java - Method overriding and inheritance -

public class circle {      public static final double pi = 3.141592654;     protected double radius;      public circle(double radius) {         this.radius = radius;     }      @override     public string tostring() {         return "class = " + getclass().getsimplename() + " (radius = " + radius + ")";     } }   public class planecircle extends circle {      private double centerx, centery;      public planecircle(double radius, double centerx, double centery) {         super(radius);         this.centerx = centerx;         this.centery = centery;     }      @override     public string tostring() {         return super.tostring();     } } 

suppose above 2 classes in different files.

when create instance of planecircle (in java file) following 2 lines...

planecircle planecircle1 = new planecircle(3, 6, 7); system.out.println(planecircle1.tostring()); 

what in console output is

class = planecircle (radius = 3.0) 

the tostring() method in planecircle calls super.tostring(), , tostring() method in circle should give "circle" when use getclass().getsimplename().

my question is, why output "planecircle" instead of "circle" in case though have created instance of subclass (planecircle)? have reflection?

planecircle1 instance of planecircle, means getclass() return planecircle.class (i.e. class instance represents planecircle class) , getclass().getsimplename() return class's name - "planecircle".

it doesn't matter getclass().getsimplename() called method of base class circle, since when call method without instance variable, calling on current instance (i.e. getclass() same this.getclass(), , this instance of planecircle in code sample).