contestada

Consider the following class. public class ClassicClass { private static int count = 0; private int num; public ClassicClass() { count++; num = count; } public String toString() { return count + " " + num; } } What is printed when the following code in the main method of another class is run? ClassicClass a = new ClassicClass(); ClassicClass b = new ClassicClass(); ClassicClass c = new ClassicClass(); System.out.println(a + ", " + b + ", " + c);

Respuesta :

batolisis

The the code in the main method is run, it will print

"3 1, 3 2, 3 3"

The static/class field count stores the number of instances of the class created. count is always incremented when the instance constructor is called.

The instance field num acts like an identifier/serial number for the instance created. When the constructor is called, the current count is stored in the num field of the instance.

Each instance's toString( ) method will output the total count (from count) and the serial of the instance (from num).

When the code runs in the main method, it creates three instances (making count==3), so that we have

  • a = {count: 3, num: 1}
  • b = {count: 3, num: 2}
  • c = {count: 3, num: 3}

and implicitly calls toString( ) in the println method for each of the three instances to produce the following output

"3 1, 3 2, 3 3"

Learn more about programs here: https://brainly.com/question/22909010

Otras preguntas