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I need to save the project after doing math operation between the cases

 
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so this is my main project i need to do math operation after the total rows like multi then add.
and this is the pathsave operation i want to add save fonction to it
 
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Welcome to the Ranch You have been moved to a more appropriate forum.

I added code tags to your code, and doesn't it look better now Unfortunately the code tags highlight poor formatting. Don't write multiple declarations on the same line (line 8). Put some spaces in your code; line 23 is very difficult to read. What's Némuro? Should that read Numéro?
Don't write } or { twice in the same line (line 55) except in array initialisers.
Change line 23 to use an array initialiser and divide it into several lines:-Design: don't subtype JFrame. You are not creating a different type of JFrame but adding components to it. Your application ISN'T A JFrame, but it HAS A JFrame. Start by writing your application to do the maths without a GUI at all. Run it from the command line and save the total to a file. Decide whether you are going to create a serialisable object to incorporate the total, or whether you are writing the total to a random access file or a text file. You will find out about both those kinds of file in the Java™ Tutorials.
Don't use Date (lines 6 and 21). Use the classes described in the Java™ Tutorials, probably LocalDate.
Why are so many fields declared in line 8? I think most of those can be changed to be local variables. Most local variables should be declared as type var.
 
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