scala实例练习1

scala script脚本Demo.scala编译运行方式

object Demo {
  def main(args: Array[String]) {
    var str1 = "Dot saw I was ";
    var str2 =  "Tod";

    println("Dot " + str1 + str2);
  }
}

E:\ideaIC\bigdata\src>scalac Demo.scala
E:\ideaIC\bigdata\src>dir
2018/03/27  23:29               927 Demo$.class
2018/03/27  23:29               607 Demo.class
2018/03/27  23:24               152 Demo.scala
2018/03/27  23:09               190 Demo_class.scala
E:\ideaIC\bigdata\src>scala Demo
Dot Dot saw I was Tod

字符串插值器

字符串处理时可以直接引用变量或者表达式，省去了在拼接处理。（Scala-2.10及更高版本）

object Demo {
   def main(args: Array[String]) {
      val name = "James"

      println(s"Hello, $name")
      println(s"1 + 1 = ${1 + 1}")
   }
}