参考学习

• What is the difference between JDK and JRE?：https://stackoverflow.com/questions/1906445/what-is-the-difference-between-jdk-and-jre
• Oracle vs OpenJDK：https://www.educba.com/oracle-vs-openjdk/
• Differences between Oracle JDK and OpenJDK：https://stackoverflow.com/questions/22358071/differences-between-oracle-jdk-and-openjdk
• 彻底弄懂 Java 的移位操作符：https://juejin.cn/post/6844904025880526861