Chapter 5.3, Problem 28STQ

Reasons for causing an error message:

• • From the given code, the variables “s1” and “s2” are names of objects of “Species” type; however this program does not create any objects for two names “s1” and “s2” which are just names not objects.
  • ○ Hence, it displays an error message.
• • Object declaration for “Species” class will be as follows:

  Species s1 = new Species();

  Species s2 = new Species();

Correction code:

//Define class "SpeciesEqualsDemo"

public class SpeciesEqualsDemo

{

    //Define main function

    public static void main(String[] args)

    {

        //Create "s1" object for "Species" class

        Species s1 = new Species();

     ...