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C++ supports multiple inheritance of classes, Java (and C#) supports single inheritence of classes and multiple inheritance of interfaces.

When C++ added multiple-class inheritence pure OOP was thought to be "the" solution to everything.

In the meantime it was proven that class inheritance is good, but it ends up with tightly coupled systems. The more class inheritance you use, the more likely that one small change will have a huge impact on your entire system.

Loosely coupled inheritance - interfaces - are considered a much better option these days.

c++ supports multiple inheritance but java not.
i think that it is a disadvantage of java ,or may be to make the java easier to implement
inheritance.

check wikipedia Diamond_problem page, this is why java does not support multiple inheritance. also called Diamond of Death concept.

Can someone offer us a complete answer?

Can someone offer us a complete answer?

Hmmm.. Lets see if this example makes sense.. "A" defines a method which returns the meaning of "Right" as in Will or Justice.. "B" inherits from A but overrides that method and returns the meaning as Direction.. Now, "C" inherits from A but overrides that method and returns the meaning as Correct.. Now, if D goes and inherits from both B and C (multiple inheritance).. there is no way to find which method to call if we want the meaning of right..

C++, provides multiple inheritance..
Java does not for the above reason.. :).. but you can achieve multiple inheritance through interfaces in java

C++ supports it; Java doesn't.


I think it's bad that Java doesn't support multiple inheritance, and I think that at times, that leads to bad design of certain aspects of Java programs. There are, however, certain difficulties with multiple inheritance that led the creators of Java to decide to not include that feature (look up "dreaded diamond problem" and the like).