I have written a small Java application with a GUI that calculates mortgages. One version allows the user to calculate the mortgage payment by entering the loan amount, interest rate and term. It also allows the user to select interest rate and term choices, by clicking a button for that option and then enter the loan amount. Here is the problem, if you enter the loan amount and then select the loan option button, it clears the amount you entered. I have no idea what's causing it or where to look.
I am hoping that you can point me in the right direction without viewing the code.