So we will see which are all these rules :
Rule 1 : The signature of method in the child class should be exactly same as that in Parent class which includes return type, method parameters and name.
Rule 2: Argument list should be exactly same as that of overridden method.
Rule 3: Constructors cannot be overridden .
Rule 4: Static methods cannot be overridden but can be re declared which is actually method hiding .
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Method Overloading : Overloading in java occurs when methods in a same class or in child classes shares a same name with a ‘difference in number of arguments’ or ‘difference in argument type’ or both.
Argument list could differ in –
Number of parameters
Data type of parameters
Sequence of data type of parameters
You can read in details with example about Method Overloading here.
Method Overloading
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Method Overriding
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Signature of method in the child class differs as that in Parent class
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Signature of method in the child class should be exactly same as that in Parent class
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Argument list could differ in –
Number of parameters
Data type of parameters
Sequence of data type of parameters
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Argument list should be exactly same as that of overridden method.
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Method overloading a single class is it means both of the method are written in the same clas
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Method overriding we have two classes one is parent other is child .Child class Indane contain the overridden method and it need to extend the parent class .
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Method overloading is compile time polymorphism.In method overloading if there is an issue with the method signature it is shown in the eclipse as soon as you write the code
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Method overriding is runtime polymorphism
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Java Method Overloading example
class javaInHouseOverloadingExample
{
void int add(int a,int b)
{
return a+b;
}
void int add(int a,int b,int c)
{
return a+b+c;
}
}
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Java Method Overriding example
class Parent
{
void eat()
{
System.out.println("Parent...");
}
}
class Child extends Parent
{
void eat()
{
System.out.println("Child..");
}
}
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