Looking into implementation of ConcurrentHashMap, I see that when trying to manipulate it(put/remove), value is found and this value is then used as lock for synchronized code which performs actual manipulation. This way only that bucket is locked where value actually exists. I also see a class Segment declared and in many resources available online its mentioned that this is
Tag: concurrenthashmap
“Undefined reference: .. ConcurrentHashMap.keySet()” when building in Java 8
i have a project, and i am build this project with jdk 6,7,8 and my target is 1.6 when i build jdk 8 i get this error: Undefined reference: java.util.concurrent.ConcurrentHashMap.KeySetView java.util.concurrent.ConcurrentHashMap.keySet() since i have this code in that line: how can avoid error, i made some search in internet, and since java 8 changed its return type keyset, i got