程序无法编译：“非法启动类型”

Question

我写了这个程序，我不断得到：

“ Grades.java:10: 错误：类型的非法开始”

import java.util.Scanner;
public class Grades
{
    final int StudentGrades = 3;

    int total;
    double average;
    int[] GradesArray = new int[StudentGrades];
     Scanner keyboard = new Scanner(System.in);
    for (int i = 0; i < GradesArray.length; i++)
    {
        System.out.print("Enter grades for Student" + (i+1));
        GradesArray[i] = keyboard.nextInt();
        total += GradesArray[i];
    }

        average = total/StudentGrades;

        if(average >= 90 && average <= 100)
          System.out.print("you Got a A");
        else if(average >= 80 && average <= 89)
         System.out.print("you Got a B");
        else if (average >= 70 && average <= 79)
         System.out.print("you Got a C");
        else if (average >= 60 && average <= 69)
          System.out.print("you Got a D");
          else
            System.out.print("you Got a F");

          for(int i = 0; i < GradesArray.length; i++)
        {
            System.out.println("Grades for exam #" + (it1)+"are as follows " + GradesArray[i]);

        }

}

Answer 1

您需要一个包含从 for 循环向下的所有内容的启动方法。

通常：

public static void main (String [] args) {

}