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I solved it.
I used the subclass whitout the extends.
So public static void calculate() {
And then I would let the program run that subclass when het needs to calculate something.
And it...

The thing is I have a file that I read line by line (in the class readResearchfile)
But I have to make the same calulation over and over again for certain parts, and in diffrent loops.
So I was...

I have made this subclass:



public static void cacluate() extends readResearchfile {
//
}


But it gives me this error: Syntax error on token "extends", throws expected