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)
  }
}