Scala的内部类

与java中内部类不同的是，Scala里面，内部类是属于对象的

class Outer(val name: String) { outer => //val outer
            class Inner(val name: String){
              def foo(b:Inner) = println("Outer: " + outer.name + 
                  " Inner: " + b.name)
            }
        }

def main(args: Array[String]) {
    
    val outer1 = new Outer("Spark")
    val outer2 = new Outer("Hadoop")
    val inner1 = new outer1.Inner("Scala")
    val inner2 = new outer2.Inner("Java")
    inner1.foo(inner1);
    inner2.foo(inner2);
}