DataOutputStream 类与BufferedOutputStream类的区别是什么

DataOutputStream 类与BufferedOutputStream类的区别是什么

DataOutputStream dataout=new DataOutputStream(new

FileOutputStream("file"));
BufferedOutputStream dataout1=new BufferedOutputStream(new

FileOutputStream("file"));

DataOutputStream 类与BufferedOutputStream类的区别是什么:
BufferedOutputStream类能够在内存里建立一个缓冲区,当写文件的时候,能起到

缓冲的作用.但是DataOutputStream能像BufferedOutputStream类一样起到缓冲作

用吗?如果有缓冲作用的话,但是DataOutputStream 类的构造函数里,只有一个.而

且其构造函数的参数没有提供出设置缓存大小的参数?


共同点是, 两个类都是java.io.FilterOutputStream的子类, 但是两个类的用途不一样:

DataOutputStream

A data output stream lets an application write primitive Java data types to an output stream in a portable way. An application can then use a data input stream to read the data back in.

所以这个类的方法大多是writeFloat, writeDouble, writeBoolean等等, 与DataInputStream一起使用可以把java的primitive 数据写入读出.

BufferedOutputStream
The class implements a buffered output stream. By setting up such an output stream, an application can write bytes to the underlying output stream without necessarily causing a call to the underlying system for each byte written.

BufferedOutputStream有缓存读写的功能, 而DataOutputStream没有