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also i changed some code and tried again, this is the new code and the new error


private void amountToSell() {
System.out.println(textField4.toString());
amountToSell =...

I'm sorry here is the error


Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(Unknown Source)
at...

Okay, I am in the process of making this program that basically takes the different numbers that are put in, and puts text on the screen depending on which of the two options were selected. HOWEVER,...