NewInstance & constructor of base class

Question

When I instantiate a sub class directly (using new), the code in the constructor method of both base and sub classes run.
When I instantiate using java.lang.reflect.Constructor.newInstance, only the sub class's constructor method is invoked. Is there a way to force running the constructor method of the base class as well?
Thanks & Regards.

Answer 1

when I tried to build a simple code to show the problem, I realised that the problem is somewhere else - Still not solvable by me - Please help.
Irrespective of whether new or Constructor.newInstance -
The constructor method with appropriate signature is invoked from child class.
The constructor method without any arguments is invoked from parent class. - This is the reason for my original problem.
In the attached code, the variable xyz is not getting assigned proper value (from the argument a).
public class Mainer {
   public static void main(String args[]) throws ClassNotFoundException, NoSuchMethodException, InstantiationException, IllegalAccessException, IllegalArgumentException, java.lang.reflect.InvocationTargetException
       int inArg = 5;
       System.out.println("With new");
       ChldClass chld1 = new ChldClass(inArg);
       chld1.m1();
       System.out.println("With Constructor.newInstance");
       java.lang.reflect.Constructor ArgsConstructor;
       Class[] argsClass = new Class[] {int.class};
       Class chld2Class = Class.forName("ChldClass");
       ArgsConstructor = chld2Class.getConstructor(argsClass);
       Object[] argsObject = new Object[] {5};
       ChldClass chld2 = (ChldClass)ArgsConstructor.newInstance(argsObject);
       chld2.m1();
class PrntClass
    int xyz;
        public PrntClass(int a)
            xyz = a;
            System.out.println("Int Arg Constructor within Parent Class <<<" + xyz + ">>>");
        public PrntClass()
            System.out.println("Default Constructor within Parent Class");
     public void m1()
          System.out.println("M1 of Parent Class");
class ChldClass extends PrntClass
    public ChldClass(int a)
        System.out.println("Int Arg Constructor within Child");
     public void m1()
          System.out.println("Value of xyz "+xyz);
     public void m2()
          System.out.println("M2 of ChldClass");
The result displayed:
With new
Default Constructor within Parent Class
Int Arg Constructor within Child
Value of xyz 0
With Constructor.newInstance
Default Constructor within Parent Class
Int Arg Constructor within Child
Value of xyz 0
Thanks & Regards.