我目前正在用java编写一个刽子手控制台游戏，到目前为止没有任何问题。
我现在遇到了一个似乎无法解决的问题。
我有不同单词的数组，简单，中等和硬，并根据所选择的难度随机得到一个单词。然后我将该单词转换为*，以便玩家无法看到这些字符。
然后向用户询问信件，并且程序通知用户他们是对还是错。但问题是，如果在单词中，我似乎无法将*改为字母。因此，例如，如果单词是“bee”并且玩家选择了b，我希望 *更改为b 。
有人能帮我指出正确的方向吗？
Hangman课程：
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package hangman;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Random;
import java.util.Scanner;
/**
*
* @author Adam2_000
*/
public class Hangman {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
String player = "";
String selection;
int turn = 12;
List<String> wordBox = new ArrayList<String>();
boolean hangman = false;
Scanner scan = new Scanner(System.in);
//New instances of class and arrays
words words = new words();
String easyWords1[] = words.easyWords;
String mediumWords1[] = words.mediumWords;
String hardWords1[] = words.hardWords;
Random random = new Random();
System.out.println("Welcome to Hangman version 1");
System.out.println("Please choose a difficulty");
System.out.println("A: Easy");
System.out.println("B: Medium");
System.out.println("C: Hard");
System.out.println(" _________ ");
System.out.println("| | ");
System.out.println("| 0 ");
System.out.println("| /|\\ ");
System.out.println("| / \\ ");
System.out.println("| ");
System.out.println("| ");
char iChoice;
do {
selection = scan.nextLine().toUpperCase();
} while (selection.isEmpty());
iChoice = selection.charAt(0);
if (iChoice != 'X') {
switch (iChoice) {
case 'A':
System.out.println("You have choosen easy:");
//Get and print random string from easyWords
int selectA = random.nextInt(easyWords1.length);
String replaceAllEasy = easyWords1[selectA].replaceAll("\\S", "*");
// Print the randomly selected word and its length
System.out.println("Random String selected: " + replaceAllEasy);
System.out.println("This word contains " + easyWords1[selectA].length() + " letters");
//while hangman == false continue to ask player for letters
while (hangman == false) {
System.out.println("Turns remaining: " + turn);
System.out.println("Please choose a letter A-Z :");
String easyChosenLetter = scan.next();
if (wordBox.contains(easyChosenLetter)) {
System.out.println("Letter alreay choosen please choose another letter");
} else {
wordBox.add(easyChosenLetter);
}
if (easyWords1[selectA].contains(easyChosenLetter)) {
System.out.println("Wordbox letters are: " + wordBox);
System.out.println("Yes!");
turn--;
} else {
System.out.println("Wordbox letters are: " + wordBox);
System.out.println("No!");
turn--;
}
if (turn == 0) {
hangman = true;
}
while (hangman == true) {
System.out.println("You lose!");
System.exit(0);
}
}
break;
case 'B':
System.out.println("You have choosen Medium");
//Get and print random string from mediumWords
int selectB = random.nextInt(mediumWords1.length);
String replaceAllMedium = mediumWords1[selectB].replaceAll("\\S", "*");
// Print the randomly selected word and its length
System.out.println("Random String selected: " + replaceAllMedium);
System.out.println("This word contains " + mediumWords1[selectB].length() + " letters");
//while hangman == false continue to ask player for letters
while (hangman == false) {
System.out.println("Turns remaining: " + turn);
System.out.println("Please choose a letter A-Z :");
String mediumChosenLetter = scan.next();
if (wordBox.contains(mediumChosenLetter)) {
System.out.println("Letter alreay choosen please choose another letter");
} else {
wordBox.add(mediumChosenLetter);
}
wordBox.add(mediumChosenLetter);
if (easyWords1[selectB].contains(mediumChosenLetter)) {
System.out.println("Wordbox letters are: " + wordBox);
System.out.print("Yes!");
turn--;
} else {
System.out.println("Wordbox letters are: " + wordBox);
System.out.println("No!");
turn--;
}
if (turn == 0) {
hangman = true;
}
while (hangman == true) {
System.out.println("You lose!");
System.exit(0);
}
}
break;
case 'C':
System.out.println("You have choosen Hard");
//Get and print random string from hardWords
int selectC = random.nextInt(hardWords1.length);
String replaceAllHard = hardWords1[selectC].replaceAll("\\S", "*");
// Print the randomly selected word and its length
System.out.println("Random String selected: " + replaceAllHard);
System.out.println("This word contains " + hardWords1[selectC].length() + " letters");
//while hangman == false continue to ask player for letters
while (hangman == false) {
System.out.println("Turns remaining: " + turn);
System.out.println("Please choose a letter A-Z :");
String hardChosenLetter = scan.next();
if (wordBox.contains(hardChosenLetter)) {
System.out.println("Letter alreay choosen please choose another letter");
} else {
wordBox.add(hardChosenLetter);
}
wordBox.add(hardChosenLetter);
if (easyWords1[selectC].contains(hardChosenLetter)) {
System.out.println("Wordbox letters are: " + wordBox);
System.out.print("Yes!");
turn--;
} else {
System.out.println("Wordbox letters are: " + wordBox);
System.out.println("No!");
turn--;
}
if (turn == 0) {
hangman = true;
}
while (hangman == true) {
System.out.println("You lose!");
System.exit(0);
}
}
break;
}
}
}
}
单词类：
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package hangman;
import java.lang.reflect.Array;
import java.util.Random;
/**
*
* @author Adam2_000
*/
public class words extends Hangman {
String[] easyWords = {"Bee", "Car", "Fish", "Shed"};
String[] mediumWords = {"House", "Sheep", "Castle", "Phone"};
String[] hardWords = {"Octagon", "Crocodile", "Chocolate", "Motorbike"};
public String[] getEasyWords() {
return easyWords;
}
public void setEasyWords(String[] easyWords) {
this.easyWords = easyWords;
}
public String[] getMediumWords() {
return mediumWords;
}
public void setMediumWords(String[] mediumWords) {
this.mediumWords = mediumWords;
}
public String[] getHardWords() {
return hardWords;
}
public void setHardWords(String[] hardWords) {
this.hardWords = hardWords;
}
@Override
public String toString() {
return "words{" + "easyWords=" + easyWords + ", mediumWords=" + mediumWords + ", hardWords=" + hardWords + '}';
}
}
答案 0 :(得分：1)
您将不得不将字符串“***”替换为“B **”，而不是更改字符串的第一个字符。 字符串在Java中是不可变的。
String oldstr = "***";
String newstr = 'B'+oldstr.substring(1,2);
可能Strings不是此任务的正确数据结构。也许你想使用类似字符数组的东西并编写自己的print函数。
即使是包含这些字符数组的Word类也是一个好主意，因为每个对象都可以有自己的索引，告诉你有多少*'s可以猜测等等。
Word类的半伪。这实际上使用String s。未经测试。
public class Word{
private String name;
private String guessedSoFar;
public String getGuessedSoFar(){
return guessedSoFar;
}
public void changeIndexWith(String achar, int index){
String temp = name.substring(0,index) + achar + name.substring(index+1, name.length();
guessedSoFar = temp;
}
public void setName(String n){
name = n;
}
public String getName(){
return name;
}
}