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It does not have to be an integer. I'm doing something similar to making a calculator. how does the regex class work? I've never used it.

I have an array list of different kinds of objects, and need to know if each object is a number or a character (a few specific characters). How do I find out if it is a number or not? I can easily...

or make it a void method instead of double

public static void calcTip(double bill, double RATE)

Hi there, I'm a Computer Science major. I'm not as good at it as most people I didn't start learning anything about CS really until I started it in school (3 years ago, but I took a year off as...