Java ConcurrentSkipListMap.put() is a method in the Java ConcurrentSkipListMap class that inserts a key-value pair into the map while maintaining the keys in sorted order. It is thread-safe and allows for concurrent access by multiple threads. Introduced in Java 2004 with Java 5, put() is commonly used in multi-threaded applications where sorted order is needed along with thread safety.

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