2025-08-18 12:12 在这个瞬息万变的科技时代，蚂蚁集团宣布正式开源基于LLVM的JVM即时编译器Jeandle，旨在为Java语言注入新的活力。 公告中提到，以“筋斗云”作为喻体，希望Jeandle能够为JVM加足马力，拓宽其性能和生态边界，让Java如腾云驾雾般瞬息万里。

初学Java开发时，首先需配置Java环境，这包括开发环境与运行环境两部分。开发环境必须安装JDK，它包含了编写和调试程序所需的工具；运行环境则只需安装JRE，用于执行Java程序。值得注意的是，JDK已内置JRE，因此若已。

6、 下图展示了JDK、JRE与JVM三者间的关联。 7、 JVM是Java虚拟机。 8、 JVM是Java虚拟机的简称，正是它让Java语言实现了一次编写，到处运行的理想。

学习Java前需理清JDK、JRE与JVM三者之间的关联与区别。1、 JDK包含JRE，JRE包含JVM，层层依赖。2、 Java开发工具包，简称JDK，是Java开发的核心组件，内置 ...

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