What is the difference between C++ and java Programming languages

Both Java and C++ support object oriented programming, yet there are differences between them. To begin with, Java is a pure object oriented programming language; therefore, everything is an object in Java (single root hierarchy as everything gets derived from java.lang.Object). On the contrary, in C++ there is no such root hierarchy. C++ supports both procedural and object oriented programming; therefore, it is called a hybrid language.

Java

Java does not support pointers, templates, unions, operator overloading, structures etc.

The Java language promoters initially said “No pointers!”, but when many programmers questioned how you can work without pointers, the promoters began saying “Restricted pointers.” Java supports what it calls “references”. References act a lot like pointers in C++ languages but you cannot perform arithmetic on pointers in Java. References have types, and they’re type-safe. These references cannot be interpreted as raw address and unsafe conversion is not allowed.

Java support automatic garbage collection. It does not support destructors as C++ does.

Java does not support conditional compilation and inclusion.

Java has built in support for threads. In Java, there is a Thread class that you inherit to create a new thread and override the run() method.

Java does not support default arguments. There is no scope resolution operator (::) in Java. The method definitions must always occur within a class, so there is no need for scope resolution there either.

There is no goto statement in Java. The keywords const and goto are reserved, even though they are not used.

Java doesn’t provide multiple inheritance, at least not in the same sense that C++ does.

Exception handling in Java is different because there are no destructors. Also, in Java, try/catch must be defined if the function declares that it may throw an exception.

Java has method overloading, but no operator overloading. The Stringclass does use the + and += operators to concatenate strings and Stringexpressions use automatic type conversion, but that’s a special built-in case.

Java has built-in support for documentation comments (/** ... */); therefore, Java source files can contain their own documentation, which is read by a separate tool usually javadoc and reformatted into HTML. This helps keeping documentation maintained in easy way.

Java is interpreted for the most part and hence platform independent.

C++

C++ supports structures, unions, templates, operator overloading, pointers and pointer arithmetic.

C++ support destructors, which is automatically invoked when the object is destroyed.

Conditional inclusion (#ifdef #ifndef type) is one of the main features of C++.

C++ has no built in support for threads. C++ relies on non-standard third-party libraries for thread support.

C++ supports default arguments. C++ has scope resolution operator (::) which is used to to define a method outside a class and to access a global variable within from the scope where a local variable also exists with the same name.

C++ has goto statement. However, it is not considered good practice to use of goto statement.

C++ does support multiple inheritance. The keyword virtualis used to resolve ambiguities during multiple inheritance if there is any.

While in C++, you may not include the try/catch even if the function throws an exception.

C++ supports both method overloading and operator overloading.

C++ does not support documentation comments.

C++ generates object code and the same code may not run on different platforms.

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