--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/demo/share/jfc/J2Ddemo/java2d/ControlsSurface.java	Mon May 14 08:58:32 2018 -0700
@@ -0,0 +1,82 @@
+/*
+ *
+ * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *   - Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *
+ *   - Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ *   - Neither the name of Oracle nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+package java2d;
+
+
+import static java2d.CustomControlsContext.State.START;
+import java.awt.Component;
+
+
+/**
+ * The class to utilize custom controls for a Demo.
+ */
+@SuppressWarnings("serial")
+public abstract class ControlsSurface extends Surface implements CustomControlsContext {
+
+    @Override
+    public void setControls(Component[] controls) {
+        this.controls = controls;
+    }
+
+    @Override
+    public void setConstraints(String[] constraints) {
+        this.constraints = constraints;
+    }
+
+    @Override
+    public String[] getConstraints() {
+        return constraints;
+    }
+
+    @Override
+    public Component[] getControls() {
+        return controls;
+    }
+
+    @Override
+    public void handleThread(CustomControlsContext.State state) {
+        for (Component control : controls) {
+            if (control instanceof CustomControls) {
+                if (state == START) {
+                    ((CustomControls) control).start();
+                } else {
+                    ((CustomControls) control).stop();
+                }
+            }
+        }
+    }
+
+    private Component[] controls;
+    private String[] constraints = { java.awt.BorderLayout.NORTH };
+}