I have a problem with constructors ... I never understood how they work. At Caine c=new Caine(); Animal c1=new Caine(); Pisica p=new Pisica(); Error: Constructor Caine in Caine class cannot be applied to given class

package test2;
public class Test2 {

 public static void main(String\[\] args) {
     ListaAnimale lista= new ListaAnimale();
     Caine c=new Caine();   
     Animal c1=new Caine();        
     Pisica p=new Pisica();
     lista.adauga(c);
     lista.adauga(p);
     c.faceZgomot();
 }

}
class ListaAnimale{
private Animal [] animale = new Animal[5];
private int index=0;
public void adauga(Animal a){
if(index