord + " > ");
guess = sc.nextLine();
for(int j = 0; j < word.length(); ++j)
if(guess.toUpperCase().equals(Character.toString(word.charAt(j)).toUpperCase())){
if(j == 0){
newString = invisibleWord.substring(0,j) + guess.toUpperCase() + invisibleWord.substring(j + 1);
invisibleWord = newString;
} else {
newString = invisibleWord.substring(0,j) + guess + invisibleWord.substring(j + 1);
invisibleWord = newString;
}
}
if(invisibleWord.contains("*")) continue;
else break;
}
System.out.println("The word is " + word);
System.out.print("Do you want to guess another word ? " +
"Enter y or n > ");
status = sc.nextLine();
if(status.toUpperCase().equals("Y")) continue;
else if(status.toUpperCase().equals("N")) break;
}
}
}