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Java IO & NIO - Files.lines() Examples

Java IO & NIO Java Java API 

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Class:

java.nio.file.Files

java.lang.Objectjava.lang.Objectjava.nio.file.Filesjava.nio.file.FilesLogicBig

Methods:

public static Stream<String> lines(Path path)
                            throws IOException


public static Stream<String> lines(Path path,
                                   Charset cs)
                            throws IOException

Read all lines from a file as a Stream.

Parameters:
path - the path to the file
cs - the charset to use for decoding
Returns:
the lines from the file as a Stream



Examples


package com.logicbig.example.files;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.stream.Stream;

public class LinesExample {

    public static void main(String... args) throws IOException {
        Path path = getFilePathToRead();
        Stream<String> lines = Files.lines(path);
        lines.forEach(System.out::println);
    }

    public static Path getFilePathToRead() throws IOException {
        Path tempFile = Files.createTempFile("test-file", ".txt");
        Files.write(tempFile, "line1\nline2\n".getBytes());
        return tempFile;
    }
}

Output

line1
line2




package com.logicbig.example.files;

import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.Arrays;
import java.util.stream.Stream;

public class LinesExample2 {

    public static void main(String... args) throws Exception {
        Path path = getFilePathToRead();
        Stream<String> lines = Files.lines(path, Charset.forName("UTF-16"));
        lines.forEach(System.out::println);
    }

    public static Path getFilePathToRead() throws IOException {
        Path tempFile = Files.createTempFile("test-file", ".txt");
        Iterable iterable = Arrays.asList("line1", "line2");
        Files.write(tempFile, iterable, Charset.forName("UTF-16"));
        return tempFile;
    }
}

Output

line1
line2

See Also