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
Overview A priority queue is an interesting data structure in Java. The key term here is “priority”. That means the queue is ordered by priority of the elements, not the order they are added. Let’s consider an example: When that function is run, the output is: As you can see, the order of elements in … Read more