Similarities between Java and C++

Both are very successful and popular programming languages. Though there are many differences between the both, there are considerable similarities which are given as follows:

1. Both C++ and Java supports Object Oriented Programming:

   OOPs is a modular approach, which allows the data to be applied within stipulated program area, It also provides the re-usability feature to develop productive logic, which means to give more emphasis on data. It support classes and objects. OOPs features include:

   • Inheritance: process by which objects of one class can link and share some common properties of objects from another class.
     
   • Polymorphism: Allows us to perform a single action in different ways. It is the process of using a function for more than one purpose.
     
   • Abstraction: It is the act of representing essential features without including the background details.
     
   • Encapsulation.: Wrapping up of data and functions into a single unit.
     

   
   

2. They have similar syntax:

   C++ Syntax:

   #include& lt; iostream & gt; using namespace std;    int main() {     cout& lt;     <     "     Hello World"     ;     return 0; }

   Java Syntax:

   public class first {     public static void main(String[] args)     {         // prints Hello World         System.out.println(" Hello World ");     } }

   
   

3. Comments Syntax are identical:

   Both the single and multiple line comments are written as //…. and /* …. */ respectively.

   
   
   

   C++:

   #include <iostream> using namespace std;    int main() { // main() is where program execution begins     int a = 5, b = 10, sum;     sum = a + b;        /* This will add the values of a and b and will display the output stored in sum */        cout << sum;     return 0; }

   Java:

   public class GFG {        public static void main(String[] args)     { // main() is where program execution begins            int a = 5, b = 10, sum;         sum = a + b;            /* This will add the values of a and b and will display the output stored in sum */            System.out.println(sum);     } }

   
   

4. The loops (like while, for etc.) and conditional statements (like if-else, switch etc.) are similar:

   C++:

   #include <iostream> using namespace std;    int main() {     int a = 5, b = 10;     if (a > b)         cout << a;        else         cout << b;     return 0; }

   Output: 10

   Java:

   public class firstjava {        public static void main(String[] args)     {         // to display the greater number            int a = 5, b = 10;         if (a > b)             System.out.println(a);            else             System.out.println(b);     } }

   Output: 10

   
   

5. Both have same arithmetic and relational operators.

   Arithmetic operators such as +, -, *, /
   Relational operators such as >, <, =, != (not equal to)
   

   
   

6. Execution of both the C++ and Java programs starts from the main function:
   It is the entry point of the execution of the program. However, the function declaration is different, but the name is same.

   C++:

   #include& lt; iostream & gt; using namespace std;    int main() { // main() is where program execution begins     cout& lt;     <     "     Hello World"     ;     return 0; }

   Java:

   public class GFG {     public static void main(String[] args)     {         // main() is where program execution begins         System.out.println(" Hello World ");     } }

   
   

7. They have same primitive data types:
   These include datatypes like int, float, char, double etc. with some differences like the Boolean data type is called boolean in Java but it is called bool in C++.
   
8. Many of their keywords are same:
   Example:

   break, continue, char, double, new, public, private, return, static etc. 

   
   

9. Both have multi threading support:
   Both allow executing multiple threads(sub-processes) simultaneously to achieve multitasking.
   

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