to run the program first extract the file then go to cmd and enter the path of the extracted file after that type java -jar filename.jar(in this case Calculator.exe)
adding opeartion panel to output the opeartion that is bean calculated and also fix some issues of passing from an equation to another after clicking the equal button
adding 'Delete' and 'Clear all' buttons and multi calculating which means it save the number after pressing equal button to continue with the same value
adding diffrent sounds to diffrent set of buttonstyling buttons and panel, adding background image
adding panel, numeric buttons and linking all functions together