1. SE-1021 Software Engineering II
4/22/2019
SE-1021 Software Engineering II
Week 6, Class 1
Questions: Quiz? Lab? HW? Class? etc.
Exception Handling (missing slides from last time)
Exercise: Handling a simple exception
Exercise: Handling JOptionPain
Tomorrow:
Checked vs. Unchecked Exceptions
Wed. Lab
Quiz: Layouts (~25%), events (~25%), exceptions (~50%)
Dr. Yoder

2. Slide style: Dr. Hornick
Swing as a Framework
Your code
Swing
SE-1021
Dr. Josiah Yoder
Slide style: Dr. Hornick

3. Slide style: Dr. Hornick
SE1021
4/22/2019
Events
Where do events come from in Java?
JButton
Where do events go to in Java?
SE-1021
Dr. Josiah Yoder
Slide style: Dr. Hornick
Dr. Yoder

4. Exception Handling Terms
Exception – An object thrown when a problem occurs Throw – Unwind the stack looking for a method that called this one that can fix the problem. Stack – A list of the method that called this one, and the method that called the method that called this one, etc. Stack Trace – Printout of the current stack
SE-1021
Dr. Josiah Yoder
Slide style: Dr. Hornick

5. Exception Handling Terms
Handle an exception – Taking care of the problem 1. “pass the buck” Pass it on to the caller of this method. 2. Catch the exception. Catch – Stop unwinding the stack and handle the exception (Yes, these are circular definitions. Hmmm…)
SE-1021
Dr. Josiah Yoder
Slide style: Dr. Hornick

6. Slide style: Dr. Hornick
(footnote)
“pass the buck” means give someone else responsibility for handling a problem
President Truman had a “Buck Stops Here” sign indicating he “caught” the exceptions…
SE-1021
Dr. Josiah Yoder
Slide style: Dr. Hornick