文章來自:http://www.cnblogs.com/hark0623/p/4196261.html 轉載請注明
代碼如下:
/**
* 模式比對
*/
case class Class1(param1: String, param2: String)
case class Class2(param1: String)
object Case {
def main(args: Array[String]) {
//通過模式比對進行條件判斷
val test1: String = "1"
val result1 = test1 match {
case "1" => {
"one"
}
case "2" => "two"
case _ => "other"
}
println(result1)
//通過模式比對進行條件判斷,可自定義條件
val test2: Int = 1;
val result2 = test2 match {
case i if i + 1 == 2 => "one"
case i if i + 1 == 3 => "tow"
case _ => "error"
}
println(result2)
//通過模式比對進行類型條件判斷
val t3 = 1
println(Test3(t3))
//通過模式比對進行類型條件判斷
val t4 = "1"
println(Test3((t4)))
//通過模式比對進行類的判斷與執行
val test5 = Class1("1", "2")
ClassMatch(test5)
val test6 = Class2("3")
ClassMatch(test6)
}
def ClassMatch(classTest: Any): Unit = {
classTest match {
case Class1(param1, param2) => {
println("Class1:" + param1 + "_" + param2)
}
case Class2(param1) => {
println("Class2:" + param1)
}
case _ => println("error")
}
}
def Test3(data: Any): String = {
data match {
case x: Int => "Int"
case x: String => "String"
case _ => "unkown"
}
}
}
輸出如下:
one
one
Int
String
Class1:1_2
Class2:3