Foo.java

import java.lang.reflect.Constructor;
import java.util.Arrays;
import java.util.List;

public final class Foo {
  public static void main(String[] args) {
    final Constructor<?>[] ctors = A.class.getDeclaredConstructors();
    for(Constructor<?> ctor : ctors) {
      System.out.println(Arrays.toString(ctor.getParameterTypes()));
      System.out.println(Arrays.toString(ctor.getGenericParameterTypes()));
      System.out.println();
    }
  }

  private class A {
    A(String a) {}
    A(List<String> a) {}
  }
}

[class Foo, class java.lang.String]
[class Foo, class java.lang.String]

[class Foo, interface java.util.List]
[java.util.List<java.lang.String>] //wait, where is Foo?