3:03:26 WARN]: [me.caseload.knockbacksync.shaded.com.github.retrooper.packetevents.PacketEventsAPI] PacketEvents caught an unhandled exception while calling your ...

SegmentedCounter类有一个counters数组和一个locks数组。每个计数器都有一个与之对应的锁，这使得线程可以独立地更新不同的计数器，而不会相互干扰。当然，这个简单的例子并没有考虑一些高级的并发问题，比如锁的粒度选择、锁争用和公平性等问题。 了不起在前 ...

It came to our attention that the Java application blocker is prompting that self-assigned or untrusted applications have been blocked due to security settings. Due to this issue, some of the ...

HashMap是 Java中最常用的Map类型之一，它采用了哈希表的方式存储数据，具有快速的查找和插入速度。然而，它并不是线程安全的，如果多个线程同时对HashMap 进行读写操作，可能会导致数据不一致的问题。为了解决这个问题，Java提供了一个线程安全的Map 类型 ...

Java 7中的ConcurrentHashMap：使用了分段锁机制，存储结构为数组+链表，锁的粒度是基于段的，不支持动态扩容。Java 8中的 ...

A view of a ConcurrentHashMap as a Set of keys, in which additions may optionally be enabled by mapping to a common value. This class cannot be directly instantiated.

A colleague of mine recently ran into an issue that I have not run into myself, but found to be interesting and, in my opinion, worth blogging about here. During some distributed Java development, my ...