Scala study notes three

scala variable understand:

package com.cxy.scala

object Hello {
  def main(args: Array[String]): Unit = {
    println("hello")
    val age: Int =20;
    val a :Short =10
    val  b :Long =20
    val c : Float=20f
    val d : Double=20
    var bln : Boolean =true
    var cha : Char ='2'
    var ii :Integer =20
    var bb :Byte =20
  }
}

scala is a fully object-oriented language, so he did not have the basic data types, so 20 is a target of the scala

In java

 

 This is no way of

In the scala:

 

 There are ways of

The data type java

 

 

into the scala value type and reference types