Method Overloading, Static & Instance



Method overloading

                                                                                                             Jvm Compiler

class hirun {                                                                                           compile programme;            
                                                                          
void hirun (){                                                                                          
                                                                                                                   hirun - 3 method 
}                                                                                                                 hirun ();

void hirun (int x){                                                                                  hirun (int x) {}
}                                                                                                                 argument int  
                                                                                                            
hirun (8);
void hirun (int y, String z){                                                                  hirun (int y, String z) {}
}                                                                                                                 argument int, String
hirun (7, "abc");
}

  •        The parts highlighted with the same colour with the code and the Jvm compiler are connected each other.

  •       When we are creating methods again and again in a same class we can use method    overloading concept.

  •        We can over load methods using Parameters. Its called as the "Parameter Signature".
                          Parameter Signature = (changing parameters and identifying)

  •        Creating methods using Parameter Signature in the same class with the same name is called method overloading.

Static & Instance (non-static)


             String a = "hirun";
             void hirun(){
             }

  • Orange coloured method is an Instance method (non-static)

            Static int b = 5;
            static void b = hirun() {
            }
  • Red coloured method is a Static method.

  • Static is a keyword, methods and variables made by the static keyword is known as static variables and methods.  Variables and methods without the keyword static are called, non- static (instance) variables and methods.

  • We can access Static things without an object inside the class.
 
         void hirun (){
         }
         int hirun (){
         }
         void hirun (int y, int z){
         }

  •  If the return type differs, Method name and parameters are equal. Method Overloading won't occur. (It is compulsory to change the parameter sign as a law.)
-(4th Article)        
                                                                                                    


Thank You!
                                                                                                           


                                                                                                            
                     
                                                                                                       -Article about Java by Hirun Yapa



 

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