java - 如何检查字符串中的字母/字符是否都在字符数组中找到

Question

如何检查字符串是否仅包含某个字符数组中的字母

import java.util.*;

public class Main {

    static char[] f = {'q','w','e','r','t','y','u','i','o','p'};
    static char[] s = {'a','s','d','f','g','h','j','k','l'};
    static char[] t = {'z','x','c','v','b','n','m'};

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int count = 0;
        for(int i = 0; i < n; i++) {
            String str = sc.nextLine();
            if(string only contains letters from array f) count++;
        }
    }
}

Answer 1

这是我的代码，也许可以帮助你:

public static boolean checkIfStringContainsLettersFromArray(String str, char [] arr) {
    String arrString = new String(arr);

    for(int i = 0; i < str.length(); i++) {
        if(arrString.indexOf(str.charAt(i)) < 0) return false; 
    }
    return true;
}