Re: BufferedReader.readLine() blocks unexpected

From:
Lew <lew@lewscanon.com>
Newsgroups:
comp.lang.java.programmer
Date:
Thu, 11 Oct 2007 17:20:44 -0400
Message-ID:
<xcadneZKdoQwDpPanZ2dnUVZ_h6vnZ2d@comcast.com>
roele said:

According to JavaDoc
i [sic] cant find anything about readLine() blocking.


You sometimes have to dig through the Javadocs to get to the answer.

<http://java.sun.com/javase/6/docs/api/java/io/BufferedReader.html>

In general, each read request made of a Reader causes a corresponding read request to be made of the underlying character or byte stream.


OK, what does the underlying Reader's read() do? For that matter,
BufferedReader extends Reader:

<http://java.sun.com/javase/6/docs/api/java/io/Reader.html>
<http://java.sun.com/javase/6/docs/api/java/io/Reader.html#read()>
and related methods:

This method will block until a character is available, an I/O error occurs, or the end of the stream is reached.


<http://java.sun.com/javase/6/docs/api/java/io/Reader.html#read(char[])>

This method will block until some input is available, an I/O error occurs, or the end of the stream is reached.


<http://java.sun.com/javase/6/docs/api/java/io/Reader.html#read(char[],%20int,%20int)>

This method will block until some input is available, an I/O error occurs, or the end of the stream is reached.


QED.

You have to think through - if it says it's wrapping another method, then the
behavior of the wrapped method is relevant.

--
Lew

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