6. Sort Lines

package DPM;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) throws IOException {
        String inputPath = "D:\\Coding\\Java\\Softuni\\Java Advanced - January 2019" +
                "\\04. Java-Advanced-Fiels-and-Directories-Lab\\04. Java-Advanced-" +
                "Files-and-Streams-Lab-Resources\\input.txt";
        String outputPath = "D:\\Coding\\Java\\Softuni\\Java Advanced - January 2019" +
                "\\04. Java-Advanced-Fiels-and-Directories-Lab\\04. Java-Advanced-" +
                "Files-and-Streams-Lab-Resources\\output.txt";

        Path path = Paths.get(inputPath);
        Path output = Paths.get(outputPath);
        List<String> lines = Files.readAllLines(path);
        lines = lines.stream().filter(l ->
                !l.isBlank()).collect(Collectors.toList());
        Collections.sort(lines);
        Files.write(output, lines);
    }
}