如何多次调用同一方法来添加内容

Question

所以即时创建一个gpa计算器，它需要4个类（或者更多，如果我想要的话）并计算字母等级和gpa权重。 我将如何使用相同的方法4次，每次添加不同的输入变量。 例如，第一次呼叫（等级）的第一个输入是80。 如果我再次调用它并输入90，我希望它存储初始80并添加90等等所以我可以计算gpa。

这是我的代码

import java.util.*;

public class GpaCalculator{
    public static void main(String[] args) {
    {
    System.out.println("Please enter your name>>>");
    Scanner stringinputs = new Scanner(System.in);
    String name = stringinputs.nextLine();
    GreatGrader();
    System.out.println();
    System.out.println(name);
    }

}

public static void GreatGrader(){

Scanner stringinput = new Scanner(System.in);
System.out.println("Please enter your course>>>");
String Course1 = stringinput.nextLine();
System.out.println("What is the weight of this class? Normal, Honors, or AP?>>>");
String weight = stringinput.nextLine();
System.out.println("What is your grade in the class?>>>");
String grade = stringinput.nextLine();

    double gpa = 0;
    if (weight.equalsIgnoreCase("honors"))
        gpa = gpa + 1;
    else if (weight.equalsIgnoreCase("Ap"))
        gpa = gpa + 1.5;
    else if (weight.equalsIgnoreCase("normal"));

        String letter;
        Scanner in = new Scanner(System.in);
        int grades = in.nextInt();

        if (grades >= 96)
        {   gpa = 4.5; 
            letter = "A";}
        else if (grades >= 92)
        {   gpa = 4.0;
            letter = "A";}
        else if (grades >=88 )
        {   gpa = 3.5;
        letter = "B"; }
        else if (grades >= 84 )
        {   gpa = 3.0;
            letter = "B";}
        else if (grades >=76 )
        {   gpa = 2.5;
            letter = "C";}
        else if (grades >= 72)
            {gpa = 1.5;
            letter = "C";}
        else if (grades>=68)
        {       gpa = 1.0;
            letter = "D";}
        else if (grades <=67)
        {   gpa = 0;
            letter = "F";
        }
        }
}