java concurr,Java错误java.util.concurrent.ConcurrentHashMap.keySet

Hey guy's am getting this error:

Can you guy's possibly try to fix this? or see whats wrong post a fix or something

Thanks alot guy's :)

Exception in thread "ExtensionHandler-1" java.lang.NoSuchMethodE

rror: java.util.concurrent.ConcurrentHashMap.keySet()Ljava/util/concurrent/Concu

rrentHashMap$KeySetView;

at aerivial.requests.aqw.GetAction.process(GetAction.java:196)

at it.gotoandplay.smartfoxserver.controllers.ExtensionHandler.processEve

nt(ExtensionHandler.java:535)

at it.gotoandplay.smartfoxserver.controllers.ExtensionHandler.run(Extens

ionHandler.java:344)

at java.lang.Thread.run(Thread.java:619)

The error Code:

ConcurrentHashMap tgtBuffDebuffs = (ConcurrentHashMap)userTgt.properties.get(Users.BUFFS_DEBUFFS);

for (Iterator i = 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());

}

}

解决方案

Looks like you have a library which need java8 and you run under a version lower than 8.

In java 8 the api has changed:

In java 8 the keySet method returned an object

ConcurrentHashMap.KeySetView

In java 7

Set