What is a STATIC METHOD and what is a difference between INSTANCE METHOD AND STATIC METHOD IN JAVA??

 INTRODUCTION:

         Hey friends.. In this post I will explain you of what a static method actually is.. and the main difference between static method and instance method. 

WHAT IS A STATIC METHOD..

         I have already explained in detail of why the main ( ) method is static and other stuffs.. If you haven’t gone through it please refer this why is main method static

 

          When a method is declared as STATIC there is no need for object creation..!!

          If you know this already ..its fine.. but who doesn’t know this yet.. their reaction currently will be … OH..REALLY ??

       Yes.. we need not create any objects while calling that method..

  EXAMPLE:

      Class classname

      {

      static void block( )

        {

            System.out.println(“static method is executed”);

        }

       public static void main(String args[])

         {

           block( );

          }

       OUTPUT:

       static method is executed 

     EXPLANATION:

       Usually static block cannot access normal variables and methods directly. It can access only by  creating objects.

      Since the block( ) is a static method.. it can be accessed from the main ( ) block which is a static method.

      So, as you can see, block( ) method is been accessed directly without any object creation done for it.

    INSTANCE METHODS VS STATIC METHODS:

     Consider the following example ..

        Class classname

           {

             static void block( )

                {

                  System.out.println(“static method is executed”);

                }

               void NormalMethod( )

               {

                  System.out.println(“normal method is executed”);

               }

             Public static void main(String args[])

               {

                block( );

                classname c = new classname( );

                c.NormalMethod( );

               }

       OUTPUT:

        static method is executed

        normal method is executed

  EXPLANATION:

          In the above example.. the static block is accessed directly and the Instance method(normal method) is accessed by creating the objects.

        Object is created for the class and the method "NormalMethod" is accessed and so the output.

        We can’t access any NON- STATIC methods without object.

  ACCESSING STATIC METHODS OUTSIDE THE CLASS:

     Suppose if there is a situation where we want to access any STATIC METHODS OUTSIDE THE CLASS then, it must be accessed by the class name

      EXAMPLE:

        Class classname

          {

            static void StaticMethod( )

              {

                 System.out.println(“static method is executed”);

              }

          Class SecondClass

          {

            Public static void main(String args[])

             {

               classname.StaticMethod ( );

             }

          } 

  OUTPUT:

      static method is executed

  EXPLANATION:

         Here..

 classname.StaticMethod ( ); must be written in order to call the static method which is present inside the class classname ..where, “classname” is the name of the class from where the static method “StaticBlock” resides. 

         So..its as simple as that..

         Just have 2 things in mind..

         If a static method is inside the same class.. then no need for object creation.. just call the method

         While if the static method is in different class then call to that method must be like “classname.static method name “ 

CONCLUSION:

        So.. that’s it for this post friends.. hit like button and drop your feedback/ comments below.

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