you would like to know all the factors, advantages, etc. that makes C++ better than Java.

I am a c/c++ expert for 8+ years now based in owerri. I sometimes travel to Ibadan, abuja, Lagos for contract work. I work as backend engineer.


Firstly, I'd be cautious to make a claim that C/C++ is better than Java. There are pros and cons to both sides. C/C++ is basically more powerful to the programmer (since one can break past all sorts of abstractions), and runs natively instead of on a virtual environment (and hence is also platform dependent). A C++ application can manage its own memory in more finer ways than a Java app can. In C++, one can overload operators, access physical addresses and override values there. One can throw and catch any type (...) and do some nasty stuff around all that. On the other hand, in Java, one can sit back and basically just deal with OO abstractions and code them up in one-way, regardless of the underlying platform. Fine-grained memory management is harder. One can play around with GC params for optimizations and get really far this way, but anything more is not really achievable. In C++, you can easily get as deep as you want to. But, also remember, with great power comes great responsibility . An irresponsible Java developer would be less harmful to your software, than an irresponsible C++ developer would be. In that sense, Java is a relatively easier and simpler language to work with, than C++ is. With C++, a lot of responsibility and burden is on the shoulders of the programmer and with Java, a lot of this, is taken care of, by the system. There is also a popular performance myth
with C++ and Java. Since C++ runs natively, it used to run faster in most platforms than Java does, given the VM is basically emulated. However, this is increasingly being rendered moot, as JVMs end up being very powerful, and processor speeds and architectures have evolved a lot over time.


1. Import vs the C preprocessor

import java.lang.String;

#include <string>
using namespace std;

2. Memory Allocation
Java handles memory for you, automatically freeing memory when it is no longer used (garbage collecting it). In C and C++, you must deallocate memory that was allocated:
in c++
int *p_int = new int ;
// use p_int
delete p_int;

in java
int [] values = new int [ 10 ];
values[ 20 ] = 2 ; // error! You get an ArrayIndexOutOfBoundsException

That language is very thick.Tried it before though (up to the class level) and it was cool.What really discouraged me is that to create a gui app with c++ is one hell of a pain in the neck.what exactly do you do with c++ as a backend engineer?

wisemania:
That language is very thick.Tried it before though (up to the class level) and it was cool.What really discouraged me is that to create a gui app with c++ is one hell of a pain in the neck.what exactly do you do with c++ as a backend engineer?

thanks for asking. I Develop of core functionalities within a UMTS/LTE Core Network Involvement in the full product life cycle and also I do research, design, coding, testing and maintenance on a contract based.

Please op I need a mentor. I've been with C++ for a while. Care to help?

Nice post @ OP... Your explanations are well drafted...


However, I'd love a good Java programmer to list some factors that makes Java worth learning over C++....

Djangocode:
Nice post @ OP... Your explanations are well drafted...


However, I'd love a good Java programmer to list some factors that makes Java worth learning over C++....

To a new learner, like the OP mentioned, you don't have to worry about de-allocating memory in the heap since the JVM takes care of that for you whereas in C++, with pointers, you have to delete the allocation. C++ is less forgiving than Java for someone who is just starting out. It makes sense though as C++ is an older language and is just an Object-oriented version of C. Java is also based on C as well.

Java is more similar to C#. Both are very similar in object creation and object de-allocation. One thing is that with newer OOP languages is that memory in the heap is often taken care of for you (Swift, Java, C#, etc.).

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Fulaman198:


To a new learner, like the OP mentioned, you don't have to worry about de-allocating memory in the heap since the JVM takes care of that for you whereas in C++, with pointers, you have to delete the allocation. C++ is less forgiving than Java for someone who is just starting out. It makes sense though as C++ is an older language and is just an Object-oriented version of C. Java is also based on C as well.

Java is more similar to C#. Both are very similar in object creation and object de-allocation. One thing is that with newer OOP languages is that memory in the heap is often taken care of for you (Swift, Java, C#, etc.).

Thanks Bro...


So the Memory thing is the major difference between the two..? Are there any other differences, Like speed, ease of learning, how they implement OOP concepts etc

Djangocode:


Thanks Bro...


