Java ConcurrentHashMap.get() is a method in the Java ConcurrentHashMap class that retrieves the value associated with a specific key in a thread-safe manner. It provides efficient access to elements in a concurrent environment, where multiple threads may be reading and writing to the map simultaneously. Introduced in Java 2004 with Java 5, get() is a critical method for managing key-value pairs in a concurrent map, ensuring thread safety and high performance.

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