如何在比较冻结的集合时使用Lambda函数找到精确的字符串匹配？

import java.util.Arrays;
import java.util.List;

public class StringMatch {
    public static void main(String[] args) {
        List<String> frozenSet = Arrays.asList("apple", "banana", "orange", "grape");

        String targetString = "banana";

        String matchedString = frozenSet.stream()
                .filter(str -> str.equals(targetString))
                .findFirst()
                .orElse(null);

        if (matchedString != null) {
            System.out.println("Found a match: " + matchedString);
        } else {
            System.out.println("No match found.");
        }
    }
}