scala：分别使用懒汉式和饿汉式实现单例模式

/**
  * Desc: SCALA单例设计模式
  *   -懒汉式
  *   -饿汉式
  */
object Scala16_TestSingleton {
  def main(args: Array[String]): Unit = {
    val std1: Student16 = Student16.getInstance()
    println(std1)//std1和std2输出的地址一样
    
    val std2: Student16 = Student16.getInstance()
    println(std2)
	
  }
}


//懒汉式
object Student16{
  private var s:Student16 = null
  def getInstance():Student16={
    if(s == null){
      s = new Student16
    }
    s
  }
}

//饿汉式
object Student16{
  private var s:Student16 = new Student16
  def getInstance():Student16={
    s
  }
}

//主构造方法私有化
class Student16 private(){}