bufferedreader

I have three questions. To explain, I was reviewing someone's code, and noticed BufferedReader s sometimes aren't being closed. Usually, Eclipse gives a warning that this is a potential memory leak (and I fix it). However, within a Callable inner class, there is no warning. class outerClass { ... public void someMethod() { Future<Integer> future = outputThreadPool.submit(new innerClass(this.myProcess.getInputStream(), threadName)); ... } class innerClass implements Callable<Integer> { private final InputStream stream; private final String prepend; innerClass(InputStream stream, String prepend)

I'm trying to read a tab separated text file line per line. The lines are separated by using carriage return ("\r\n") and LineFeed (\"n") is allowed within in tab separated text fields. Since I want to read the File Line per Line, I want my programm to ignore a standalone "\n". Unfortunately, BufferedReader uses both possibilities to separate the lines. How can I modify my code, in order to ignore the standalone "\n"? try { BufferedReader in = new BufferedReader(new FileReader(flatFile)); String line = null; while ((line = in.readLine()) != null) { String cells[] = line.split("\t"); System.out

I am aware of the specific function in golang from the bufio package. func (b *Reader) Peek(n int) ([]byte, error) Peek returns the next n bytes without advancing the reader . The bytes stop being valid at the next read call. If Peek returns fewer than n bytes, it also returns an error explaining why the read is short. The error is ErrBufferFull if n is larger than b's buffer size. I need to be able to read a specific number of bytes from a Reader that will advance the reader . Basically, identical to the function above, but it advances the reader. Does anybody know how to accomplish this?

How can I read all of a BufferedReader 's lines and store into a String? val br = new BufferedReader(...) val str: String = getAllLines(br) // getAllLines() -- is where I need help Similar to this question . This is how I deal with a BufferedReader in Scala: val br:BufferedReader = ??? val strs = Stream.continually(br.readLine()).takeWhile(_ != null) You will have a string for each line from the reader. If you want it in one single string: val str = Stream.continually(br.readLine()).takeWhile(_ != null).mkString("\n") 来源： https://stackoverflow.com/questions/18923864/read-all-lines-of

This question already has an answer here: Scanner vs. BufferedReader 12 answers Can anyone explain me the difference between the class BufferedReader , FileReader and Scanner ? and which one to use when I want to read a text file? Well: FileReader is just a Reader which reads a file, using the platform-default encoding (urgh) BufferedReader is a wrapper around another Reader , adding buffering and the ability to read a line at a time Scanner reads from a variety of different sources, but is typically used for interactive input. Personally I find the API of Scanner to be pretty painful and