Overloading-->method with different signature
Overriding -->method with same signature

overloading:
method overloading means method name is same and different 
parameter ie different signature.. and overloading method 
are present in same class
for eg ,
       let us consider show() is a method
           1.show(int a)
            2.show(int a,int b)
overriding:
        method overriding means method name is same and 
parameter also same. these are present in different levels 
of class
for eg,
           let us consider show() is a method
           1.show(int a)
           2.show(int a)