Java Condition Variables: await/signal vs wait/notify
A Java condition variable gives one lock several wait sets. How await() and signal() work, why one Condition hangs a buffer, and a bounded buffer done right.
java-locks
3 PostsReentrantLock in Java: tryLock, Fairness and Interrupts
A fair ReentrantLock still lets tryLock() cut the line, and a forgotten unlock() outlives its thread. ReentrantLock explained with a lab, dumps and numbers.
Java Deadlock: Detect It, Read the Dump, Prevent It
Found one Java-level deadlock in a thread dump? How to read it, what ThreadMXBean misses (virtual threads, pool starvation), and the fixes that hold.