目录1. synchronized 锁2. ReentrantLock（可重入锁）3. ReadwriteLock（读写锁）4. StampedLock（Java 8+）5. 显式锁 vs 隐式锁6. 锁优化策略（JVM 对 synchronized 的优化）7.
While poking around the questions, I recently discovered the assert keyword in Java.At first, I was excited.Something useful I didn\'t already know!A more efficient way for me to check the validity of
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