Java错误java.util.concurrent.ConcurrentHashMap.keySet

Question

嘿家伙得到这个错误:你们可以尝试解决这个问题吗？或者看到什么是错误的修复或其他东西

非常感谢你的家伙:)

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)

错误代码:

        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());
          }
        }

Answer 1

看起来你有一个需要java8的库,你在低于8的版本下运行.

在java 8中,api已经改变:

在java 8中,keySet方法返回一个对象

ConcurrentHashMap.KeySetView<K,V>

在java 7中

Set<K>