Scala - 一種programming language

http://www.scala-lang.org/

Scala is

• Express common programming patterns in a concise, elegant, and type-safe way
• Smoothly integrates features of object-oriented and functional languages
• Enabling Java and other programmers to be more productive
• Code sizes are typically reduced by a factor of two to three

Hello World範例
以下是用Scala編寫的典型的Hello World程式：

object HelloWorld extends App {
   println("Hello, world!")
 }

或

object HelloWorld {
   def main(args: Array[String]) {
     println("Hello, world!")
   }
 }

Reference