AverageScore = ((0.30*Test1)+(0.30*Test2)+(0.40*Final));
    
if ((AverageScore >= 90.000) && (AverageScore <= 100.000))
    {
    char LetterGrade = A;
    }
    
if ((AverageScore >= 80.000) && (AverageScore < 90.000))
    {
    char LetterGrade = B;
    }
    
if ((AverageScore >= 70.000) && (AverageScore < 80.000))
    {
    char LetterGrade = C;
    }
        
if ((AverageScore >= 60.000) && (AverageScore < 70.000))
    {
    char LetterGrade = D;
    }
        
if ((AverageScore < 60.000))
    {
    char LetterGrade = F;
    }

switch (LetterGrade) {
        
    case A:     comment = "GREAT!";    break;
    case B:    comment = "Good work."; break;
    case C:    comment = "Just so-so."; break;
    case D:    comment = "Better luck next time."; break;
    case F:    comment = "Better luck next time."; break;
    default: comment = "Call DJ, something has gone wrong.";
    }
            
        
JOptionPane.showMEssageDialog (null, "Test One Score: " + (Test1) "/n"
            + "Test Two Score: " + (Test2) "/n"
            + "Final Exam Score: " + (Final) "/n"
            + "Test Average: " + threeDigits(AverageScore) "/n"
            + comment, "Program 2 by DJ Garrison",
             "OOPS",JoptionPane.PLAIN_MESSAGE);