1、模式匹配 match case

object controllAbstract {
  def main(args: Array[String]): Unit = {
    val x:Any="123";
    x match {
      case a:Int=> println("++++");
      case b:String=>println("----");
      case _ =>print(".....other type");
    }
  }
}

2、数组匹配

    val array = Array(1,2,0,3,4);
    array match {
      case Array(0)=>print("有0");
      case Array(a,b)=>print("含有两个元素");
      case Array(0 ,_*)=>print("从0开始");
      case _ =>print("other");

    }

3、成绩评定采用模式匹配

object controllAbstract {
  def main(args: Array[String]): Unit = {

    val result =  judgeGrade("A");
    print(result);
  }

  def judgeGrade (grade:String): Unit ={ 
    grade match{
      case "A" =>print("excellent");
      case "B"=>print("Good");
      case "C"=>print("Just so so");
      case "D"=>print("fail");
    }
  }
}