Added presentations from EVI 2017

EVI - 2017/EVI 12/Examples/Behavior.java

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+package lejos.robotics.subsumption;
+
+
+/**
+* The Behavior interface represents an object embodying a specific
+* behavior belonging to a robot. Each behavior must define three things: <BR>
+* 1) The circumstances to make this behavior seize control of the robot.
+* e.g. When the touch sensor determines the robot has collided with an object.<BR>
+* 2) The action to perform when this behavior takes control. 
+* e.g. Back up and turn.<BR>
+* 3) A way to quickly exit from the action when the Arbitrator selects  a higher
+ * priority behavior to take control.
+* These are represented by defining the methods takeControl(), action(),
+* and suppress() respectively. <BR>
+* A behavior control system has one or more Behavior objects. When you have defined
+* these objects, create an array of them and use that array to initialize an
+* Arbitrator object.
+*
+* @see Arbitrator
+  
+* @version 0.9  May 2011
+*/
+public interface Behavior {
+   
+   /**
+   * The boolean return  indicates  if this behavior should seize control of the robot.
+   * For example, a robot that reacts if a touch sensor is pressed: <BR>
+   * public boolean takeControl() { <BR>
+   *    return touch.isPressed(); <BR>
+   * } <BR>
+   * @return boolean  Indicates if this Behavior should seize control.
+   */
+   public boolean takeControl();
+   
+   /**
+   * The code in action() represents the tasks  the robot performs when this
+   * behavior becomes active. It can be as complex as navigating around a
+   * room, or as simple as playing a tune.<BR>
+   * <B>The contract for implementing this method is:</B><BR>
+   *  If its task is  is complete, the method returns.
+    * It also  <B> must </B> return promptly when the suppress() method
+    * is called, for example by testing the boolean suppress flag.  <br>
+    * When this method exits, the robot is in a safe state for another behavior
+    * to run its action() method
+   */
+   public void action();
+   
+   /**
+   * The code in suppress() should cause the current behavior to exit. <BR>
+   * <B>The contract for implementing this method is:</B><BR>
+   *  Exit  quickly, for example, just set boolean flag.
+   */
+   public void suppress();
+   
+}