Prey-Predators in Java

Preys are blue and are running away from predators which are red. Predators are pursuing preys and kill them when they succed to catch them. Preys and predator have a restricted visibility area and are randomly moving when there is nothing in it.

Preys and predators extend the class Icobj and applets extend the class IcobjWorkspace. Preys are instances of class Prey and predators are instances of class Predator.

Initially, there are 50 preys and two predators. These numbers can be changed from a little control panel which appears on screen. Demos are started by clicking in the start button in the control panel.
In the non-thread version, all preys and predators are run by one unique thread. Here is the mono threaded applet with its code.
In the milti-threaded version, each prey and each predator is run by its own thread. Here is the multi threaded applet with its code.
One can see that the multi-threaded applet is less efficient as the number of preys and predators becomes larger.

This example shows that threads are not well suited to concurrent systems with a large number of small sized components.