将两个变量的输入传递给数组并传递给引用 class 中的构造函数并打印它们

Question

我很难将两个变量的输入传递到一个数组中，并在引用的构造函数中传递数组的值 class。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() 引用的构造函数 class:

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 
-------------------------------

Answer 1

如果 StudentGrades 代表 1 个 StudentGrade（如果是这样的话，您应该重命名它）那么您需要在创建学生成绩时保留一份列表。

替换此代码：

while (s < codeArray.length ) {
  sg = new StudentGrades(codeArray[s], gradeArray[s]);
  ...

与类似的东西：

List<StudentGrades> studentGrades = new ArrayList<>();
while (s < codeArray.length ) {
  sg = new StudentGrades(codeArray[s], gradeArray[s]);
  studentGrades.add(sg);
  ...

将两个变量的输入传递给数组并传递给引用 class 中的构造函数并打印它们

Passing the inputs of two variables to an array and into the constructor in the reference class and printing them

java

arrays

reference

class