如何将列表转换为Map<K、V>而不是List<V>

import java.util.*;

public class ListToMapExample {
    public static void main(String[] args) {
        List<Student> studentList = new ArrayList<>();
        studentList.add(new Student(1, "Alice"));
        studentList.add(new Student(2, "Bob"));
        studentList.add(new Student(3, "Charlie"));

        Map<Integer, Student> studentMap = new HashMap<>();
        for (Student student : studentList) {
            studentMap.put(student.getId(), student);
        }

        // 使用键查找学生对象
        Student student = studentMap.get(2);
        System.out.println(student.getName());  // 输出: Bob
    }
}

class Student {
    private int id;
    private String name;

    public Student(int id, String name) {
        this.id = id;
        this.name = name;
    }

    public int getId() {
        return id;
    }

    public String getName() {
        return name;
    }
}