Get the path from where a class is loaded : ClassPath « Reflection « Java Tutorial

public class Main {
  public static void main(String[] args) {
    Main csl = new Main();

  private void getCodeSourceLocation() {
    System.out.println("Code source location: "
        + getClass().getProtectionDomain().getCodeSource().getLocation());

7.11.1.Loading a Class That Is Not on the Classpath
7.11.2.Get the path from where a class is loaded
7.11.3.Obtain from where a Class is loaded
7.11.4.Load the class source location from Class.getResource()
7.11.5.Returns a reference to a file with the specified name that is located somewhere on the classpath.