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CodeGym /Courses /Java Collections /Tasks | Level 6 | Lesson 6

Tasks | Level 6 | Lesson 6

Java Collections
Level 6 , Lesson 6
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16
Task
Java Collections, level 6, lesson 6
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Find the class by its description
Class description: 1. It implements the List interface; 2. It is a private static class inside a popular utility class; 3. Accessing the list by index is not allowed. It throws an IndexOutOfBoundsException.
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Java university
9
Task
Java Collections, level 6, lesson 6
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Search for a class by its description
Replace the following words with those required: 1. ClassNameToBeReplaced - the name of a class that is a thread-safe version of ArrayList, in which all change operations (mutative operations) use a new copy of the original array.
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Justin Smith Level 41, Greenfield, USA, United States
13 December 2022
It seems like the pages with tasks are no longer giving enough dark matter to match the cost of advancing to the next page (also not compensating at all the cost of the pages without tasks). Only 25 awarded for this page, but 26 to advance, and the previous lesson page was also 26 to advance. I had almost 1500 at one point but I'm down to 461 now and getting concerned about being locked out of continuing.
Wei Cui Level 39, Newark, United States
21 April 2020
task 2 use CopyOnWriteArrayList instead of