Find where java class is loaded from

package foo;

public class Test
{
    public static void main(String[] args)
    {
        ClassLoader loader = Test.class.getClassLoader();
        System.out.println(loader.getResource("foo/Test.class"));
    }
}

file:/C:/Users/Jon/Test/foo/Test.class

public static void String getClassResource(Class klass) {
  return klass.getClassLoader().getResource(
     klass.getName().replace('.', '/') + ".class").toString();
}

getClass().getProtectionDomain().getCodeSource().getLocation();

MyClass.class.getClassLoader();