Oracle has two products that implement Java Platform Standard Edition (Java SE) 8: Java SE Development Kit (JDK) 8 and Java SE Runtime Environment (JRE) 8. JDK 8 is a superset of JRE 8, and contains everything that is in JRE 8, plus tools such as the compilers and debuggers necessary for developing applets and applications. JRE 8 provides the libraries, the Java Virtual Machine (JVM), and other components to run applets and applications written in the Java programming language. Note that the JRE includes components not required by the Java SE specification, including both standard and non-standard Java components.（原文大意：JDK是JRE的超集，即父集，JRE所包含的一切東西JDK裡面都有，JRE只是JAVA程式執行時候所需要的環境，而我們開發者程式設計師來說還需要編譯器，偵錯程式等工具，API這些都是JRE所沒有的。而JRE是包括JVM，還有庫，元件等）
The following conceptual diagram illustrates the components of Oracle's Java SE products:

原文：https://blog.csdn.net/uniquewonderq/article/details/50461262 
版權宣告：本文為博主原創文章，轉載請附上博文連結！