Скачать или смотреть Woz U Learn to Code: Troubleshooting a NullPointerException with Java

Troubleshoot a NullPointerException in Java with
Woz U Software Developer Instructor Steve Bishop!
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1:35 - 3 main parts to deal with code that isn't working
1:40 - First step to fix code.
2:03 - Where is the first place to look for broken code?
2:14 - What is console?
2:33 - What does that tell you?
3:00 - How to find the problem.
4:55 - What is a front end?
5:30 - What is an API?
5:50 - What is a back end?
6:10 - Navigate to your local host.
6:24 - What is Postman and what does it do?
7:30 - Look at your controllers.
7:55 - What is a controller?
9:00 - How functions work.
9:30 - What is JPA?
10:45 - What is a database?
11:50 - The actions you can do on Postman and what they do.
14:25 - Look at the results off Postman of the error.
*Start the Troubleshoot.
15:30 - What is a “500” error?
16:08 - Look at the console to see what errors your getting.
16:30 - Just focus on the beginning of message and why.
17:10 - How to read the error message.
17:35 - How to read the problem in code.
18:12 - What to do when you run into a problem your not sure of.
20:40 - How to find the best source for solution?
25:53 - Double check if solution matches your code.
27:07 - Why the error is occuring?
27:40 - What is the arrow syntax in JavaScript?
29:18 - What is the “map method?”
33:20 - Give the database information.
34:26 - What does the component class do?
35:10 - What is a repository?
38:00 - Look at all data on the line of error.
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