import java.util.*;public class Test {    public static void main(String[] args) {        List<Student> list = List.of(                new Student("Bob", 78),                new Student("Alice", 85),                new Student("Brush", 66),                new Student("Newton", 99));        var holder = new Students(list);        System.out.println(holder.getScore("Bob") == 78 ? "测试成功!" : "测试失败!");        System.out.println(holder.getScore("Alice") == 85 ? "测试成功!" : "测试失败!");        System.out.println(holder.getScore("Tom") == -1 ? "测试成功!" : "测试失败!");        System.out.println(holder.getScore("Alice") == 85 ? "测试成功!" : "测试失败!");    }}class Students {    List<Student> list;    Map<String, Integer> cache;    Students(List<Student> list) {        this.list = list;        cache = new HashMap<>();    }    /**     * 根据name查找score，找到返回score，未找到返回-1     */    int getScore(String name) {        // 先在Map中查找:        Integer score = this.cache.get(name);        if (score == null) {            cache.put(name,this.findInList(name));        }        return score == null ? -1 : score.intValue();    }    Integer findInList(String name) {        for (var ss : this.list) {            if (ss.name.equals(name)) {                return ss.score;            }        }        return null;    }}class Student {    String name;    int score;    Student(String name, int score) {        this.name = name;        this.score = score;    }}