Difference between #include in C/C++ and import in JAVA

Last Updated : 14 Jan, 2021

#include in C/C++: In the case of C language, #include is a standard or user-defined file in a program that tells the preprocessor to insert the internal contents of another file into the source code of the program.

Syntax:

#include<stdio.h>

Program 1:
Below is a C Program to demonstrate the use of #include:

// C Program to demonstrate use of #include
#include <stdio.h>

// Header file loads all the
// necessary Input output
// file at beginning only

// Driver Code
int main()
{
    printf("GeeksforGeeks");
    return 0;
}

Output:

GeeksforGeeks

import in Java: In JAVA, the import statement is used to load the entire package or some classes in a package. It is written before the definition of the class and after the package statement(if present).

Syntax:

import java.util.*;

Program 2:
Below is a Java program to demonstrate the use of the import statement:

Java

// Java program to demonstrate use of import
import java.io.*;

// import statement doesn't load
// all the necessary files at
// beginning rather it loads
// only those files which it
// needs at the runtime
class GFG {
    public static void main(String[] args)
    {
        System.out.println("GeeksforGeeks");
    }
}

Output:

GeeksforGeeks

Both #include in C/C++ and import in Java is used to load predefined header files or packages but there are certain differences which are listed below:

S No.	#include in C/C++	import in Java
1	It is mandatory to use the #include statement to include standard header files.	Import statement in java is optional
2	It loads the file at the beginning only.	No class files will be loaded at the beginning. Whenever a particular class is used then only the corresponding class file will be loaded.
3	Unnecessary waste of memory and processor's time.	No such waste of memory and processor's time.
4	Size of the program increases.	No increase in the size of the program.
5	It is also called as static include.	It is also called as dynamic include.

Difference between #include in C/C++ and import in JAVA

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