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              JAVA STATIC FUNCTIONS

 

 

Ø What are static function ?

Static methods are the methods which are declare in static keyword these methods are not dependent on objects i.e., they are called directly in a class.

// Java program to call a static method

  

class GFG {

  

    // static method

    public static int sum(int a, int b)

    {

        return a + b;

    }

}

  

class Main {

    public static void main(String[] args)

    {

        int n = 3, m = 6;

  

        // call the static method

        int s = GFG.sum(n, m);

  

        System.out.print("sum is = " + s);

    }

}

  

Output:

sum is = 9

 

 

 

 

 

Ø What are non- static function?

 

Non-static function which dosen’t required any keyword to declare these function must be called by an function these function are dependent on objects for calling.

 

Java program to call a non-static method

  

class GFG { 

Java program to call a non-static method

  

class GFG 

    // non-static method

    public int sum(int a, int b)

    {

        return a + b;

    }

}

  

class Main {

    public static void main(String[] args)

    {

        int n = 3, m = 6;

        GFG g = new GFG();

        int s = g.sum(n, m);

        // call the non-static method

  

        System.out.print("sum is = " + s);

    }

}

Output:

sum is = 9

 

Uses of keyword in program :-

·     Static- use without object .

·      Public-  acess modifier which make sure main() can be used anywhere  in the program.

·      Void:- Main function well not return any value.

·      Main:- First method to be excuted in java application .

·      String:-  It’s a class.

·      args[] - array of string type .

 

 

 

 

Difference table:

 

POINTS	STATIC METHOD	NON-STATIC METHOD
Definition	A static method is a method that belongs to a class, but its not belongs to an instance of that class and this method can be called without the instance or object of that class.	Every methods in java are non-static method, but the methods must not have static keyword before method name. non-static methods can access any static method and static variable also, without using the object of the class.
Accessing members and methods	In static method, the method can only access only static data members and static methods of another class or same class but cannot access non-static methods and variables.	In non-static method, the method can access static data members and static methods as well as non-static members and method of another class or same class.
Binding process	Static method uses compile time or early binding.	Non-static method uses runtime or dynamic binding.
Overriding	Static method cannot be overridden because of early binding.	Non-static method can be overridden because of runtime binding.
Memory allocation	In static method, less memory is use for execution because memory allocation happens only once, because the static keyword fixed a particular memory for that method in ram. .	In non-static method, much memory is used for execution because here memory allocation happens when the method is invoked and the memory is allocated every time when the method is called.

 

HOW TO EXECUTE  & RUN  THE CODE

 

OUTPUT

JVM

eg.java