java penname.java
error: can’t find main(String[]) method in class: Pen

class Pen {

String color;

public void printColor() {

   System.out.println("The color of this Pen is " + this.color);

}

}

public class penname {

public static void main(String args[]) {

   Pen p1 = new Pen();

   p1.color = "blue";


   Pen p2 = new Pen();

   p2.color = "black";


   Pen p3 = new Pen();

   p3.color = "red";


   p1.printColor();

   p2.printColor();

   p3.printColor();

}

}

this code is getting compiled correctly but upon running it is showing me the above error