java.lang.NullPointerException

Attempt to invoke virtual method 'int java.lang.Object.hashCode()' on a null object reference

Samebug tips0

We couldn't find tips for this exception.

Don't give up yet. Paste your full stack trace to get a solution.

Solutions on the web233

Stack trace

  • java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Object.hashCode()' on a null object reference at java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:746) at java.util.concurrent.ConcurrentHashMap.containsKey(ConcurrentHashMap.java:774) at cn.aigestudio.downloader.bizs.DLManager.dlStop(DLManager.java:267) at cn.aigestudio.downloader.bizs.DLManager.dlCancel(DLManager.java:286) at com.seowhy.video.util.CacheUtils.deleteLessonCache(CacheUtils.java:299) at com.seowhy.video.util.CacheUtils.deleteCourseCache(CacheUtils.java:397) at com.seowhy.video.adapter.UserCacheApapter$CacheViewHolder.onBtnDeteleClick(UserCacheApapter.java:110) at com.seowhy.video.adapter.UserCacheApapter$CacheViewHolder$$ViewBinder$2.doClick(UserCacheApapter$CacheViewHolder$$ViewBinder.java:34)

Write tip

You have a different solution? A short tip here would help you and many other users who saw this issue last week.

Users with the same issue

jkjk
3 times, last one
Unknown visitor
Unknown visitorOnce,
Unknown visitor
Unknown visitorOnce,
Unknown visitor
Unknown visitorOnce,
Unknown visitor
Unknown visitorOnce,
20 more bugmates