Class Design Describe inheritance and its benefits Develop code that demonstrates the use of polymorphism; including overriding and object type versus reference type 开发代码来示范多态 Determine when casting is necessary Use super and this…

Exceptions 区分checked excpetion,unchecked exception,Errors Create a try-catch block and determine how exceptions alter normal program flow Describe the advantages of Exception handling Create and invoke a method that throws an exception R…