How to display a grid using dialog box?

[januaryako]

Hi could somebody please help me. I am currently making a program that will get the average of the 3 scores of each of the 2 subjects.(math and english). I'm done making the program but the thing that I can't seem to make is how to display it inside a grid using a dialog box. I tried using special alt keys to manually make it but it didn't work. Here's my code:

import javax.swing.*;
public class average
{
  public static void main(String[]args)
  {
    int eng1,eng2,eng3,math1,math2,math3;
   double ave1,ave2;
   String S1;
    S1 = JOptionPane.showInputDialog("Enter 1st Quiz Grade in English: ");
    eng1 = Integer.parseInt(S1);
    S1 = JOptionPane.showInputDialog("Enter 2st Quiz Grade in English: ");
    eng2 = Integer.parseInt(S1);
    S1 = JOptionPane.showInputDialog("Enter 3st Quiz Grade in English: ");
    eng3 = Integer.parseInt(S1);
    S1 = JOptionPane.showInputDialog("Enter 3st Quiz Grade in English: ");
    math1 = Integer.parseInt(S1);
    S1 = JOptionPane.showInputDialog("Enter 3st Quiz Grade in English: ");
    math2= Integer.parseInt(S1);
    S1 = JOptionPane.showInputDialog("Enter 3st Quiz Grade in English: ");
    math3 = Integer.parseInt(S1);
   ave1=(math1+math2+math3)/3;
   ave2=(eng1+eng2+eng3)/3;
   JOptionPane.showMessageDialog(null,
                                "\nSubject                      1       2     3"
                               +"\nEnglish       " +"               "+eng1+"    " +eng2+"   "+eng3
                               +"\nMathematics   " +"        "+math1+ "    " +math2+ "   " +math3
                               +"\n Math    Gen Ave"+ave1
                               +"\n English Gen Ave"+ave2,"Report", JOptionPane.INFORMATION_MESSAGE);
}
}

[fatabass]

I think you should remove the + after null, and what is ave ?

[januaryako]

ohh sorry forgot to remvoe the + after the null, wait let me fix it. the ave should be only one for each subject hehe

[januaryako]

done fixing the bugs. Can somebody teach me how to display it output inside a grid in a dialog box? Thank you