A big selling point of Java also was a very strong built-in library, e.g. with red-black trees (TreeMap) and concurrent lock-free zero-mutex queues (ConcurrentL

A big selling point of Java also was a very strong built-in library, e.g. with red-black trees (TreeMap) and concurrent lock-free zero-mutex queues (ConcurrentLinkedQueue). No wonder competitive coding champions sometimes preferred Java as they don't had to spend time coding it from scratch.