对字符串进行排序并删除字符

import java.util.Arrays;

public class StringSortAndRemove {
    public static String sortAndRemoveChars(String str, char[] charsToRemove) {
        char[] charArray = str.toCharArray();

        // 排序字符数组
        Arrays.sort(charArray);

        // 删除指定字符
        StringBuilder sb = new StringBuilder();
        for (char c : charArray) {
            if (!contains(charsToRemove, c)) {
                sb.append(c);
            }
        }

        return sb.toString();
    }

    private static boolean contains(char[] chars, char c) {
        for (char ch : chars) {
            if (ch == c) {
                return true;
            }
        }
        return false;
    }

    public static void main(String[] args) {
        String str = "dcba";
        char[] charsToRemove = {'b', 'd'};

        String result = sortAndRemoveChars(str, charsToRemove);
        System.out.println(result);  // 输出：ac
    }
}