@Overridepublic Course clone() { Course cloned = new Course(courseName); cloned.numberOfStudents = numberOfStudents; cloned.students = new Student[students.length]; for (int i = 0; i < students.length; i++) { cloned.students[i] = students[i].clone(); // 调用Student类的clone方法 } return cloned;}增加一个clone方法，实现students的深度复制

可以通过修改代码来实现对`students`的深度复制。具体的做法是在`Course`类中添加一个`clone`方法，然后在该方法中对`students`数组进行深度复制。

下面是修改后的代码：

@Override
public Course clone() {
    Course cloned = new Course(courseName);
    cloned.numberOfStudents = numberOfStudents;
    cloned.students = new Student[students.length];
    for (int i = 0; i < students.length; i++) {
        cloned.students[i] = students[i].clone(); // 调用Student类的clone方法
    }
    return cloned;
}

在这个`clone`方法中，先创建一个新的`Course`对象，并将`courseName`属性复制到新对象中。然后将`numberOfStudents`属性复制到新对象中。接下来，创建一个新的`Student`数组，长度和原来的数组相同。然后对原来的`students`数组进行遍历，在每个位置上调用`Student`类的`clone`方法，得到一个新的`Student`对象，并将其赋值给新的`students`数组相应的位置。

这样就实现了对`students`数组的深度复制。

相关问题

@Overridepublic Course clone() { Course cloned = new Course(courseName); cloned.numberOfStudents = numberOfStudents; cloned.students = Arrays.copyOf(students, students.length); return cloned;}增加一个clone类，实现students的深度复制

可以尝试这样编写 `clone()` 方法：

@Override
public Course clone() {
    Course cloned = new Course(courseName);
    cloned.numberOfStudents = numberOfStudents;
    cloned.students = new Student[students.length];
    for (int i = 0; i < students.length; i++) {
        cloned.students[i] = new Student(students[i].getName(), students[i].getAge());
    }
    return cloned;
}

这里使用了一个 for 循环来遍历原数组中的每个学生对象，并为每个学生对象创建一个新的副本，以实现深度复制。需要注意的是，这里假设 `Student` 类有一个带参数的构造方法，用于传递学生的姓名和年龄信息。如果 `Student` 类没有这个构造方法，需要根据实际情况进行修改。

John is working in Software Company as a developer, he has developed a web application following client-server architecture and he wants to implement Spring REST API on client application for getting the list of the studentsl from the database. Which of the following code snippet he will use to get the desired result?@Overridepublic List<Student> getStudent() {ResponseEntity<List<Student>> responseEntity =restTemplate.exchange(studentRestUrl, HttpMethod.GET,new ParameterizedTypeReference<List<Student>>() {});AList<Student> students = responseEntity.getBody();} return students;

The code snippet that John will use to get the list of students from the database using Spring REST API on the client application would be:

@Override
public List<Student> getStudent() {
    ResponseEntity<List<Student>> responseEntity = restTemplate.exchange(
        studentRestUrl, 
        HttpMethod.GET,
        null,
        new ParameterizedTypeReference<List<Student>>() {}
    );
    List<Student> students = responseEntity.getBody();
    return students;
}

In this code, John is using the Spring RestTemplate to send an HTTP GET request to the server-side REST API endpoint at the `studentRestUrl`. The `exchange()` method is used to send the request and receive the response, with the HTTP method type as `GET` and the `ParameterizedTypeReference` specifying the expected response type as a list of `Student` objects. The response is then extracted using the `getBody()` method of the `ResponseEntity` object and returned as a list of `Student` objects.