import?java.io.File;
import?java.io.FileInputStream;
import?java.io.IOException;
public?class?Demo?{
????public?static?void?main(String[]?args)?throws?IOException{
????????Demo?demo?=?new?Demo();
	demo.go("E:\\testdata\\directory1\\text1.txt");
????}
????public?void?go?(String?fn)?throws?IOException{
????????if(!?(new?File(fn)).exists())?{
????????????IOException?ioe?=?new?IOException("文件不存在");
	????throw?(ioe);
????????}else?{
	????FileInputStream?fis?=?new?FileInputStream(fn);
	????fis.read();
????	????int?aa;
	????int?bb?=?1;
	????while((aa?=?fis.read())?!=?-1)?{
		if((bb++?%?10)?==?0)?{
		????System.out.println();
		}
		if(aa?<=?0xF)?{
		????System.out.print(0);
	????????}
	????????System.out.print(Integer.toHexString(aa)?+?",");
	????}
	????fis.close();
????????}
????}
}

代碼是這樣寫的，文件text1.txt中的內(nèi)容是：There is a very beautiful city called Loulan,which locates in the west of ancient China.，輸出結(jié)果卻是：

68,65,72,65,20,69,73,20,61,

20,76,65,72,79,20,62,65,61,75,

74,69,66,75,6c,20,63,69,74,79,

20,63,61,6c,6c,65,64,20,4c,6f,

75,6c,61,6e,2c,77,68,69,63,68,

20,6c,6f,63,61,74,65,73,20,69,

6e,20,74,68,65,20,77,65,73,74,

20,6f,66,20,61,6e,63,69,65,6e,

74,20,43,68,69,6e,61,2e,

為何第一行提前了一下？