java中讲讲DataInputStream的用法，举例？

2.4 DataInputStream的用法 
马 克-to-win：DataInputStream顾名思义：就是专门用来读各种各样的数据的，比如（int，char，long等），一定要注意 DataOutputStream 与DataInputStream配合使用，而且二者读写的顺序要一样，可以参照下面的例子。

例：2.4.1

import java.io.*;
public class TestMark_to_win {
    /* when run this program, no need any data.dat file, because it can generate
the file.anyway,this file can not be recognized by humanbeing
*/
    public static void main(String[] args) throws IOException {
        FileOutputStream fos = new FileOutputStream("c:/data.txt");

        DataOutputStream dos = new DataOutputStream(fos);

        dos.writeInt(345);

        dos.writeDouble(4.54);

        dos.writeUTF("我们");
        dos.close();

        FileInputStream fis = new FileInputStream("c:/data.txt");
        DataInputStream dis = new DataInputStream(fis);
        /*1) a data output stream to write data that can later
be read by a data input stream. 2)note the sequence.first write what,
then read what. if you comment out the following statment,the result
is not correct, because the sequence is chaotic.I tried. 3) readInt()
Returns: the next four bytes of this input stream, interpreted as an
int. */

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