Đạt TrầnOverview These are the notes I took when preparing for the AWS Certified Cloud Practitioner in Jul 2022. I extract the content from various sources. You can use it to quickly review concepts. I used it as a last-minute review before the exam. It served me well. Some people asked why I took this but … Read more
Recently, I ran into a problem with the Jenkins pipeline. Specifically, the Maven tests take too much time to run. I have integration tests and unit tests. The total execution time took more than 30 minutes. In some environments, I only need to run the unit tests, not all the tests. So I wondered, is … Read more
Single Thread Executor When you want to run a task, you can start a thread or you can use the Executors to create a single thread to run the task. Consider this block: when you run the code, the output is what the task does: However, you can see that the program didn’t stop (the … Read more
Overview The Map interface is a part of the Collection framework. However, Map doesn’t implement Collection. Why is it a part of the Collection framework? It’s because Map by nature is a collection of elements. Implementations of the Map interface are used in other members of the Collection framework. One example is the HashSet class … Read more
Learn how SortedSet is implemented in Java
An introduction to the Set interface in Java