java中講講DataInputStream的用法

DataInputStream的用法
馬克-to-win：DataInputStream顧名思義：就是專門用來(lái)讀各種各樣的數(shù)據(jù)的，比如 （int，char，long等），一定要注意 DataOutputStream 與DataInputStream配合使用，而且二者讀寫的順序要一樣，可以參照下面的例子。馬克- to-win：馬克 java社區(qū)：防盜版實(shí)名手機(jī)尾號(hào)： 73203。



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("我們");
        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. */
        System.out.println(dis.readInt());
        System.out.println(dis.readDouble());
        System.out.println(dis.readUTF());
        dis.close();

    }
}
結(jié)果是：
345
4.54
我們