Finding out where your classfile resides.

ClassTest.java

public class ClassTest {

  @Test
  public void testClassResource() {
    URL resource = getClass().getResource("/org/testng/annotations/Test.class");
    assertThat(resource).isNotNull();
    assertThat(resource.toString()).endsWith("/org/testng/testng/6.13.1/testng-6.13.1.jar!/org/testng/annotations/Test.class");
  }

  @Test
  public void testClassloaderResource() {
    URL resource = getClass().getClassLoader().getResource("org/testng/annotations/Test.class");
    assertThat(resource).isNotNull();
    assertThat(resource.toString()).endsWith("/org/testng/testng/6.13.1/testng-6.13.1.jar!/org/testng/annotations/Test.class");
  }
}