10. How the super class is constructed

• The constructor of super class (a base, a parent class) is invoked when object inherits from the parent class.

• When instance of an object is allocated by new keyword, the following steps occur:

  1. Constructor of the Parent is invoked.

  2. If no explicit call to a parent constructor of the super class is provided by the programmer, the default constructor of the super class is invoked automatically.

     
         public class GasGiant extends Planet
         {
             public GasGiant()
             {
                 // Explicit call to a parent constructor:
                 super();
             }
         }
     
     

  3. Each attribute of the object is initialized.

  4. The rest of the constructor code is executed.