Java code to create JAR

JarCreator.java

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Paths;
import java.util.jar.JarEntry;
import java.util.jar.JarOutputStream;
import java.util.logging.Logger;

public class JarCreator {
    private static final Logger LOGGER = Logger.getLogger(JarCreator.class.getName());

    public static void main(String[] args) {
        createJar("D:/files/source", "D:/files/dest", "myjar");
    }

    public static boolean createJar(String source, String destination, String filename) {
        final String extension = ".jar";
        final String fileName = filename + extension;
        final String absolutePath = Paths.get(destination).resolve(fileName).toFile().getAbsolutePath();

        try (JarOutputStream jos = new JarOutputStream(new FileOutputStream(absolutePath))) {
            File sourceDir = new File(source);
            if (sourceDir.isDirectory()) {
                int length = 0;
                byte[] buffer = new byte[1024];
                for (File sourceFile : sourceDir.listFiles()) {
                    JarEntry entry = new JarEntry(sourceFile.getName());
                    entry.setTime(sourceFile.lastModified());
                    jos.putNextEntry(entry);
                    InputStream is = new BufferedInputStream(new FileInputStream(sourceFile));
                    while ((length = is.read(buffer, 0, buffer.length)) != -1) {
                        jos.write(buffer, 0, length);
                    }
                    is.close();
                }
            }

            return true;
        } catch (IOException exception) {
            LOGGER.severe(() -> "Failed to create JAR");
        }

        return false;
    }
}