文档介绍：package studentManager; public class Course { private String id; private String name; public Course(String id, String name) { this .id = id; this .name = name; } public Course() {} public String getId() { return id; } public void setId(String id) { this .id = id; } public String getName() { return name; } public void setName(String name) { this .name = name; } public static void main(String[] args) { }} package studentManager; public class Course course { private Course course; public CourseScore() {} public CourseScore(Course course, float score) { this .course = course; this .score = score; } private float score; public Course getCourse() { return course; } public void setCourse(Course course) { this .course = course; } public float getScore() { return score; } public void setScore( float score) { this .score = score; }} package studentManager; import ; public class Student { private String id; private String name; private int age; private List<CourseScore> courseScore; public Student() {} public Student(String id, String name, int age, List<CourseScore> courseScore) { super (); this .id = id; this .name = name; this .age = age; this .courseScore = courseScore; } public String getId() { return id; } public void setId(String id) { this .id = id; } public String getName() { return name; } public void setName(String name) { this .name = name; } public int getAge() { return age; } public void setAge( int age) { this .age = age; } public List<CourseScore> getCourseScore() { return courseScore; } public void setCourseScore(List<CourseScore> courseScore) { this .courseScore = courseScore; } public String toString(List<CourseScore> list){ StringBuffer student = new StringBuffer(" 学号:"+ this .id+" 姓名:"+ this .name+" 年龄:"+ this .age); for (CourseScore c:list){ String course =" 课程号:"+().getId()+" 课程名:"+().getName()+" 课程成绩:"+(); (course); } return (); } public static void main(String[] args) { // TODO