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In the doc it says
Read all lines from a file as a
Stream.
Does that necessary mean that it's loading the entire file? For example:
try (Stream<String> stream = Files.lines(Paths.get("myfilename.txt"))) {
stream.forEach(x -> {
if myfilename is 100GB , will Files.lines load the entire 100GB?
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What does Files. lines(Path path) do? Explanation: Files. lines(Path path) that reads all lines from a file as a Stream.
Further more, Use method Files. readLines() method to get the all the lines in the form of java 8 Stream. Next, use forEach() method to get the each line of file and print into the console. * Java 8 example to read the file using Streams.
Reading Text Files in Java with BufferedReader If you want to read a file line by line, using BufferedReader is a good choice. BufferedReader is efficient in reading large files. The readline() method returns null when the end of the file is reached. Note: Don't forget to close the file when reading is finished.
Well, the link you provided states it already:
Unlike readAllLines, this method does not read all lines into a List, but instead populates lazily as the stream is consumed.
So for every time your for-each block is called, a new line is read.
118
No, it doesn't load the entire file into memory. It internally uses a BufferedReader with the default buffer size, repeatedly calling readLine().
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