This Keyword Program

Write a program in java to demonstrate the This Keyword

 
public class ThisDemo 
{
 int w,h,d;
 ThisDemo()
 {
  this(10,10,10);
 }
 ThisDemo(int w,int h,int d)
 {
  this.w=w;
  this.h=h;
  this.d=d;
 }
 ThisDemo(ThisDemo t3)
 {
  this(t3.w,t3.h,t3.d);
 }
 void setvalue(int w,int h,int d)
 {
  this.w=w;
  this.h=h;
  this.d=d;
 }
 void result()
 {
  System.out.println("Box volume is:"+(w*h*d));
 }
 public static void main(String[] args) 
 {
  ThisDemo t=new ThisDemo();
  t.result();
  
  ThisDemo t1=new ThisDemo(t);
  t1.result();
  
  ThisDemo t2=new ThisDemo();
  t2.setvalue(10, 20, 30);
  t2.result();
 }
}
Output