Text file into Java List using Commons or

Question

What is the most elegant way to put each line of text (from the text file) into LinkedList (as String object) or some other collection, using Commons or Guava libraries.

Answer 1

using org.apache.commons.io.FileUtils

FileUtils.readLines(new File("file.txt"));

Answer 2

They are pretty similar, with Commons IO it will look like this:

List<String> lines = FileUtils.readLines(new File("file.txt"), "UTF-8");

Main advantage of Guava is the specification of the charset (no typos):

 List<String> lines = Files.readLines(new File("file.txt"), Charsets.UTF_8);

Answer 3

I'm not sure if you only want to know how to do this via Guava or Commons IO, but since Java 7 this can be done via java.nio.file.Files.readAllLines(Path path, Charset cs) (javadoc).

List<String> allLines = Files.readAllLines(dir.toPath(), StandardCharsets.UTF_8);

Since this is part of the Java SE it does not require you to add any additional jar files (Guava or Commons) to your project.

Answer 4

Using Apache Commons IO, you can use FileUtils#readLines method. It is as simple as:

List<String> lines = FileUtils.readLines(new File("..."));
for (String line : lines) {
  System.out.println(line);  
}

Answer 5

This is probably what youre looking for

FileUtils.readLines(File file)

Answer 6

Here's how to do it with Guava:

List<String> lines = Files.readLines(new File("myfile.txt"), Charsets.UTF_8);

Reference:

• Files.readLines(File, Charset)