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1. Java compiles byte code to execute on JVM where as C++ generates machine code.
2. Memory management is automatic in java by garbage collector, manually in C++.
3. Strictly object oriented, C++->object oriented bt support procedure to sm extent.
4. java->operator overloading is not allowed (although there are some default overloading eg string1=string2).

- Anonymous March 11, 2011 | Flag Reply

for starters, java is strictly object oriented not c++. java is run on interpreters after getting converted to bytecode while c++ creates object files, which then are linked to libraries and finally built into executeable code....

there are many more differences, others are requested to pitch in.

- swingingiant January 14, 2011 | Flag Reply

java is true object oriented but c++ lack at some point
java is type safe not c++
java support automatic garbage collection....

- Anonymous March 10, 2011 | Flag Reply

C++
1. Backward compatibility with c
2. Pointers, Templates, Function pointers
3. language for system programming
4. write once compile anywhere.
5. Generates class executables.
6. No automatic garabage collection, explicit memory management thru destructors.
7. Multiple Inheritance
8.supports the goto statement
Java
1.portable
2.write once run anywhere
3.No pointers
4.No backward compatibility with c
5.Garbage Collection, no destructors
6.Generics
7.No function pointers
8.sandboxed secuirty, platform independent
9.methods are virtual by default

- Anonymous March 14, 2011 | Flag Reply

Java does not support Multiple Inheritance,
Java does not support operator overloading

- satish April 04, 2011 | Flag Reply

Java supports operator overloading to some extend;
String str = "string1" + "string2";

- Arun March 22, 2012 | Flag Reply

main difference is JAVA is Complete oops,while C++ is Partial oops...
in java evrythng is under class body.. where as in C++,main is outside.

- rockstar June 03, 2012 | Flag Reply

{{{ Java is not complete OOP, it is ture OOP. as it doesn't supports all the paradigms of OOP. Java doesn't support Multiple inheritance, Operator overloading. Java contains primitive data type viz. int, float, these are not objects. Objects don't communicate via passing message. }}] - k July 30, 2013 | Flag Reply

Simple: Java is to C++ what Lambda Calculus is to Haskell ^^
or in summary: I HATE JAVA

- FBNerd August 25, 2013 | Flag Reply