java - móviles - manual de programacion android pdf

No se puede detener mientras está en bucle

Question

En este juego que creé, encontré un problema. Todo funciona muy bien, excepto que si fallas por alguna razón, el juego simplemente se reinicia y eso no es lo que quiero. Quiero mostrar lo que tengo configurado para mostrar y luego romper el ciclo, por alguna razón el break; no está funcionando. Código:

import java.util.Scanner;
import java.util.Random;
public class GuessingGame1_3 {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
Random rand = new Random();
System.out.print("Pick a number to guess between: ");
int userNumber = input.nextInt();
int random = rand.nextInt(userNumber);
if (random < 1) {
random = random + 1;
} else if (random > userNumber) {
random = random - 1;
}
while (true) {
System.out.print(''/f'');
System.out.print("Pick the amount of attempts you would like to have (Max of 10 attempts): ");
int userAttempts = input.nextInt();
if (userAttempts > 10) {
System.out.println("To Many Attempts");
System.out.println("");
} else if (userAttempts <= 10) {
System.out.println("Version: 1.3");
System.out.println("----------------------------------------------------------------------");
System.out.println("You have " + userAttempts + " attempts to guess the number or else you fail. Goodluck!");
System.out.println("");
System.out.println("Type ''begin'' to Begin!");
String start = input.next();
System.out.print(''/f'');
if (start.equals("begin")) {
for(int i=1; i<userAttempts + 1; i++) {
System.out.print("Enter a number between 1-" + userNumber + ": ");
int number = input.nextInt();
if (number > random) {
System.out.println("Too Big");
System.out.println("");
} else if (number < random) {
System.out.println("Too Small");
System.out.println("");
} else if (number == random) {
System.out.println("Correct!");
break;
}
if (i == userAttempts) {
System.out.println("You have failed");
System.out.println("Number Was: " + random);
break;
}
}
} else if (!start.equals("begin")) {
System.out.print(''/f'');
System.out.println("Incorrect Command");
System.out.println("Please Exit Console And Retry");
break;
}
}
}
}
}

Answer 1

Con bucles anidados si desea break el bucle externo, puede agregar un prefijo de etiqueta ¹ .

game: while (true) {

entonces podrías

break game;

para terminar la declaración que está etiquetada game .

^{1 _{Ver también JLS-14.7. Las declaraciones etiquetadas que dicen (en parte) declaraciones pueden tener prefijos de etiqueta .}}

Answer 2

Introduzca una variable para verificar si debe continuar el ciclo. Algo como:

 public static void main(String[] args) {
Scanner input = new Scanner(System.in);
Random rand = new Random();
System.out.print("Pick a number to guess between: ");
int userNumber = input.nextInt();
int random = rand.nextInt(userNumber);
if (random < 1) {
random = random + 1;
} else if (random > userNumber) {
random = random - 1;
}
boolean continueGame = true;
while (continueGame) {
System.out.print(''/f'');
System.out
.print("Pick the amount of attempts you would like to have (Max of 10 attempts): ");
int userAttempts = input.nextInt();
if (userAttempts > 10) {
System.out.println("To Many Attempts");
System.out.println("");
} else if (userAttempts <= 10) {
System.out.println("Version: 1.3");
System.out
.println("----------------------------------------------------------------------");
System.out
.println("You have "
+ userAttempts
+ " attempts to guess the number or else you fail. Goodluck!");
System.out.println("");
System.out.println("Type ''begin'' to Begin!");
String start = input.next();
System.out.print(''/f'');
if (start.equals("begin")) {
for (int i = 1; i < userAttempts + 1; i++) {
System.out.print("Enter a number between 1-"
+ userNumber + ": ");
int number = input.nextInt();
if (number > random) {
System.out.println("Too Big");
System.out.println("");
} else if (number < random) {
System.out.println("Too Small");
System.out.println("");
} else if (number == random) {
System.out.println("Correct!");
continueGame = false;
}
if (i == userAttempts) {
System.out.println("You have failed");
System.out.println("Number Was: " + random);
continueGame = false;
}
}
} else { //You may remove if (!start.equals("begin")) check
//as the result is either true or false and you
//have checked the true condition in if
System.out.print(''/f'');
System.out.println("Incorrect Command");
System.out.println("Please Exit Console And Retry");
continueGame = false;
}
}
}
}

Answer 3

Necesita romper el bucle externo y los bucles internos

Eche un vistazo: (variable failattempt )

import java.util.Scanner;
import java.util.Random;
public class GuessingGame1_3 {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
Random rand = new Random();
System.out.print("Pick a number to guess between: ");
int userNumber = input.nextInt();
int random = rand.nextInt(userNumber);
if (random < 1) {
random = random + 1;
} else if (random > userNumber) {
random = random - 1;
}
boolean failattempt = false;
while (true) {
System.out.print(''/f'');
System.out.print("Pick the amount of attempts you would like to have (Max of 10 attempts): ");
int userAttempts = input.nextInt();
if (userAttempts > 10) {
System.out.println("To Many Attempts");
System.out.println("");
} else if (userAttempts <= 10) {
System.out.println("Version: 1.3");
System.out.println("----------------------------------------------------------------------");
System.out.println("You have " + userAttempts + " attempts to guess the number or else you fail. Goodluck!");
System.out.println("");
System.out.println("Type ''begin'' to Begin!");
String start = input.next();
System.out.print(''/f'');
if (start.equals("begin")) {
for(int i=1; i<userAttempts + 1; i++) {
System.out.print("Enter a number between 1-" + userNumber + ": ");
int number = input.nextInt();
if (number > random) {
System.out.println("Too Big");
System.out.println("");
} else if (number < random) {
System.out.println("Too Small");
System.out.println("");
} else if (number == random) {
System.out.println("Correct!");
break;
}
if (i == userAttempts) {
System.out.println("You have failed");
System.out.println("Number Was: " + random);
failattempt = true;
break;
}
}
if (failattempt == true)
break;
} else if (!start.equals("begin")) {
System.out.print(''/f'');
System.out.println("Incorrect Command");
System.out.println("Please Exit Console And Retry");
break;
}
}
}
}
}