import scala.collection.mutable.ListBuffer object Test1111 { def main(args: Array[String]): Unit = { case class Student( name: String, zongfen: Int, var mingci: Int ) val list = ListBuffer[Student]() //并列 list
在scala中List的用法 | //List:列表 特点:有序 链表 //分类:可变 与不可变 import scala.collection.mutable.ListBuffer object Test1 { def main(args: Array[String]): Unit = { //1.建立一个不可变序列的列表 val l1 = List(1, 2, 3) //2.输出 第一个 下标从0开始 println(l1(0)) // //...
import models.UserModelimport scala.collection.mutable.ListBufferclass UserDao{//加载所有的用户def loadUsers(): ListBuffer[UserModel] = { val users = new ListBuffer[UserModel]() val source = scala.io.Source.fromFile("E:\\untitled\\dyh2\\user.txt") for(line <- source.getLines()){ val Arr...
import scala.collection.mutable.ListBuffer import scala.io.Source case class Student(name:String,yuwen:Int,shuxue:Int,yingyu:Int,zongfen:Int,pinjunfen:Int) object Test1233 { def main(args: Array[String]): Unit = { //0.准备一个空的List val list=ListBuffer[Student]() //1.读取文件-按行读...
import scala.collection.mutable.ListBuffer //图书,数据操作层 class BookDao { //加载图书。从文件中读入 def loadBooks(): ListBuffer[BookModel] = { val books = new ListBuffer[BookModel]() val source = scala.io.Source.fromFile("E:\\untitled\\dyh2\\book.txt") ...
练习关于在scala中case的用法 | import scala.collection.mutable.ListBuffer //1 case class Book(id: String, name: String, author: String, price: Double, quantity: Int) object Test1 { def main(args: Array[String]): Unit = { //2 var bookList =ListBuffer[Book]() ...
焕新 知乎知学堂 等你来答 切换模式 登录/注册 喵鱼 package test33 import scala.collection.mutable.ListBuffer object test_order { def main(args: Array[String]): Unit = { case class Student( name:String, zongfen: Int, var mingci:Int ...