Scala是基于JVM的编程语言。Java是运行在jvm上的编程语言，java源代码通过jvm被编译成class文件，然后在os上运行class文件。Scala是运行在jvm上的编程语言，scala源代码通过jvm被编译成class文件，然后在os上运行class文件

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Scala fuses object-oriented and functional programming in a statically typed programming language. It is aimed at the construction of components and component systems. This paper gives an overview of the Scala language for readers who are familar with programming methods and program- ming language design.

I picked Scala to learn in 2007 because I wanted to learn a functional language. Scala appealed because it runs on the JVM and interoperates with Java. In the end, I was seduced by its power and flexibility.