[英]Setter Getter Arrays Java
有人可以幫我解決一個小問題。 例如,我想為1個學生設置3個講座,但是當我嘗試該課程時,我無法設置講座。
student.setStudentLecture(lecture);
student.setStudentLecture(lecture1);
public class Student {
private Lecture[] lecture;
public void setStudentLecture(Lecture[] lecture) {
this.lecture = lecture;
}
public Lecture[] getStudentLecture() {
return lecture;
}
}
您正在使用演講對象數組,並使用兩個不同的數組引用覆蓋同一數組。 因此,它不起作用。 使用以下代碼:
public class Student {
private Lecture[] lecture;
public void setStudentLecture(Lecture[] lecture) {
this.lecture = lecture;
}
public Lecture[] getStudentLecture() {
return lecture;
}
public static void main(String[] args) {
Student student = new Student();
Lecture[] lectures = new Lecture[3];
lectures[0] = new Lecture("Physics");
lectures[1] = new Lecture("Mathematics");
lectures[2] = new Lecture("Chemistry");
student.setStudentLecture(lectures);
Lecture[] lectures1 = student.getStudentLecture();
for (int i = 0; i <lectures1.length; ++i) {
System.out.println(lectures1[i].getName());
}
}
}
public class Lecture {
private String name;
public Lecture(String name) {
this.name = name;
}
public String getName(){
return name;
}
}
由於二傳手也是數組,因此您可以創建“講座數組”並將其設置為“學生”。
樣品:-
Student student = new Student();
Lecture lecture = new Lecture();
Lecture lecture1 = new Lecture();
Lecture[] lectureArr = new Lecture[]{lecture, lecture1};
student.setStudentLecture(lectureArr);
另外,您還有studentLecture作為數組,那么為什么要兩次分配不同的數組,您可以組合兩個數組並進行分配。
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