java - 将两个变量的输入传递给数组并传递给引用类中的构造函数并打印它们
问题描述
我很难将两个变量的输入传递到一个数组中,并在引用类的构造函数中传递数组的值。如有必要,我可以提供更多代码。非常感谢您的帮助!
目前,这是我所在的位置:
System.out.print("No. of subjects to enroll: ");
choice = keyboard.nextInt();
System.out.println("-------------------------------");
String code;
int grade;
String[] codeArray = new String[choice];
int[] gradeArray = new int[choice];
for (int x = 0; x < codeArray.length; x++) {
System.out.print("Code of the subject " + (x + 1) + ": ");
code = keyboard.next();
System.out.println("What's the grade for " + code + ": ");
grade = keyboard.nextInt();
codeArray[x] = code;
gradeArray[x] = grade;
int s = 0;
while (s < codeArray.length) {
// StudentGrades is the constructor where I am passing the input.
sg = new StudentGrades(codeArray[s], gradeArray[s]);
s++;
}
}
这是我通过 getter 方法获取传递的输入的部分。
int i = 0;
System.out.printf("%-5s %15s %n", "Course Code: ", "Grades: ");
while (i < codeArray.length) {
System.out.printf("%-5s %20s %n", sg.getCourseCode(), sg.getGrade());
i++;
}
这是 StudentGrades() 参考类的构造函数:
public StudentGrades(String courseCode, int grade) {
this.courseCode = courseCode;
this.grade = grade;
}
这是我得到的示例输出。如您所见,它只打印 it412 主题代码。我尝试使用参数 0 代替 S,但它也只显示 it411。
No. of subjects to enroll: 2
-------------------------------
Code of the subject 1: it411
What's the grade for it411: 90
Code of the subject 2: it412
What's the grade for it412: 91
Course Code: Grades:
it412 91
it412 91
-------------------------------
解决方案
如果 StudentGrades 代表 1 个 StudentGrade(如果这是您的意图,您应该重命名它),那么您需要在创建学生成绩时保留它们的列表。
替换此代码:
while (s < codeArray.length ) {
sg = new StudentGrades(codeArray[s], gradeArray[s]);
...
有类似的东西:
List<StudentGrades> studentGrades = new ArrayList<>();
while (s < codeArray.length ) {
sg = new StudentGrades(codeArray[s], gradeArray[s]);
studentGrades.add(sg);
...