CODEWITHSUNDEEP
javafilelinenio
Rafael Orágio
Rafael Orágio

Reputation: 1788

Read line using Java New I/O

What's the best way to read a line from a file using the New I/O ?

I can only get a byte at a time.

Any idea?

Upvotes: 3

Views: 5114

Answers (3)

damon
damon

Reputation: 41

Or for small files you can do this:

List<String> smallFilesLines =  Files.readAllLines(  
FileSystems.getDefault().getPath("smallFile.txt"), StandardCharsets.UTF_8);  

for (String oneLine : smallFilesLines) {
   System.out.println(oneLine); 
}

Upvotes: 4

Peter Lawrey
Peter Lawrey

Reputation: 533492

Are you referring to the NIO introduced in Java 5.0, 7 years ago? Or the Asynchronous NIO adding in Java 7?

In short the simple answer is that using BufferedReader is much, much simpler and not much slower.

If you must use ByteBuffer, or you want that last bit of performance, you have to read one byte at a time. (And you have handle the situation that only part of the line has been read so you can run out of data in the ByteBuffer before you reach the new line)

Upvotes: 2

LordDoskias
LordDoskias

Reputation: 3191

BufferedReader's readline() method should be enough. Otherwise you have to read an arbitrary number of bytes and parse for the endline '\n' or \r\n' if it is in windows style line ending

Upvotes: 2

Related Questions