[JAVA] ch05-22. 초기화블럭 2

public class Ex22 {
    public static void main(String[] args){
        Product p1 = new Product();
        Product p2 = new Product();
        Product p3 = new Product();
        
        System.out.printf("p1: %d\n",p1.serialNo);
        System.out.printf("p2: %d\n",p2.serialNo);
        System.out.printf("p3: %d\n",p3.serialNo);
        
        System.out.printf("Total: %d", Product.count);
    }
}    

class Product{
    static int count = 0;
    int serialNo;
    {
        serialNo = ++count; // (=) this.serialNo = ++Product.count;
    }
}