scala泛型，scala的重寫

object ScalaFiledOverride {def main(args: Array[String]): Unit = {val obj1:AAA = new BBBval obj2:BBB = new BBBprintln("obj1.age=" + obj1.age + "\t obj2.age=" + obj2.age)}
}class AAA {val age: Int = 10 // 會生成public age()
}class BBB extends AAA {override val age: Int = 20 //會生成public age()
}