Practice #10 (Defensive Programming Part 2) - Programming Technique for D4 POLBAN.
In this exercise, we will learn about assert statement (Java assertions) using DataRoles.java.
- How to display custom message of assertion using command line?
- How to display custom message of assertion ONLY for
Researcher Roles Classusing command line? - Is it possible to show all custom message of assertions? If it is possible how to do it? OR Is it ONLY possible to show custom message of the assertion that was first discovered (assertion in the earlier line)? WHY?
- Update
Engineer Tools Classusing EXCEPTION (Try-Catch) withAssertionErrorand show the message! - FIX the codes, make sure you don't have any error! Take a look to
Engineer Tools Class. We want to remove selected elements of array list.- If the assertion is ENABLED, removing elements of array list WORKS PERFECTLY.
- BUT if the assertion is DISABLED, the elements of array list are NOT REMOVED. WHY?
- The elements of array list should be able to be removed with both the ENABLED and DISABLED assertion. How to FIX the issue? Give your solution!
- At line 38, remove the package comment. Create nested packages according to the codes at the line. Then execute file DataRoles.java using the java command accompanied by an "assertion parameter for the package".
Don't forget to provide comprehensive explanations and screenshots for each number!
GLHF!
$ java DataRoles
They are a very specialized type of backend software engineer focusing on leveraging data. They operationlize and put predictive models into production, building pipelines, api and training models.
[Docker, Kubernetes, OpenShift, Tableau, MongoDB, ElasticSearch, Spark, TensorFlow, PyTorch]
Exception in thread "main" java.lang.AssertionError: Data Ops is invalid research role
at ResearcherRoles.displayRoleDesc(DataRoles.java:XX)
at DataRoles.main(DataRoles.java:XX)