Java 8 ListV 到 MapK, V

java
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
class Student {
    private String name;
    private int age;
    public Student(String name, int age) {
        this.name = name;
        this.age = age;
    }
    public String getName() {
        return name;
    }
    public int getAge() {
        return age;
    }
}
public class ListToMapExample {
    public static void main(String[] args) {
        List studentList = new ArrayList<>();
        studentList.add(new Student("Alice", 18));
        studentList.add(new Student("Bob", 20));
        studentList.add(new Student("Charlie", 19));
        Map studentMap = studentList.stream()
            .collect(Collectors.toMap(Student::getName, Student::getAge));
        System.out.println(studentMap);
    }
}