Scala值类型和String类型转换

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基本类型转换String

object TypeDemo15 {   def main(args: Array[String]): Unit = {     var a:Int = 5     println((a+"").isInstanceOf[String])   } }  

String 类型转基本类型

object TypeDemo16 {   def main(args: Array[String]): Unit = {     var s2:String = "12"      var num1:Int = s2.toInt     var num2:Float = s2.toFloat     var num3:Double = s2.toDouble     var num4:Long = s2.toLong      println(s2.isInstanceOf[String])      println(num1.isInstanceOf[Int])     println(num2.isInstanceOf[Float])     println(num3.isInstanceOf[Double])     println(num4.isInstanceOf[Long])   } }  

注意事项

object TypeDemo14 {   def main(args: Array[String]): Unit = {     var s4 = "12.5"      println(s4.toInt)  // 此处会报错     println(s4.toDouble.toInt)   }  }  

文章来源: https://blog.csdn.net/chen18677338530/article/details/91432128