scala的二维数组 | import scala.collection.mutable.ArrayBufferobject Test_array {// // 不可变数组// def main(args: Array[String]): Unit = {// //1 创建不可变数组// val arr1=Array(1,2,3)// //2 访问// println(s"第一个元素是:${arr1[0]}")// //如果下标超出范围 会报错// print...
object test { //复习隐式转换 //隐式转换:编译器 自动地帮我们把一种类型数据转换为另一种类型。 // 例如 int -->double //他有失败的时候(double-->int),有成功的时候 implicit def X(d:Double):Int={ println("implict X 被调用了") d.toInt } def main(args: Array[String]): Unit = { ...
objectTest4{defadd(i:Int)(implicity:Int=100):Int=i+ydefmain(args:Array[String]):Unit={implicitvalabc:Int=300implicitvala:Double=300.0varadd2=add(2)(101);println(add2)}}() A. 102 B. 103 C. 302 D. 编译出现错误,有3个相同类型的隐式值 如何将EXCEL生成题库手机刷题 如何制作...
object Timer { def main(args: Array[String]) { oncePerSecond(timeFlies) } def oncePerSecond(callback: () => Unit) { while (true) { callback(); Thread sleep 1000 } } def timeFlies() { println("time flies like an arrow...") } } 有了解情况的同学吗?报的错误是:Error (17,3)...
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publicstaticvoidmain(String[] args){ MyTask task=newMyTask(); ExecutorService es= Executors.newFixedThreadPool(5); for(inti=0;i<10;i++){ es.submit(task); } } } 上述代码中,第17行创建了固定大小的线程池,内有5个线程。在第19行,依次向线程池提交10个任务。此后,线程池...
def sayname(implicit str: String = "小陈"): Unit = { println(str) } implicit val x1:String = "小美丽" def main(args: Array[String]): Unit = { sayname("小明") sayname() sayname }}package test39object test1 { class BaserUser() { def insertUser(){println("insertUser")}implicit cl...