initial commit

lift/src/OnePersonRidesLift.java

@@ -0,0 +1,30 @@
+
+import lift.LiftView;
+import lift.Passenger;
+
+public class OnePersonRidesLift {
+
+    public static void main(String[] args) {
+
+        final int NBR_FLOORS = 7, MAX_PASSENGERS = 4;
+
+        LiftView  view = new LiftView(NBR_FLOORS, MAX_PASSENGERS);
+        Passenger pass = view.createPassenger();
+        int  fromFloor = pass.getStartFloor();
+        int    toFloor = pass.getDestinationFloor();
+
+        pass.begin();                        // walk in (from left)
+        if (fromFloor != 0) {
+            view.moveLift(0, fromFloor);
+        }
+        view.openDoors(fromFloor);
+        pass.enterLift();                    // step inside
+
+        view.closeDoors();
+        view.moveLift(fromFloor, toFloor);   // ride lift
+        view.openDoors(toFloor);
+
+        pass.exitLift();                     // leave lift
+        pass.end();                          // walk out (to the right)
+    }
+}

lift/src/lift/Passenger.java

@@ -0,0 +1,21 @@
+package lift;
+
+public interface Passenger {
+    /** @return the floor the passenger starts at */
+    int getStartFloor();
+
+    /** @return the floor the passenger is going to */
+    int getDestinationFloor();
+
+    /** First, delay for 0..45 seconds. Then animate the passenger's walk, on the entry floor, to the lift. */
+    void begin();
+
+    /** Animate the passenger's walk from the entry floor into the lift. */
+    void enterLift();
+
+    /** Animate the passenger's walk out of the lift, to the exit floor. */
+    void exitLift();
+
+    /** Animate the passenger's walk, on the exit floor, out of view. */
+    void end();
+}