Java怎样实现猜字小游戏

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思路

语法基础：StringBuilder 类似列表，可以更改元素。

package Practice;public class tt {    public static void main(String[] args) {        String str = "banana";        System.out.println(str.indexOf('z')); // -1        System.out.println(str.indexOf('a', 2)); // 3        StringBuilder words = new StringBuilder();        for (int i = 0; i < 5; i++)            words.append('*'); // "*****"        System.out.println(words.length()); // 5        System.out.println(words.indexOf("a"));// -1        System.out.println(words.indexOf("*", 1)); // 1        words.setCharAt(3, 'a'); // "***a*"        System.out.println(words);    }}

代码

package Practice;import java.util.Scanner;public class Guess {    public static String words[] = {"banana", "telecommunication", "programming", "bupt"};    public static boolean[] guessed = new boolean[words.length]; // 判断猜过    public static int num_guessed = 0; // 猜过的单词数量    public static char keep; // 是否继续y or n    public static void main(String[] args) {//        for(int i = 0; i < guessed.length; i ++ ) System.out.println(guessed[i]);        Scanner scanner = new Scanner(System.in);        do{            // 随机产生要猜测的单词  ans            int index = (int) (Math.random() * words.length);            String ans = words[index];            // 再来一次时的重复检测            while(guessed[index] == true)            {                index = (int) (Math.random() * words.length);                ans = words[index];            }            // 初始化，StringBuilder类似list            StringBuilder guessedWord = new StringBuilder();            for (int i = 0; i < ans.length(); i++)                guessedWord.append('*');            int numberOfCorrectLettersGuessed = 0, numberOfMisses = 0;            // 模拟过程            while (numberOfCorrectLettersGuessed < ans.length()) {                System.out.print("(Guess) Enter a letter in word " + guessedWord                        + " > ");                String s = scanner.nextLine();                char letter = s.charAt(0);                if (guessedWord.indexOf(letter + "") >= 0) { // 猜中，但重复，不算错误次数                    System.out.println("       " + letter + " is already in the word");                } else if (ans.indexOf(letter) < 0) { // 猜错                    System.out.println("       " + letter + " is not in the word");                    numberOfMisses++;                } else { // 猜中，进行标记与赋值                    int k = ans.indexOf(letter);                    while (k >= 0) {                        guessedWord.setCharAt(k, letter);                        numberOfCorrectLettersGuessed++;                        k = ans.indexOf(letter, k + 1);                    }                }            }            System.out.println("The word is " + ans + ". You missed "                    + numberOfMisses + ((numberOfMisses <= 1) ? " time" : " times"));            guessed[index] = true;            num_guessed += 1;            if(num_guessed < words.length)            {                System.out.print("Do you want to guess for another word? Enter y or n> ");                keep = scanner.nextLine().charAt(0);            }        }while(keep == 'y' && num_guessed < words.length);        if(keep == 'y')            System.out.println("Perfect!!!");        else            System.out.println("You have guessed " + num_guessed + ((num_guessed <= 1) ? " word~" : " words~"));    }}

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