smartfoxserver - Java error java.util.concurrent.ConcurrentHashMap.keySet -


hey guy's getting error: can guy's possibly try fix this? or see whats wrong post fix or

thanks alot guy's :)

exception in thread "extensionhandler-1" java.lang.nosuchmethode rror: java.util.concurrent.concurrenthashmap.keyset()ljava/util/concurrent/concu rrenthashmap$keysetview;         @ aerivial.requests.aqw.getaction.process(getaction.java:196)         @ it.gotoandplay.smartfoxserver.controllers.extensionhandler.processeve nt(extensionhandler.java:535)         @ it.gotoandplay.smartfoxserver.controllers.extensionhandler.run(extens ionhandler.java:344)         @ java.lang.thread.run(thread.java:619)

the error code:

        concurrenthashmap tgtbuffdebuffs = (concurrenthashmap)usertgt.properties.get(users.buffs_debuffs);          (iterator = tgtbuffdebuffs.keyset().iterator(); i.hasnext(); ) { int auraid = ((integer)i.next());           aura aura = (aura)world.instance.auras.get(integer.valueof(auraid));           if ((aura.getdamage() >= 0.0d) && (!aura.getcategory().equals("d"))) {             damage = (int)(damage * aura.getdamage());           }         }

looks have library need java8 , run under version lower 8.

in java 8 api has changed:

in java 8 keyset method returned object 

concurrenthashmap.keysetview<k,v>

in java 7 

set<k>

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