scala的静态，单列模式

package com.test.scala.test

/**
 * 单例对象，这种对象不能提供构造函数
 */
object SingleObject {

  private var lastnumber=0;

  def newUnqiueNumber={lastnumber+=1;lastnumber}

  def main(args: Array[String]): Unit = {
    println(newUnqiueNumber)
    println(newUnqiueNumber)
    println(newUnqiueNumber)
    println(newUnqiueNumber)
    println(newUnqiueNumber)
    println(newUnqiueNumber)
    println(SingleObject.lastnumber)
    newUnqiueNumber
    println(SingleObject.lastnumber)
  }
}