package zoo { 

internal class VirtualPet { 

internal var petName; 

private var currentCalories = 1000; 

private var creationTime; 

public function VirtualPet (name) { 

this.creationTime = new Date( ); 

this.petName = name; 

} 

public function eat (numberOfCalories) { 

this.currentCalories += numberOfCalories; 

} 

public function getAge ( ) { 

var currentTime = new Date( ); 

var age = currentTime.time - this.creationTime.time; 

return age; 

} 

} 

} 

 

package zoo { 

public class Virtual Zoo { 

private var pet; 

 

public function Virtual Zoo ( ) { 

this.pet = new Virtual Pet("Stan"); 

} 

} 

}