i need code in java language

Design the Number puzzle game using JavaFx GUI library. Each level will display one crossword Math block. Use the following blocks for 4 levels of the games. Use the Next button to move to the next level. 7 + 5 = 7 8 + 4 = + + + + 1+ 4 = 3 + 8 = + = 17 + 7 + = 1 5 + 6 = + 6 + 5 = + + + 1 + = 10 II = + = 22 As a developer you have to make sure of the number validation. If user entered non-numeric value then program must raise Input MismatchException. Also, create a custom Exception named NullValueException to validate the number block. On the click of Next Button, if user left number block as null then program must raise NullValueException