如何将void方法的结果存储到int数组方法中

Question

我试图将公共静态void readGrades()的结果存储到方法数组int[]grades中。但是我没有这样做。我试过数组列表和其他东西，但不幸的是。

public static int[]grades;
public static void main(String[] args) {
        readGrades();
}
public static void readGrades(){
    Scanner in=new Scanner(System.in);
    System.out.print("How many students there are : ");
    int numberOfStudents=in.nextInt();
    for(int i=1;i<=numberOfStudents;i++){
    System.out.print("Enter the grade of the students : ");
    int grades1=in.nextInt();
    grades1++;
}

Answer 1

您不需要声明< code>grades[] static，也可以用< code >局部声明的int[]来实现，如下所示:

public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        System.out.print("How many students there are : ");
        int numberOfStudents=in.nextInt();
        int[] grades = new int[numberOfStudents];
        readGrades(grades, in);
        // here you can write code to play with grades array
}
public static void readGrades(int[] grades, Scanner in){
    for(int i=0;i<numberOfStudents;i++){
         System.out.print("Enter the grade of the students : ");
         grades[i]=in.nextInt();
    }
}

希望这有帮助。

Answer 2

试试看：

public static int[] grades;
public static void main(String[] args) {
        readGrades();
}
public static void readGrades(){
    Scanner in=new Scanner(System.in);
    System.out.print("How many students there are : ");
    int numberOfStudents=in.nextInt();
    grades=new int[numberOfStudents];
    for(int i=0;i<numberOfStudents;i++){
        System.out.print("Enter the grade of the students : ");
        int grade=in.nextInt();
        grades[i]=grade;
     }
}

您必须知道这将把数据存储在等级数组中，您可以使用它然后调用方法readGrades（），尝试在readGrades（）之后编写打印等级的代码。