@@ -0,0 +1,274 @@
+public class NegativeNumberException extends Throwable %7B%0A   private static final String ANSI_RED = %22%5Cu001B%5B31m%22;%0A   private static final String RESET = %22%5Cu001B%5B0m%22;%0A%0A   public void what() %7B%0A       System.out.println(ANSI_RED + %22Cannot use negative number!%22 + RESET);%0A   %7D%0A%7D%0A

Create NegativeNumberException.java