PPT Slide

Declares a strName String for each

instance. Thus, each Human will have its

own name. But . . . Also declares an

iPopulation counter for

each instance of Human.

Thus, each Human will have its own

iPopulation variable, each having a

value of 1. This makes no sense!

Instance vs. Class Variables

Suppose we wanted to track the total number of objects created.

Consider:

class Human {

String strName;

int iPopulation = 0;

public Human

(String strName) {

this.strName = strName;

iPopulation++; //WRONG!

} // of constructor

} // of Human