import导入``` package tools class Student { def test():Unit={

package tools

class Student {

    def test():Unit={
      println("test......")
    }
  }

import tools.Student

object demo02 {
  def main(arg:Array[String]):Unit={
    var s1=new Student()
    s1.test()
  }
}

import tools._

import tools.{Student => NewStudent}
import tools.art.Student

object demo02 {
  def main(arg:Array[String]):Unit={

    new A()
    new B()
    new C()

    var s1=new NewStudent()
    s1.test()
  }
}