 class Test3-12
    {
         public static void main(String[] args)         
         {
             Student stu1 = new Student("",10011,11);  
             System.out.println(stu1.getCount());                //1
             Student stu2 = new Student("",10012,12);   
             System.out.println(stu2.counter);                   //2
             Student stu3 = null;
             System.out.println(stu3.counter);                   //2
             System.out.println(Student.counter);                //2             
         }
    }//end of class Main
class Student
    {
         int stu_code;                               
         String stu_name;                            
         int deptCode;                              
         static int counter = 0;                                    
         protected Student(String name,int sCode,int dCode)  
         {
             counter++;
             stu_name = name;                         
             stu_code = sCode;                        
             deptCode = dCode;                       
         } 
         int getCount()
         {
            return counter;
         }        
    }//end of class Student
