– 출처 : http://tutorials.jenkov.com/java-util-concurrent/concurrentmap.html – The java.util.concurrent.ConcurrentMap interface represents a Map which is capable of handling concurrent access (puts and gets) to it. The ConcurrentMap has a few extra atomic methods in addition to the methods it inherits from its superinterface, java.util.Map. ConcurrentMap Implementations Since ConcurrentMap is an interface, you need to use one of its implementations in order to use it. The java.util.concurrent package contains the following… Read More »