问题详情

下列代码实现从文件file.dat中读出第5个字节到变量c中，横线处应该填入下列项中的______。 import java.io.*; public class exl5 { public static void main(String[] args) { try System.out.println((char)c); catch(Exception e) { e.printStackTrace(); } } }
A．FileInputStream in = new FileInputStream("chl/file.dat"); in.skip(4); int c = in.read();
B．FileInputStream in = new FileInputStream("chl/file.dat"); in.skip(5); int c = in.read();
C．Fi2eInputStream in = new FileInputStream("file.dat"); int c = in.read();
D．RandomAccessFile in = new RandomAccessFile ("chi/file. dat "); in.skip (4); int c = in.readByte();请帮忙给出正确答案和分析，谢谢！