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diff --git a/docs/modules/ROOT/examples/spacewar/EnergyPacketProducer.java b/docs/modules/ROOT/examples/spacewar/EnergyPacketProducer.java
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+++ b/docs/modules/ROOT/examples/spacewar/EnergyPacketProducer.java
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+/*
+
+Copyright (c) Xerox Corporation 1998-2002.  All rights reserved.
+
+Use and copying of this software and preparation of derivative works based
+upon this software are permitted.  Any distribution of this software or
+derivative works must comply with all applicable United States export control
+laws.
+
+This software is made available AS IS, and Xerox Corporation makes no warranty
+about the software, its performance or its conformity to any specification.
+
+|<---            this code is formatted to fit into 80 columns             --->|
+|<---            this code is formatted to fit into 80 columns             --->|
+|<---            this code is formatted to fit into 80 columns             --->|
+
+
+EnergyPacketProducer.java
+Part of the Spacewar system.
+
+ This implementation creates booby-trapped packets 20% of the time.
+
+*/
+
+package spacewar;
+
+
+class EnergyPacketProducer extends Thread {
+    private final static int MIN = -20;
+    private final static int MAX = 80;
+    private final static int EXPECTEDINTERVAL = 15;
+
+    private Game game;
+
+    Game getGame() { return game; }
+
+    EnergyPacketProducer(Game theGame) {
+        super("EnergyPacketProducer");
+        game = theGame;
+    }
+
+    public void run() {
+        while(true) {
+            produceAPacket();
+            waitForABit();
+        }
+    }
+
+    void waitForABit() {
+        try { Thread.sleep((int)(Math.random() * EXPECTEDINTERVAL * 2000)); }
+        catch (InterruptedException e) {}
+    }
+
+    void produceAPacket() {
+        EnergyPacket pkt =
+            new EnergyPacket(game,
+                             Math.random() * getGame().getWidth(),
+                             Math.random() * getGame().getHeight(),
+                             Math.random() * 2 - 1,
+                             Math.random() * 2 - 1,
+                             Math.random() * (MAX - MIN) + MIN);
+    }
+}