Java Inheritance - calling superclass method

Question

Lets suppose I have the following two classes  public class alpha        public alpha              some logic            public void alphaMethod1              some logic          public class beta extends alpha        public beta              some logic            public void alphaMethod1              some logic          public class Test extends beta        public static void main String   args                  beta obj   new beta            obj alphaMethod1      Here I want to call the method from class alpha               If I initiate a new object of type beta  how can I execute the alphamethod1 logic found in class alpha rather than beta  Can I just use super   alphaMethod1    lt - I wonder if this is possible   Autotype in Eclipse IDE is giving me the option to select alphamethod1 either from class alpha or class beta

User · Answer

Whenever you create child class object then that object has all the features of parent class. Here Super() is the facilty for accession parent.

If you write super() at that time parents's default constructor is called. same if you write super.

this keyword refers the current object same as super key word facilty for accessing parents.

User · Answer

You can do   super alphaMethod1      Note  that super is a reference to the parent  but super   is it s constructor

User · Answer

You can t call alpha s alphaMethod1   by using beta s object But you have two solutions   solution 1  call alpha s alphaMethod1   from beta s alphaMethod1     class Beta extends Alpha     public void alphaMethod1           super alphaMethod1            or from any other method of Beta like   class Beta extends Alpha     public void foo            super alphaMethod1           class Test extends Beta       public static void main String   args             Beta beta   new Beta          beta foo             solution 2  create alpha s object and call alpha s alphaMethod1    class Test extends Beta      public static void main String   args             Alpha alpha   new Alpha          alpha alphaMethod1

User · Answer

Simply use   super alphaMethod1     See super keyword in java

User · Answer

It is possible to use super to call the method from mother class  but this would mean you probably have a design problem  Maybe B alphaMethod1   shouldn t override A s method and be called B betaMethod1     If it depends on the situation  you can put some code logic like    public void alphaMethod1        if  something            super alphaMethod1            return               Rest of the code for other situations     Like this it will only call A s method when needed and will remain invisible for the class user

[java] Java Inheritance - calling superclass method

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