Exercise: Change the Triangle class from Triangle.java so the constructor and the setSides() method throw an IllegalArgumentException when the parameters are invalid. Change main from TryTriangle.java so instantiating the new Triangle objects is in one try block (and has its own catch clause which catches an IllegalArgumentException in which you display a message and assign a default Triangle with 1,1,1 to the ‘invalid’ Triangle variable), and the setSides calls are in another try block (and has its own catch clause which catches an IllegalArgumentException in which you display what the toString of the exception).
