Source code

 package org.kaariboga.agents;

 import java.lang.InterruptedException;
 import java.lang.Thread;

 import org.kaariboga.core.Kaariboga;


 /**
  * The Reproducer agent is able to load other agents.
  */
 public class Reproducer extends Kaariboga
 {
     /**
      * Number of childs the agent will create.
      */
     public int nChilds = 3;

     /**
      * Just initialize the super class.
      *
      * @param name The name of the agent. This name has to be
      * unique. Normally the KaaribogaBase class provides some
      * method to generate a unique name.
      */
     public Reproducer(String name){
         super("Reproducer_" + name);
     }

     /**
      * After an initial sleep period (grow up) the agent gives birth to new childs.
      */
     public void run(){
         try{
             System.out.println ("Hurray, I am born.");
             Thread.currentThread().sleep(500);
             for (int i = 0; i < nChilds; i++){       
                      Reproducer agent = new Reproducer(base.generateName());
                      agent.nChilds = nChilds - 1;
                 base.addKaaribogaOnCreation (agent, null);
             }
         }
         catch(java.lang.InterruptedException e){}

         System.out.println ("Agent is dies after " + nChilds + " childs.");
         fireDestroyRequest();
     }
 }

  public int nChilds = 3;

Each agent will give birth to nChilds. The number of childs is decreased in each generation.

  Thread.currentThread().sleep(500);
  for (int i = 0; i < nChilds; i++){       
      Reproducer agent = new Reproducer(base.generateName());
      agent.nChilds = nChilds - 1;
      base.addKaaribogaOnCreation (agent, null);
  }

Before the agent does something it goes to sleep for while (grows up): Thread.currentThread().sleep(500). This also gives the parent the time to create the other childs. Then nChilds are created and the number of childs for the next generation is decreased.

      Reproducer agent = new Reproducer(base.generateName());
      agent.nChilds = nChilds - 1;
      base.addKaaribogaOnCreation (agent, null);

Note that at the moment there is no security restriction on creating new agents.