static in java

static data member can be created by using static keyword. 

the static keyword has the same value in all instances of the class.

these are  created and initialized when class is loaded for first time.

static block

this block is used to initialize the static members. 

JVM executes static blocks before the main method at the time of class loading.

syntax:

class class_name

{

    static

    {

        //code to execute before main method

    }

        public static void main(String rttr[])

        {        

            //code to execute

        }

    

} 

example:

class Try

{

    static

    {

       System.out.println("this is first");

    }

        public static void main(String rttr[])

        {        

                 System.out.println("this is after first");

   

        }

    

} 

static method

static methods are created by static keyword.

static methods can access only static members. 

there is no need to create an object to call static methods.

example:

class A
{
static void tryToRun()
{
System.out.println("calling static methods");
}
}

class Using
{
public static void main(String a[])
{
A.tryToRun();
}
}

static variables

static variables are used to store data that are initialized when a class is loaded.

example:

class A
{
static int num=10;

}

class Using
{
    public static void main(String a[])
    {

    System.out.println(A.num);

    }
}