假设 hello. txt 文件的内容是 ABCDEF ,下列哪个是正确的 ? 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. print1n((char)C); } catch(IOException exp){} } }