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Dec 31st, 2008

Inheritance

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Hello,
Please tell me in Java we don't have a multiple inheritance? so,in which function we use these inheritance.

Thanks

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Simran1

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Dec 31st, 2008

Re: Inheritance

Click to Expand / Collapse Quote originally posted by Simran1 ...

Hello,
Please tell me in Java we don't have a multiple inheritance? so,in which function we use these inheritance.

Thanks

You say:
> we don't have a multiple inheritance
but then you ask:>in which function we use these inheritance

The only thing I can say is that java doesn't have multiple class inheritance, but multiple Interface implementation.

If that doesn't cover you, ask a better question

javaAddict

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Dec 31st, 2008

Re: Inheritance

What do you mean?

There isn't multiple inheritance in Java. It's a single inheritance only language.

chili5

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Dec 31st, 2008

Re: Inheritance

Click to Expand / Collapse Quote originally posted by chili5 ...

What do you mean?

There isn't multiple inheritance in Java. It's a single inheritance only language.

That's what javaAddict said, Java does not have multiple class inheritance, you can only only extend (is-A) one class. However you can implement (has-A) any amount of interfaces you want.

Last edited by jasimp; Dec 31st, 2008 at 7:41 pm.

jasimp

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Jan 1st, 2009

Re: Inheritance

Click to Expand / Collapse Quote originally posted by Simran1 ...

Hello,
Please tell me in Java we don't have a multiple inheritance? so,in which function we use these inheritance.

Thanks

c there is no concept of multiple inheritance in java but some time it seems that there may be a multiple inheritence....

vijendtra

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Re: Inheritance

Click to Expand / Collapse Quote originally posted by jasimp ...

That's what javaAddict said, Java does not have multiple class inheritance, you can only only extend (is-A) one class. However you can implement (has-A) any amount of interfaces you want.

Hi Sriran1 ,

what jasimp said is correct expect that implementing a interface is *NOT* mean "Has-A" relationship.

Has-A relationship is what when an Class has other Class's object in it's attribute

Implementing a interface is also means "Is-A" relationship

e.g

Java Syntax (Toggle Plain Text)
//for Is-A 
class Mammal {
}
 
class Dog extends Mammal { }
 
//for Has-A 
 
class Tail { }
 
class Dog extends Mammal { // Dog IS-A mammal
  Tail tail ;     //  and Has-A Tail
 }
//for Is-A 
class Mammal {
}

class Dog extends Mammal { }

//for Has-A 

class Tail { }

class Dog extends Mammal { // Dog IS-A mammal
  Tail tail ;     //  and Has-A Tail
 }

parthiban

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