IO流(操作基本数据类型的流对象DataStream)

package com.yyq;
import java.io.*;
/*
 * DataInputStream 和 DataOutputStream
 * 专门操作数据的（基本数据类型）
 * 为什么数据显示不清楚，因为记事本显示的是字符
 */
public class DataStreamDemo {

    public static void main(String[] args) throws IOException {
        // TODO Auto-generated method stub
        //writeData();
        //readData();
        writeUTF();
    }
    public static void readData() throws IOException{
        DataInputStream dis = new DataInputStream(new FileInputStream("data.txt"));
        System.out.println(dis.readInt());
        System.out.println(dis.readBoolean());
    }
    public static void writeUTF() throws IOException{
        DataOutputStream dos = new DataOutputStream(new FileOutputStream("utfdata.txt"));
        dos.writeUTF("你好");
        dos.flush();
        dos.close();
    }
    public static void writeData() throws IOException{
        DataOutputStream dos = new DataOutputStream(new FileOutputStream("data.txt"));
        dos.writeInt(234);
        dos.writeBoolean(true);
        dos.writeDouble(123.123);
        dos.close();
    }

}