在c#中using和new这两个关键字有什么意义,请写出你所知道的意义?using 指令 和语句 new 创建实例 new 隐藏基类中方法。
using/new各自的意义
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在J2ee中,以下各项中,()正确阐述了创建InputStreamReader的方式。 A、new InputStreamReader(new FileInputStream("data"));B、new InputStreamReader(new FileReader"data"));C、new InputStreamReader(new BufferedReader("data"));D、new FileInputStream("data")
有关new关键字的描述正确的是哪项?() A、创建对象实例的时候可以不使用new关键字B、new所创建的对象不占用内存空间C、new会调用类的构造器来创建对象D、new所创建的对象一定存在引用变量
An Active Directory database is installed on the C volume of a domain controller. You need to move the Active Directory database to a new volume What should you do()A、Move the ntds,dit file to the new volume by using Windows Explorer.B、Copy the ntds,dit file to the new volume by using the ROBOCOPY command.C、Move the ntds,dit file to the new volume by using the Files option in the Ntdsutil utility .D、Move the ntds,dit file to the new volume by running the Move-item command in Microsoft Windows powerShell.
下列语句中,可以创建数组实例的有()。A、int[] ia = new int [15];B、float fa = new float [20];C、char*+ ca =“Some String”;D、Object oa = new float[20];E、Int ia [][] =(4,5,6)(1,2,3)
创建一个ArrayList集合实例,该集合中只能存放String类型数据,下列()代码是正确的A、ArrayList myList=new ArrayList()B、ArrayListmyList=new ArrayList;myList=new ArrayList()D、ArrayList()
AWT中创建一个标识有“确定”按钮的语句是()A、TextField b = new TextField(“确定”);B、Checkbox b = new Checkbox(“确定”);C、Buttn b = new Button(“确定”);D、Label b = new Label(“确定”);