Difference between java and c++

both java and c++ follows  object oriented programming approach but the main difference is:
c++:
it is a object oriented language, but not platform independent,ieC++ is platform depending meaning that it has to be recompiled for each platform you want it to work on.c++ code is different for each platform(widows,unix,linux)

• compared to java , c++ is faster.

• compared to java, c++ does'nt consists security
• c++ follows MZ format for windows to convert high to low level language in windows and for linux its different so it is platform dependent

java:
java is platform independent language meaning java has byte code, java byte code is like a write once and run any where type.
  basically java consists compiler and interpriter

• compiler converts high level language to byte code which similar to binary code but not completly.

• interpriter interprits each and every line of byte code and converts in to mechine level language, java interpriter is nothing but jvm
• java is slower then c and c++ because java follows sandbox security model.
• in java all compilers are equal but jvm is different for each platform

How long have you got :)

Off the top of my head, some of the main differences are listed below:

1. C++ is compiled directly to native code whereas Java is compiled to an intermediate byte code which is then converted 'on the fly' to native code for the underlying platform.

2. C++ supports multiple inheritance but Java supports only single inheritance.

3. All methods in Java are virtual by default but non-virtual by default in C++.

4. C++ supports pointers but Java does not. 

5. C++ supports passing parameters by reference but Java does not.