This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
I have my program working while I am using the drop down menue, However I want to be able to select the JCheckBox and it will allow me to enter any amounts and it will do the math and fill in the monthly payment and the chart. here is my program: