1 files changed, 46 insertions, 0 deletions
diff --git a/docs/examples/observer/Display.java b/docs/examples/observer/Display.java
new file mode 100644
index 000000000..67ed2cb5b
--- /dev/null
+++ b/docs/examples/observer/Display.java
@@ -0,0 +1,46 @@
+/*
+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.
+*/
+
+package observer;
+import java.awt.Frame;
+import java.awt.Panel;
+import java.awt.Container;
+import java.awt.Component;
+import java.awt.event.WindowAdapter;
+import java.awt.event.WindowEvent;
+import java.awt.BorderLayout;
+
+/*
+ * Display is the container class that holds all the views of the
+ * colored number.
+ * In this demo, it holds buttons.
+ */
+
+class Display extends Panel {
+
+    protected Frame frame = new Frame("Subject/Observer Demo");
+
+    Display() {
+        frame.addWindowListener(new WindowAdapter() {
+                public void windowClosing(WindowEvent e) {System.exit(0);}
+            });
+
+        frame.add(this, BorderLayout.CENTER);
+        frame.pack();
+        frame.setVisible(true);
+    }
+
+    void addToFrame(Component c) {
+        add(c);
+        frame.pack();
+    }
+}