I want to make a calculator program in Java GUI like Picture 1 and 2.

1. The main calculator shall have a Settings button.
2. The pressing of Settings button shall bring the Settings window.
3. Settings window shall allow users chose Background color, Foreground color, Keypad Color, Font Type, Number of digits after decimal point.
4. Settings window shall have Ok button. (You can use any proper SWING component to implement)
5. The pressing of Ok button in the Settings window shall bring the Main calculator window.
6. The current Settings shall affect the look and feel of the Main window.
7. (Please note: Your design not necessarily exactly similar to the ones in the Figures.)

789 5 1 2 3 Settings Background Black Foreground Red Keypad Color Blue Decimal 1 Font Type Courier_New Bold 12 OK 789 5 1 2 3 Settings Background Black Foreground Red Keypad Color Blue Decimal 1 Font Type Courier_New Bold 12 OK