假设 hello.txt 文件的内容是: ABCDEF , 下列选项正确的是 ( ) import java.io.*; public class E { public static void main(String args[]){ File file = new File("hello.txt"); try { FileInputStream in = new FileInputStream(file); int c = in.read(); c = in.read(); System.out.println((char)c); } catch(IOException exp){} } }