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Similarities and Difference between Java and C++

  • Difficulty Level : Medium
  • Last Updated : 18 Oct, 2021

Nowadays Java and C++ programming languages are vastly using in competitive coding. Due to some awesome features, these two programming languages are mostly used in Industry also. C++ is a widely popular language among coders for its efficiency, high speed, and dynamic memory utilization. Java is widely in the IT industry, It is incomparable with any other programming language in terms of software development. 
Let’s go through the various points to compare these popular coding languages: 

 

Similarities between Java and C++

  1. Execution: At compile-time, Java source code or .java file is converted into a bytecode or .class file. At runtime, JVM(Java Virtual Machine) will load the .class file and will convert it to machine code with the help of an interpreter. After compilation of method calls(using Just-In-Time (JIT) compiler), JVM will execute the optimized code. So Java is both compiled as well as an interpreted language

    On the other hand, C++ executes the code by using only a compiler. The C++ compiler compiles and converts the source code into the machine code. That’s why c++ is faster than Java but not platform-independent. 

    Below is the illustration of how Java and C++ code are executed: 

    Execution of a Java Code 
     

  1. Execution of C++ code 
     

 

  2. Features: C++ and Java both have several Object Oriented programming features which provide many useful programming functionalities.      Some feature is supported by one and some are not. 
                Below is the table which shows the features supported and not supported by both the programming languages: 
 

Features C++ Java
Abstraction Yes Yes
Encapsulation Yes Yes
Single Inheritance Yes Yes
Multiple Inheritance Yes No
Polymorphism Yes Yes
Static Binding Yes Yes
Dynamic Binding Yes Yes
Operator Overloading Yes No
Header Files Yes No
Pointers Yes No
Global Variables Yes No
Template Class Yes No
Interference and Packages No Yes
API No Yes
  1. Application: Both C++ and Java have vast areas of application. Below is the application of both languages: 
    • Application of C++ Programming language: 
      1. Suitable for Developing large software(like passenger reservation system).
      2. MySQL is written by C++.
      3. For fast execution, C++ is majorly used in Game Development.
      4. Google Chromium browser, file system, cluster data processing are all written in C++.
      5. Adobe Premiere, Photoshop, and Illustrator these popular applications that are scripted in C++.
      6. Advance Computations and Graphics- real-time physical simulations, high-performance image processing.
      7. C++ is also used in many advanced medical equipments like MRI machines, etc.
    • Application of Java Programming language: 
      1. Desktop GUI Applications development.
      2. Android and Mobile application development.
      3. Applications of Java are in embedded technologies like SIM cards, disk players, TV, etc.
      4. Java EE(Enterprise Edition) provides an API and runtime environment for running large enterprise software.
      5. Network Applications and Web services like Internet connection, Web App Development.
  2. Environment: C++ is Platform dependent while Java is the platform-independent programming language. We have to write and run C++ code on the same platform. Java has the WORA(Write Once and Run Everywhere) feature by which we can write our code in one platform once and we can run the code anywhere. 
     

Differences between Java and C++:
 

Parameters Java C++
Founder Java was developed by James Gosling at Sun Microsystems. C++ was developed by Bjarne Stroustrup at Bell Labs since 1979 as an extension of the C language.
First Release On May 23, 1995 In October 1985
Stable Release Java SE 14 or JDK 14 was released on March 17, 2020. C++17 was released in December 2017.
Official Website oracle.com/java isocpp.org
Influenced By: Java was Influenced by Ada 83, Pascal, C++, C#, etc languages. C++ was Influenced by Influenced by Ada, ALGOL 68, C, ML, Simula, Smalltalk etc language.
Influenced to: Java was influenced to develop BeanShell, C#, Clojure, Groovy, Hack, J#, Kotlin, PHP, Python, Scala, etc languages. C++ was influenced to develop C99, Java, JS++, Lua, Perl, PHP, Python, Rust, Seed7, etc languages.
Platform Dependency Platform independent, Java bytecode works on any operating system. Platform dependent should be compiled for different platforms.
Portability It can run in any OS hence it is portable. C++ is platform-dependent hence it is not portable.
Compilation Java is both Compiled and Interpreted Language. C++ has only Compiled Language.
Memory Management Memory Management is System Controlled. Memory Management in C++ is Manual.
Virtual Keyword It doesn’t have Virtual Keyword. It has Virtual Keyword.
Multiple Inheritance It supports only single inheritance. Multiple inheritances are achieved partially using interfaces. It supports both single and multiple Inheritance.
Overloading It supports only method overloading and doesn’t allow operator overloading. It supports both methods and operators overloading.
Pointers It supports limited support for pointers. It strongly supports Pointer.
Libraries It doesn’t support direct native library calls but only Java Native Interfaces. It supports direct system library calls, making it suitable for system-level programming.
Libraries libraries have a wide range of classes for various high-level services C++ libraries are comparatively low-level functionalities.
Documentation Comment It supports documentation comment (e.g, /**.. */) for source code. It doesn’t support documentation comments for source code.
Thread Support Java supports documentation comment (e.g, /**.. */) for source code C++ doesn’t have built-in support for threads, depends on third-party threading libraries.
Type Java is the only object-oriented programming language. C++ is both a procedural and object-oriented programming language.
Input-Output mechanism Java uses the (System class) System.in for input and System.out for output. C++ uses cin for input and cout for an Output operation.
goto Keyword Java doesn’t support goto Keyword C++ supports goto keyword.
Structures and Unions Java doesn’t support Structures and Unions. C++ supports Structures and Unions.
Parameter Passing Java supports only the Pass by Value technique. C++ supports both Pass by Value and pass by reference.
Global Scope It supports no global scope. It supports both global scope and namespace scope.
Object Management Automatic object management with garbage collection. It supports manual object management using new and deletes.


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