Java Program To Static Member Variable Example

/*
        Java static member variable example
        This Java Example shows how to declare and use static member variable inside
        a java class.
*/

public class StaticMemberExample {
     
        public static void main(String[] args) {
             
                ObjectCounter object1 = new ObjectCounter();
                System.out.println(object1.getNumberOfObjects());
             
                ObjectCounter object2 = new ObjectCounter();
                System.out.println(object2.getNumberOfObjects());
                             
        }
}

class ObjectCounter{

        /*
         * Static members are class level variables and shared by all the objects
         * of the class.
         *
         * To define static member, use static keyword
         * e.g. static int i=0;
         *
         * Please note that static member variables can be accessed inside
         * non static methods because they are class level variables.
         *
         */
        static int counter=0;
     
        public ObjectCounter(){
             
                /*increase the object counter. Since only one varible is shared between
                 * all objects of this class, it always return number of objects till now.
                 */
                counter++;
        }
     
        //returns number of objects created till now
        public int getNumberOfObjects(){
                return counter;
        }
}