单项选择题
(读写文件)下列程序完成了读取指定文件内容的功能,在下划线处应填入的代码是______。import java.io.*; public class test { public static String read (String FileName) throws Exception{ BufferedReader in = new BufferedReader(new FileReader(FileName)); String s = null; StringBuilder sb = new StringBuilder(); While((s=_____.readLine()) != null){ sb.append(s + “/n”); } _______.close(); return sb.toString(); } public static void main (String [] args) throws Exception{ System.out.println(read(“d://book.txt”)); } }
A、out, in
B、in, out
C、out, out
D、in, in
A.io.*;
B.readLine())
C.append(s
D.close();
E.toString();
F.out.println(read(“d://book.txt”));