下列ABCD注释标注的哪行代码有错误？File file=new File("hello.txt"); //AFileReader in= new FileReader(file); //Btry{FileWriter out=new FileWriter(File); //Cout.write("a");//D}catch(Exception e){}
A: A行错
B: B行错
C: C行错
D: D行错
A: A行错
B: B行错
C: C行错
D: D行错
举一反三
- 下列ABCD注释标注的哪行代码有错误? A: A行错 B: B行错 C: C行错 D: D行错
- 下列写法错误的是 A: File f = new File ("a.txt"); B: File f = new File ("d:\\a.txt"); C: FileInputStream fis = new FileInputStream (new File ("a.txt")); D: FileOutputStream fos = new FileOutputStream ( 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");
- 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