$"$So if I have two objects from the main class and I$\text{'}$m trying to add them together. how can I create a method to add whatever those two objects?

MA$03$

I tried to do it here but I could not finish it$.$

package Bright;

public class partic $\{$

public int conNumber;

public partic$($int number$)\{$

conNumber $=$ number;

$\}$

public partic add$($partic sum$)\{$

return null;

$\}$

$\}$

$--------------------------------$

package Bright;

public class particDemo $\{$

public static void main $($String$[]$ args$)\{$

partic val$1=$ new partic$(23)$;

System.out.println$(""$val one is $""+$ val$1.$conNumber$)$;

partic val$2=$ new partic$(54)$;

System.out.println$(""$val one is $""+$ val$2.$conNumber$)$;

partic sum;

sum $=$ val$1.$add$($val$2)$;

System.out.println$(""$The sum: $""+$ sum$)$;

$\}$

$\}"$