在DataOutputStreamDemo這個(gè)類里，查看?dos.writeUTF("中國");是否是writeUTF格式的；

package imooc_File_IO_Demo;

import java.io.DataOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class DataOutputStreamDemo {

?? ?public static void main(String[] args) throws IOException {
?? ??? ?// TODO Auto-generated method stub
?? ??? ?String file="demo/dos.dat";
?? ??? ?DataOutputStream dos =new DataOutputStream(
?? ??? ??? ??? ?new FileOutputStream(file));
?? ??? ?dos.writeInt(10);
?? ??? ?dos.writeInt(-10);
?? ??? ?dos.writeLong(10l);
?? ??? ?dos.writeDouble(3.1415);
?? ??? ?//使用utf-8編碼方法寫出
?? ??? ?dos.writeUTF("中國");
?? ??? ?dos.close();
?? ??? ?IOUtil.printHex("demo/dos.dat");
?? ?}

}