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Topic: java io 方法的选择。(FileWriter和 BufferedWriter)

1.java io 方法的选择。(FileWriter和 BufferedWriter)

Posted by: develop8
Posted on: 2006-06-23 07:35

/*因为FileWriter和 BufferedWriter 使用的都是类writer的write方法
所以在这里FileWriter没必要用BufferedWriter来包装，
因为BufferedWriter没有自己更高明的方法，都是使用同样的
父类的方法。不象BufferedReader 类独有ReadLine方法，
所以在这里我没有使用BufferedWriter类，不知道我说的
对不对？？？？请读者评价！！！
*/


import java.io.*;
class binary{
public static void main(String[]args)throws Exception{
String s2="相当长的字符串";
FileWriter w =new FileWriter("d:\\pretty\\basic\\binary.html");
/*
BufferedWriter bw = new BufferedWriter(w);
bw.write(s2);
bw.close();
*/
w.write(s2);
w.close();

}
}

2.Re:java io 方法的选择。(FileWriter和 BufferedWriter) [Re: develop8]	Copy to clipboard
Posted by: lisliefor Posted on: 2006-06-23 09:49 io流这块很大，没有很深的研究，不敢妄下评断。不过，我可以肯定楼主的理解是非常不.......的。

3.Re:java io 方法的选择。(FileWriter和 BufferedWriter) [Re: develop8]

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Posted by: why
Posted on: 2006-06-23 09:52

read the API doc:
http://java.sun.com/j2se/1.4.2/docs/api/java/io/BufferedWriter.html

In general, a Writer sends its output immediately to the underlying character or byte stream. Unless prompt output is required, it is advisable to wrap a BufferedWriter around any Writer whose write() operations may be costly, such as FileWriters and OutputStreamWriters.

4.Re:java io 方法的选择。(FileWriter和 BufferedWriter) [Re: develop8]	Copy to clipboard
Posted by: yuxiangyu Posted on: 2006-06-23 21:31 BufferedString好像有缓冲功能,可以加快速度!

5.Re:java io 方法的选择。(FileWriter和 BufferedWriter) [Re: develop8]	Copy to clipboard
Posted by: QwerXZC Posted on: 2006-06-29 23:17 楼上的，不好意思，应该是java.lang.StringBuffer吧

6.Re:java io 方法的选择。(FileWriter和 BufferedWriter) [Re: develop8]	Copy to clipboard
Posted by: develop8 Posted on: 2006-07-02 06:24 跟 StringBuffer 有什么关系？读写的都是依 string来写的，你说的是StringBuffer sbuf; sbuf=sbuf.append(String) 然后写的时候转化为string 是吗？这样效率要高很多吗？只有在过程里用是吗？

7.Re:java io 方法的选择。(FileWriter和 BufferedWriter) [Re: develop8]	Copy to clipboard
Posted by: why Posted on: 2006-07-02 06:35 跟 StringBuffer 看看api doc 吧, FileWriter "sends its output immediately".