201671010146 2017-2 "The ninth Week Java learning sentiment"

this week learned about exceptions and assertions.

Exceptions are divided into internal (set) exceptions and create class exceptions (custom exceptions), while run-time exceptions (such as stack null) are unchecked exceptions, that is, non-checked exceptions, non-runtime exceptions are check exceptions, which are checked for exceptions.

All exceptions are inherited by Throwable and are broken down into error and exception.

When an exception is thrown, a method may throw multiple checked exception types (that is, a method must declare all exceptions), separated by ",".

In class before they have to see, so better understand, but write the program when some cards, but no previous several times so serious, there will be basic ideas, later study will try to find and solve the problem.

PS: Task Nine does not ...

201671010146 2017-2 "The ninth Week Java learning sentiment"