单选题Which determines if “prefs” is a directory and exists on the file system?()ABoolean exists=Directory.exists (“prefs”);BBoolean exists=(new File(“prefs”)).isDir();CBoolean exists=(new Directory(“prefs”)).exists();DBoolean exists=(new File(“prefs”)).isDi
题目
单选题
Which determines if “prefs” is a directory and exists on the file system?()
A
Boolean exists=Directory.exists (“prefs”);
B
Boolean exists=(new File(“prefs”)).isDir();
C
Boolean exists=(new Directory(“prefs”)).exists();
D
Boolean exists=(new File(“prefs”)).isDirectory();
E
Boolean exists=true; Try{ Directory d = new Directory(“prefs”); } catch (FileNotFoundException e) { exists = false; }
更多“单选题Which determines if “prefs” is a directory and exists on the file system?()A
Boolean exists=Directory.exists (“prefs”);B
Boolean exists=(new File(“prefs”)).isDir();C
Boolean exists=(new Directory(“prefs”)).exists();D
Boolean exists=(new File(“prefs”相关问题