GPA Program

[yankeesfan]

i wrote the following code for a dialog box to enter grades and calculate gpa. is there any way to make it
shorter? like can i use object arrays and initialize it in a for loop? thank you

import javax.swing.*;
public class GPA
{
    public static void main(String args[])
    {
        int Counter=0;
        while(Counter!=1)
        {
            String Name=JOptionPane.showInputDialog("Enter Student Name");
            JTextField[] Subj=new JTextField[6];
            
            for(int i=0;i<Subj.length;i++)
            {
                Subj[i]=new JTextField();
            }
                    
            double[] Credits={1.0, 1.0, 1.0, 1.0, 1.25, 0.75}; 
            double[] Points=new double[6]; //Letter Grade into Points
            double TotalCredits=0.0; 
            double GPA=0.0;
            Object[] Message={
            "Enter English Grade: ",Subj[0],
            "Enter Math Grade",Subj[1],
            "Enter Social Studies Grade",Subj[2],
            "Enter Art Grade",Subj[3],
            "Enter Science Grade",Subj[4],
            "Enter P.E Grade",Subj[5]
            };
            
            int Value = JOptionPane.showConfirmDialog(null, Message, 
                    "Enter Letter Grade", JOptionPane.OK_CANCEL_OPTION); 
            
            String[] Letter=new String[6];
            for(int i=0;i<Subj.length;i++)
            {
                Letter[i]=Subj[i].getText();
            }
            
            for(int i=0;i<Letter.length;i++)
            {
                switch(Letter[i])
                {  
                    case "A":
                         Points[i]=4.00;
                        break;
                    case "A-":
                        Points[i]=3.67;
                        break;
                    case "B+":
                        Points[i]=3.33;
                        break;
                    case "B":
                        Points[i]=3.00;
                         break;
                    case "B-":
                     Points[i]=2.67;
                        break;
                    case "C+":
                        Points[i]=2.33;
                        break;
                    case "C":
                        Points[i]=2.00;
                        break;
                    case "C-":
                        Points[i]=1.67;
                        break;
                    case "D+":
                        Points[i]=1.33;
                        break;
                    case "D":
                        Points[i]=1.00;
                        break;
                    case "D-":
                        Points[i]=0.67;
                        break;
                    case "F":
                        Points[i]=0.00;
                        break;
                    default:
                        JOptionPane.showMessageDialog(null,"One of the"
                                + " Inputted Grades is Not Valid");
                        System.exit(0);
                        break;
                }
            }
         
            //calculate and display GPA
            for(int j=0;j<Letter.length;j++)
            {
                TotalCredits+=Points[j]*Credits[j];
                GPA=TotalCredits/6;
            }
            JOptionPane.showMessageDialog(null,String.format("Student Name: %s"
                    + "\nGPA: %.2f",Name,GPA));
            
            int value=JOptionPane.showConfirmDialog(null,"Would You Like To "
                    + "Calculate Another GPA?","",JOptionPane.YES_NO_OPTION);
            if(value==JOptionPane.NO_OPTION)
            {
                JOptionPane.showMessageDialog(null,"Thank You For Using This "
                        + "GPA Calculator");
                Counter++;
            }
        }
    }
}