Java program for static variables

 class Box

{

 static double width;

 static double height;

 static double depth;

 public static void main(String ar[])

 {

  Box b1 = new Box();

  Box b2 = new Box();

  double vol;

  b1.width = 10;

  b1.height = 20;

  b1.depth = 15;

  b1.width = 3;

  b1.height = 6;

  b1.depth = 9;

  vol = b1.width*b1.height*b1.depth;

  System.out.println("Volume is "+vol);

  vol = b2.width*b2.height*b2.depth;

  System.out.println("Volume is "+vol);

  }

}

OUTPUT