Difference between over loading and over ridding?
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Answer Posted / manish kushwaha
Hi All,
These two are very powerful concept in Java. I would like
to explain in veru simple way hope we will get it easily
1) Method OverLoading...
Always this concept comes with Same Name of methods
1) Mthod name should be same
2) Return type can be differ of methods
3) Most Important Condition is
a) Type of Parameter in methods
b) Number of paramenter in methods
c) Order of parameter in methods
Exp. 1 public void foo(String str a, int b){}
2 public int foo(int a, int b, int c){ }
3 public void foo(int a , double b){}
4 public void foo(double b , int a){}
5 public int foo(int a, int b, int c, int
d){ }
Like in above example one method can have any TYPE
of PARAMETER, 2,5 example of NUMBER of PARAMETER, 3,4
example of ORDER of parameter.
**Make sure that method overriding can be done in
same class and Sub/Super class both
2) Method Overriding.
Always method over riding happens only in Sub/Super
class concept
We have one method in super class and same method
in sub class with
1) Same mthod name
2) same method return type
3) same type of parameter
if above condition match then you can say this is
method over ring.....
Exp. Class A{
public int foo(int a, int b){}
}
Class B extends A{
public int foo(int d, int e){}
}
obove scenario is method over riding.
* Always Method overloading happens in Compile time
* Always method over riding happens in Run time.
Hope you got the concept.....
Thanks Manish
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