centos 为实现文件file只读,且无法删除,可利用__________命令修改文件的隐藏属性来实现 A: chmod 400 file B: chattr +i file C: chattr +a file D: chown +i file
centos 为实现文件file只读,且无法删除,可利用__________命令修改文件的隐藏属性来实现 A: chmod 400 file B: chattr +i file C: chattr +a file D: chown +i file
以下是CentOS Linux支持的硬盘接口有( ) A: IDE B: ISCSI C: COM D: PS/2
以下是CentOS Linux支持的硬盘接口有( ) A: IDE B: ISCSI C: COM D: PS/2
如何定义一个文件读写变量? A: FILE *file; B: FILE file; C: FILE &file; D: file *file;
如何定义一个文件读写变量? A: FILE *file; B: FILE file; C: FILE &file; D: file *file;
创建一个d盘aa文件夹下news.txt文件对象,以下正确的是 A: File file = new File("d:/aa"); B: File file = new File("d:/aa/news.txt"); C: File file = new File("d:/news.txt"); D: File file = new File("d:\aa\news.txt");
创建一个d盘aa文件夹下news.txt文件对象,以下正确的是 A: File file = new File("d:/aa"); B: File file = new File("d:/aa/news.txt"); C: File file = new File("d:/news.txt"); D: File file = new File("d:\aa\news.txt");
下列__________说法是正确的?I:File file = new File("input.txt");try (Scanner input = new Scanner(file)) { String line = input.nextLine();}II:try (File file = new File("input.txt"); Scanner input = new Scanner(file);) { String line = input.nextLine();}III:File file;try (file = new File("input.txt"); Scanner input = new Scanner(file);) { String line = input.nextLine();}IV:File file;Scanner input;try (file = new File("input.txt"); input = new Scanner(file);) { String line = input.nextLine();} A: I B: II C: III D: IV
下列__________说法是正确的?I:File file = new File("input.txt");try (Scanner input = new Scanner(file)) { String line = input.nextLine();}II:try (File file = new File("input.txt"); Scanner input = new Scanner(file);) { String line = input.nextLine();}III:File file;try (file = new File("input.txt"); Scanner input = new Scanner(file);) { String line = input.nextLine();}IV:File file;Scanner input;try (file = new File("input.txt"); input = new Scanner(file);) { String line = input.nextLine();} A: I B: II C: III D: IV
使用File file=new File("c:myletter
使用File file=new File("c:myletter
创建文件file的命令是()。 A: mv file B: mkdir file C: rm file D: cp file
创建文件file的命令是()。 A: mv file B: mkdir file C: rm file D: cp file
3.1 下面是创建File对象的语句,错误的是( ) A: File f=new File("d:\\text.txt"); B: File f=new File("d: "); C: File f=new File("d:","text.txt"); D: File f=new File("d:\text.txt");
3.1 下面是创建File对象的语句,错误的是( ) A: File f=new File("d:\\text.txt"); B: File f=new File("d: "); C: File f=new File("d:","text.txt"); D: File f=new File("d:\text.txt");
Com in COM Port means ______________.
Com in COM Port means ______________.
下面不属于File类构造方法的是()。 A: File(String filename) B: File(String directoryPath,String filename) C: File(File f, String filename) D: File( )
下面不属于File类构造方法的是()。 A: File(String filename) B: File(String directoryPath,String filename) C: File(File f, String filename) D: File( )