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difference between Java and C++

Posted on 2011-02-28
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I am currently learning Java and I already know  C++.  the book I am reading said Java  is missing some of the harder components of C++.  Does anyone know what these are?  I might not know how to use them in C++ either but I'd like to know what they are.
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Question by:dwcronin
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for_yan earned 400 total points
ID: 35003476
One thing which is often mentione is that Java does not support
operator oveerloading supported by C++ - this is the feature which allows
to provide special menaing to such oprators as +, -, etc, within certain classes
These sometimes make reading C++ program difficult

The most obvious thing is that Java does not support pointers - they may also sometimes
be difficult to understand.

Also java requires all code to be within classes. In C++ you may have codes
outside any classes. In this way Java becomes
more organized.  

Therefore it is easier to understand Java code, on the other hand C++
can be more flexible.

Of course one can find some papers about the differences; these are just thisng which come
up perhaps most often.



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by:for_yan
ID: 35003481


There is below sectooion C++ concepts missing in Java;
http://www4.ncsu.edu/~kaltofen/courses/Languages/JavaExamples/cpp_vs_java/
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by:for_yan
for_yan earned 400 total points
ID: 35003487
Yes, also important thing which makes java easier - is that it does not allow multiple inheritance -
class can  have only one superclass
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LVL 47

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by:for_yan
ID: 35003493
And this page also has a few interesting points on this subject from the point of view of C++ programmers:
 
http://www.programmersheaven.com/mb/CandCPP/237865/237875/re-from-c++-to-java/?S=B20000
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by:phoffric
phoffric earned 100 total points
ID: 35003514
Java's garbage collection removes the memory leak issue to a large degree.
Java does not support multiple inheritance which can cause problems if not careful. Instead, they emulate the C++ abstract class interface.
Java does not support pointers or pointer arithmetic, which is often tricky to use in C++ (although convenient).
Java's code is more portable than C++ code. Unfortunately, there are so many releases of Java per decade that a currently built program may not run on an older JVM.

Here is a list of differences:
   http://en.wikipedia.org/wiki/Comparison_of_Java_and_C%2B%2B

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by:phoffric
ID: 35003520
I didn't see any previous posts, so there appears to be repetition.
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Author Closing Comment

by:dwcronin
ID: 35003550
thank all of you.  You guys were very fast!
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