Step 4

Demo class

public class Demo
{
    public static void main(String[] args)
    {
        Coordinate2D c1 = new Coordinate2D(5, 6);
        System.out.println(c1);
        /* paused here */
    }
}

When c1 is printed, Java checks if c1 points to (stores the memory address of) an object. c1 does point to an object. Java automatically runs the toString method on the object to which c1 points. The Coordinate2D toString method returns a String in the form (x, y).

The code segment prints:

(5, 6)

Memory diagram

c1 pointing to a box containing x with value 5 and y with value 6

The diagram is the same as in Step 3.

Back to Step 3
Back to main example