A class on exception handling的用法和样例：
- Drawing a component in UML 2 is now very similar to drawing a class on a class diagram.
- I enjoy poetry too. I recently did a class on figures of speech. You just used a simile didn't you?
- The designer tried to reference a class on a particular Toolbox tab, but the class does not exist.
- Adriana:I enjoy poetry too,I recently did a class on figures of speech.You just used a simile didn't you ?