单选题
发布日期:2020-04-10
Boolean exists=Directory.exists (“prefs”);
Boolean exists=(new File(“prefs”)).isDir();
Boolean exists=(new Directory(“prefs”)).exists();
Boolean exists=(new File(“prefs”)).isDirectory();
Boolean exists=true; Try{ Directory d = new Directory(“prefs”); } catch (FileNotFoundException e) { exists = false; }
题王网让考试变得更简单
扫码关注题王,更多免费功能准备上线!
此试题出现在
其他考试
造粒工段生产任务是什么?
小蓟饮子的主治病证是()
开启气瓶瓶阀时,操应该站在()位置。
企业的营销管理过程,也就是市场营销的计划、执行和()过程。
1914~1918年中国民族工业得到发展的原因有( )。①辛亥革命冲击封建制度②清政府允许民间办厂③北洋军阀分裂④帝国主义忙于一战,暂时放松对华经济掠夺
简述柴胡在小柴胡汤、补中益气汤中的配伍作用。
纳米晶体材料分为几类?它们分别用于何种材料?
甲公司在经营过程中,对内部控制做得比较好,比如现金日清日结且安排专人定期检查;公司入口设立门禁系统;对于机密的商业文件使用保险箱储存,并由专人负责看管;存货由仓库负责管理,所有物质都应当办理入库后,再按照审核审批控制要求办理出库手续,并且安排专人定期对存货进行盘点,这些体现的是()
在欧美一些国家里,本国历史上出现的第一张日报有()
垂直位颈椎牵引
暂无相关推荐~
Which determines if “prefs” is a directory and exists on the file system?()
One factor that determines the frequency of an alternator is the().
One factor that determines the frequency of an alternator is the().
One factor that determines the frequency of an alternator is the().
One factor that determines the frequency of an alternator is the().
During cluster fallover testing,the administrator determines that additional wor...
People tend to think that children’s IQ is ______ determines how well they are g...
Which factor determines the ring dam size for a fuel oil, tubular bowl type, cen...
The main factor which determines the output of each cylinder is ()
What determines the number of events occurring in a cycle of operation in an int...