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Lecture 10

COIS 2240H Lecture 10: WEEK 10 session 2 LEC NOTES
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2 Pages
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Winter 2018

Department
Computing & Information Systems
Course Code
COIS 2240H
Professor
Alaadin Addas
Lecture
10

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WEEK 10 session 2 lec notes
COIS 2240
Thursday, March 15, 2018
Recap- JavaFX
How do we handple events in java?
A JavaFX application must have a start method, what does this start method have to extend
A handler class must implement the EventHandler interface, what is the method that you have to
override in order to implement that interface
Java Exceptions
Before we delve into I/O (input/outpit) we nee dto talk about exceptions
That is due to the fact the many different I/O calls require use to have exceptions handled
We handle I/O exceptions because we need to know if the file is there
- any error in opening a file or closing a file for example needs to be handled gracefully. That is
why exceptions and I/O go hand in hand
- If there is an error pertaining opening.
Handling Errors
Three are two main approaches to handlediing eroors when programming
LBYL- Look before you leap
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Description
WEEK 10 session 2 lec notes COIS 2240 Thursday, March 15, 2018 Recap JavaFX How do we handple events in java? A JavaFX application must have a start method, what does this start method have to extend A handler class must implement the EventHandler interface, what is the method that you have to override in order to implement that interface Java Exceptions Before we delve into IO (inputoutpit) we nee dto talk about exceptions That is due to the fact the many different IO calls require use to have exceptions handled We handle IO exceptions because we need to know if the file is there any error in opening a file or closing a file for example needs to be handled gracefully. That is why exceptions and IO go hand in hand If there is an error pertaining opening. Handling Errors Three are two main approaches to handlediing eroors when programming LBYL Look before you leap
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