So the Memory thing is the major difference between the two..? Are there any other differences, Like speed, ease of learning, how they implement OOP concepts etc

When you create a new object in Java, you use the new keyword. Let's say for instance you have a class called Square in Java. You would create an object like this:

Square square1 = new Square(5); //create a new object of type square with a side length of 5

To create an Object in C++ from the class Square, all you would do is this:

Square square1(5); //Create a new square object of type square with a side length of 5

In C++ there is also the concept of Destructor which deletes the object. In Java, the JVM takes care of Objects in the heap for you. In C++ you do it by yourself. Destructors are often created after the constructor in C++ and are represented with a tilde (~)

Fulaman198:


When you create a new object in Java, you use the new keyword. Let's say for instance you have a class called Square in Java. You would create an object like this:

Square square1 = new Square(5); //create a new object of type square with a side length of 5

To create an Object in C++ from the class Square, all you would do is this:

Square square1(5); //Create a new square object of type square with a side length of 5

In C++ there is also the concept of Destructor which deletes the object. In Java, the JVM takes care of Objects in the heap for you. In C++ you do it by yourself. Destructors are often created after the constructor in C++ and are represented with a tilde (~)

Thanks mate...


So Java takes care of some underlying actions for you whereas in C++, the programmer codes all those actions by himself...

Djangocode:


Thanks mate...


So Java takes care of some underlying actions for you whereas in C++, the programmer codes all those actions by himself...

Correct, Java in fact isn't the only language that does that, Swift created by Apple does it as well as C#. The newer OOP languages seem to be able to take care of underlying actions.

Fulaman198:


Correct, Java in fact isn't the only language that does that, Swift created by Apple does it as well as C#. The newer OOP languages seem to be able to take care of underlying actions.

Thanks for the response...

Now to the Java part, diving into OOP as a newbie programmer can be a daunting task as Java is OOP based.... What advise would you give someone who wants to delve into Java programming??

Djangocode:


Thanks for the response...

Now to the Java part, diving into OOP as a newbie programmer can be a daunting task as Java is OOP based.... What advise would you give someone who wants to delve into Java programming??

I would say take it slowly, Java isn't meant to be mastered in a month's time. Review areas they are not strong in and ask questions pertaining to the difficult areas that they don't fully understand.

Fulaman198:


I would say take it slowly, Java isn't meant to be mastered in a month's time. Review areas they are not strong in and ask questions pertaining to the difficult areas that they don't fully understand.

Thanks for your answers...

The problem I have with c++ is the tendency to drift from concentrating on your main programs logic and start dealing with memory allocation and deallocation especially as one writes complex programs.
Sometimes this can or could (I stand to be corrected) make a programmer struggle to remember where he was in the main programs logic once he has dealt with deallocating some memory.
Basically I feel its a huge distraction as you really don't want to be disturbed especially when that idea on how to solve your program is flowing and you just want to out it down in code.
Cheers

C++ is a low level language which java is the opposite.
C++ is good for building network app, cmd app, console games, etc
Java app can run on all platforms where JVM is present.

guru01:
C++ is a low level language which java is the opposite.
C++ is good for building network app, cmd app, console games, etc
Java app can run on all platforms where JVM is present.

C++ is a high-level language just like Java. Assembly for instance is a low-level language very similar to machine code.

Java is also great (if not better) for building network based apps, command apps, etc.

C++ is better for building drivers (firmware) or different products like Routers, Graphics card drivers, etc.

For console games, I would say that C++ does indeed have the advantage as most games are still built in C/C++

mexzony:
The problem I have with c++ is the tendency to drift from concentrating on your main programs logic and start dealing with memory allocation and deallocation especially as one writes complex programs.
Sometimes this can or could (I stand to be corrected) make a programmer struggle to remember where he was in the main programs logic once he has dealt with deallocating some memory.
Basically I feel its a huge distraction as you really don't want to be disturbed especially when that idea on how to solve your program is flowing and you just want to out it down in code.
Cheers

That's true, as aforementioned, C++ is less-forgiving than its sibling languages like Java and C#. You don't have to worry about memory de-allocation in newer OOP languages.