DataInputStream(InputStream in)

 DataOutputStream(OutputStream out) 

 package cn.itcast_01;

 import java.io.DataInputStream;

 import java.io.DataOutputStream;

 import java.io.FileInputStream;

 import java.io.FileOutputStream;

 import java.io.IOException;

 /*

  * 可以读写基本数据类型的数据

  * 数据输入流：DataInputStream

  *             DataInputStream(InputStream in)

  * 数据输出流：DataOutputStream

  *             DataOutputStream(OutputStream out)

  */

 public class DataStreamDemo {

     public static void main(String[] args) throws IOException {

         // 写

         // write();

         // 读

         read();

     }

     private static void read() throws IOException {

         // DataInputStream(InputStream in)

         // 创建数据输入流对象

         DataInputStream dis = new DataInputStream(

                 new FileInputStream("dos.txt"));

         // 读数据

         byte b = dis.readByte();

         short s = dis.readShort();

         int i = dis.readInt();

         long l = dis.readLong();

         float f = dis.readFloat();

         double d = dis.readDouble();

         char c = dis.readChar();

         boolean bb = dis.readBoolean();

         // 释放资源

         dis.close();

         System.out.println(b);

         System.out.println(s);

         System.out.println(i);

         System.out.println(l);

         System.out.println(f);

         System.out.println(d);

         System.out.println(c);

         System.out.println(bb);

     }

     private static void write() throws IOException {

         // DataOutputStream(OutputStream out)

         // 创建数据输出流对象

         DataOutputStream dos = new DataOutputStream(new FileOutputStream(

                 "dos.txt"));

         // 写数据了

         dos.writeByte(10);

         dos.writeShort(100);

         dos.writeInt(1000);

         dos.writeLong(10000);

         dos.writeFloat(12.34F);

         dos.writeDouble(12.56);

         dos.writeChar('a');

         dos.writeBoolean(true);

         // 释放资源

         dos.close();

     }

 }