猜数字游戏

package day4;import java.util.Random;import java.util.Scanner;//猜字符public class GuessingGame {    public static void main(String[] args) {        Scanner scan = new Scanner(System.in);        int count = 0;  //记录猜错的次数        char[] chs = generate(); //生成5个字符        for(int i=0;i<chs.length;i++){            System.out.print(chs[i]);        }        System.out.println();        while(true){  //自造死循环            System.out.println("猜吧!");            String str = scan.next().toUpperCase();//接收用户的串            if("EXIT".equals(str)){//判断字符串相等的方法                System.out.println("下次再来");                break;            }            char[] input = str.toCharArray();//将串转为数组            int[] result = check(chs,input);//对比            if(result[1]==chs.length){                int score = chs.length*100-count*10;                System.out.println("恭喜你，猜对了，得分"+score);                break;  //结束循环            }else{                count++; //猜错一次加1                System.out.println("字符对了"+result[0]+"个，位置对了"+result[1]+"个");            }        }    }    //随机生成5个字符数组    public static char[] generate(){        char[] chs = new char[5];        Random rand = new Random();        char[] letters = {'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'};        boolean[] flags = new boolean[letters.length];        for(int i=0;i<chs.length;i++){            int index;            do{                index = rand.nextInt(letters.length);            }while(flags[index]);            chs[i] = letters[index];            flags[index] = true;        }        return chs;    }  //比较  public static int[] check(char[] chs,char[] input){    int[] result = new int[2];     for(int i=0;i<chs.length;i++){        for(int j=0;j<input.length;j++){            if(chs[i]==input[j]){                result[0]++; //字符对增1                if(i==j){                    result[1]++; //位置对增1                }                break;            }        }    }    return result;  }}