need answer for these

hi all . im new to this forum and java . I need answers for these questions cuz im not clear with them.
:confused:
1.What is a class? What is the difference between a class and an object?

2.Does java support the concepts of multiple inheritance & pointers? If not why?

3.What is a Null object?

4.Which part of Java is platform independent ? Explain how Architecture neutral is achieved in Java.

What did a web search tell you? The answers are there, with probably a lot more detail than we can reiterate and within a few milliseconds rather than waiting for someone to respond. Just do the search
Google: What is a class
and if you have more specific questions feel free to ask

Quote:

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Originally Posted by satishbs

3.What is a Null object?

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I will answer this one as many people misinterpret this and it may not be explained sufficiently.

There is no such thing as a null object, only null references.

Code java:

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Foo f = new F();

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In this code the variable f is not a Foo object. It is a variable that holds a reference to a Foo object. If you set the variable to null it becomes a null reference not a null object.