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BufferedReader

2 replies on 1 page. Most recent reply: Mar 10, 2005 3:53 AM by Dimitris Paras

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Dimitris Paras

Posts: 12
Nickname: dimpars
Registered: Feb, 2005

BufferedReader Posted: Mar 8, 2005 7:07 AM
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I would like to ask what is the difference between
BufferedReader and FileReader classes. For example what is the contribution of each class in the following statement:

BufferedReader in = new BufferedReader(new FileReader(" path of a file"));

thx a lot!!!


Matthias Neumair

Posts: 660
Nickname: neumi
Registered: Sep, 2003

Re: BufferedReader Posted: Mar 8, 2005 10:15 AM
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FileReader is a InputStreamreader:
Quote:
An InputStreamReader is a bridge from byte streams to character streams: It reads bytes and decodes them into characters using a specified charset. The charset that it uses may be specified by name or may be given explicitly, or the platform's default charset may be accepted.
Each invocation of one of an InputStreamReader's read() methods may cause one or more bytes to be read from the underlying byte-input stream. To enable the efficient conversion of bytes to characters, more bytes may be read ahead from the underlying stream than are necessary to satisfy the current read operation.

BufferedReader:
Read text from a character-input stream, buffering characters so as to provide for the efficient reading of characters, arrays, and lines.
In general, each read request made of a Reader causes a corresponding read request to be made of the underlying character or byte stream. It is therefore advisable to wrap a BufferedReader around any Reader whose read() operations may be costly, such as FileReaders and InputStreamReaders.


I could not explain it better.
That's what the API is for.

Dimitris Paras

Posts: 12
Nickname: dimpars
Registered: Feb, 2005

Re: BufferedReader Posted: Mar 10, 2005 3:53 AM
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thank you very much!i got the meaning!cheers

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