How to initialise id in objects so that every new object has id 1 greater than prevs

Is it possible to initialise id in objects so that every new object has id 1 greater than previous object.

Id is like a variable in the class. So if the first object is formed id has value 550 for the first object. For the second object Id has value 551. third -552 and so on.

We cannot use static as the id becomes common to all the classes and it increases for each and every object.

Quote:

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Originally Posted by dayal.adi

We cannot use static as the id becomes common to all the classes and it increases for each and every object.

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Yes but you could use two variables, one as a static variable (counter) and one for the id (object value)

Code:

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class Foo{
        private static int counter = 550;
        private int id;
       
        public Foo(){
                this.id = counter++;
        }
}

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??

I wrote little program based on @eRaaaa's idea:

Code:

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public class Foo {
        private static int counter = 550;
        private int id;
       
        public Foo() {
                this.id = counter++;
        }
       
        public int getId() {
                return id;
        }
       
        public static void main(String[] args) {
                Foo firstObject, secondObject, thirdObject;
               
                firstObject = new Foo();
                System.out.println("First object's id: " + firstObject.getId());
                secondObject = new Foo();
                System.out.println("Second object's id: " + secondObject.getId());
                thirdObject = new Foo();
                System.out.println("Third object's id: " + thirdObject.getId());
        }
}

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