Another aspect of buffering concerns text output to a terminal window. By default, System.out (a PrintStream) is line buffered, meaning that the output buffer is flushed when a newline character is encountered. This is important for interactivity, where you'd like to have an input prompt displayed before actually entering any input.
Java.io.BufferedWriter.newLine() Method - The java.io.BufferedWriter.newLine() method write separator to the buffered writer stream. GNU/Linux standard I/O functions (stdio et. al) provide an efficient way to dealing with data streams. By default, they provide a line-buffered behavior. Most of the time, this is not important, but it may be sometime needed to have no bufferring at all. This can be useful when immediate handling of keypresses is needed. Reads text from a character-input stream, buffering characters so as to provide for the efficient reading of characters, arrays, and lines. The buffer size may be specified, or the default size may be used. Oct 24, 2002 · Hello all ! I am reading chapter 5 of Steven's APUE. He mentions that "The standard I/O library does not buffer the characters". But he also gives the standard fputc function as an example of line buffered output. Remarks. Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.
Line buffered. As characters are written to a stream, they are buffered up until the point where a newline character is written. At this point the line of data including the newline character is written to the file referenced by the stream. Similarly for reading, characters are read up to the point where a newline character is found. Unbuffered
The three types of buffering available are unbuffered, block buffered, and line buffered. When an output stream is unbuffered, information appears on the destination file or terminal as soon as written; when it is block buffered many characters are saved up and written as a block; when it is line buffered characters are saved up until a newline is output or input is read from any stream
characters directly to the O/S without undue delay, but doesn't govern what the O/S then chooses to do with them. You'll need to read your O/S' documentation on pipes (which aren't part of C, by the way). In my experience, many "interactive" programs fare rather poorly with pipes; the I/O model really isn't quite what's wanted.
This, again, is done to improve the I/O efficiency. When the underlying file descriptor of a stream is a terminal device, the I/O under Linux will be line buffered. Files, on the other hand, are usually fully buffered (buffered in large blocks). There are three basic modes of buffering to choose from using FILE streams under Linux. These are