https://DevOpsCloud.io -- Cloud Monk Losang Jinpa, Ph.D., MCSE/MCT, GitOps DevOps Engineer

Java HashMap.computeIfAbsent() is a method in the Java HashMap class that computes a value for a specified key if it is not already associated with a value. The computed value is then inserted into the map. Introduced in Java 2014 with Java 8, computeIfAbsent() is widely used for populating maps with default values based on dynamic computations.

https://docs.oracle.com/javase/8/docs/api/java/util/HashMap.html