# java-core-examples

Runnable companion code for ankurm.com's Java-core / concurrency series. One Maven module per
article; each module's own README has that article's version table, quickstart, and traps.

| Module | Post |
|---|---|
| [`jmm`](jmm/) | The Java Memory Model Explained: volatile, happens-before, and Why Your Double-Checked Lock Failed |
| [`locks`](locks/) | synchronized vs ReentrantLock vs StampedLock: Benchmarks and a Decision Table |
| [`atomics`](atomics/) | Java Atomics and VarHandle: CAS, LongAdder, and When Atomics Beat Locks |
| [`vt-pinning`](vt-pinning/) | Diagnosing Virtual Thread Pinning in Production: JFR Events, jcmd, and Real Fixes |

## License

MIT - see [LICENSE](LICENSE).