Can a class be subclass of more than one class?

Question

While i was working on my assignment on Java, I created 3 classes, lets say class 1, class2 and class3

Then I tried to define one of the classes in the following way:

public class class1 extends class2 extends class3{

To be honest, I was almost sure it would not work and in fact did not.

So I wanted to know If I could create a single subclass for two different super classes. Thank You!

No, you can't. And if you search the wide web, you'll find plenty of explanations. Please Google before you ask simple questions. — Kayaman, Apr 11 '14 at 15:31
That is not possible, but there are "work-arounds". http://stackoverflow.com/questions/15132528/class-extending-more-than-one-class-java — Tricky12, Apr 11 '14 at 15:31

score 3 · Answer 1 · answered Apr 11 '14 at 15:31

3

What you are asking for is multiple inheritance. Java does not support this.

Multiple inheritance is hard for compiler writers to implement - mainly because of the diamond problem.

Except - in Java 8 there are interfaces with default methods. This allows sort of a light-weight version of multiple inheritance.

answered Apr 11 '14 at 15:31

tbsalling

score 0 · Answer 2 · answered Apr 11 '14 at 15:32

0

No you can't. In Java you can extend only one base class. You can however implement from multiple interfaces

answered Apr 11 '14 at 15:32

Harry

score 0 · Answer 3 · answered Apr 11 '14 at 15:48

0

For java,no.

in "Tink in java"1.8 Single Root extends structure has mentioned that.

but in C++,yes.

answered Apr 11 '14 at 15:48

Kevin

3 Answers3