scala类

class Demo {
  private var value = 0

  def increment(): Unit = {
    value += 1
  }

  def current = value

}


object Test {

  def main(args: Array[String]): Unit = {
    //创建对象
    val demo = new Demo() //或者是Demo()

    demo.increment() //取值不加()  改值添加()
    val result = demo.current //定义函数没有加() 时，不能加()
    println(result)
    
  }
}