http://www.dropwizard.io/1.3.16/dropwizard-util: Dropwizard is a Java framework for developing ops-friendly, high-performance, RESTful web applications.
  • Coda Hale
  • Nick Telford
  • Graham O'Regan
  • Ryan Kennedy
  • Camille Fournier
  • Carlo Barbara
  • Matt Veitas
  • Ryan Tenney
  • Jochen Schalanda
  • Glenn McAllister
  • Nick Babcock
  • Justin Plock
  • Artem Prigoda 
package io.dropwizard.util;

import java.io.File;
import java.net.URL;
import java.util.Optional;


A class which encapsulates the location on the local filesystem of the JAR in which the current
code is executing.

/**
 * A class which encapsulates the location on the local filesystem of the JAR in which the current
 * code is executing.
 */
public class JarLocation {
    private final Class<?> klass;

    public JarLocation(Class<?> klass) {
        this.klass = klass;
    }

    public Optional<String> getVersion() {
        return Optional.ofNullable(klass.getPackage())
            .map(Package::getImplementationVersion);
    }

    @Override
    public String toString() {
        final URL location = klass.getProtectionDomain().getCodeSource().getLocation();
        try {
            final String jar = new File(location.toURI()).getName();
            if (jar.endsWith(".jar")) {
                return jar;
            }
            return "project.jar";
        } catch (Exception ignored) {
            return "project.jar";
        }
    }
}