笔记备份：2025-08-21 22:32:27

.obsidian/plugins/keep-the-rhythm/data.json

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A1-Work/语言/Java/基础学习.md

@@ -561,7 +561,18 @@ classDiagram
 唯一的用途就是为其他线程提供服务。
 
 ### 同步
+锁对象 `ReentrantLock` 和 `synchronized`。
+```Java
+// 锁对象
+private Lock bankLock = new ReentrantLock();
+// 条件对象，可以用来调用 await（条件不满足先等待）、signalAll（唤醒所有等待的线程）、signal（随机唤醒一个等待的线程）
+private Condition sufficientFunds = bankLock.newCondition();
 
+// 获取锁
+bankLock.lock();
+// 释放锁
+bankLock.unlock();
+```
 
 ## JDK 特性