diff --git a/core/src/main/java/edu/umd/cs/piccolo/util/PDebug.java b/core/src/main/java/edu/umd/cs/piccolo/util/PDebug.java
index 20725c9..b86af98 100644
--- a/core/src/main/java/edu/umd/cs/piccolo/util/PDebug.java
+++ b/core/src/main/java/edu/umd/cs/piccolo/util/PDebug.java
@@ -157,7 +157,7 @@
 
         if (PDebug.debugRegionManagement) {
             final Graphics2D g2 = (Graphics2D) g;
-            g.setColor(PDebug.getDebugPaintColor());
+            g2.setColor(PDebug.getDebugPaintColor());
             g2.fill(g.getClipBounds().getBounds2D());
         }
 
diff --git a/core/src/main/java/edu/umd/cs/piccolo/util/PPaintContext.java b/core/src/main/java/edu/umd/cs/piccolo/util/PPaintContext.java
index 8a14e79..6c14804 100644
--- a/core/src/main/java/edu/umd/cs/piccolo/util/PPaintContext.java
+++ b/core/src/main/java/edu/umd/cs/piccolo/util/PPaintContext.java
@@ -242,7 +242,8 @@
     }
 
     /**
-     * Removes the topmost transparency if the given transparency is not opaque (1f).
+     * Removes the topmost transparency if the given transparency is not opaque
+     * (1f).
      * 
      * @param transparency transparency to be popped
      */
@@ -263,12 +264,12 @@
         if (transform == null) {
             return;
         }
-        
+
         final Rectangle2D newLocalClip = (Rectangle2D) getLocalClip().clone();
         transform.inverseTransform(newLocalClip, newLocalClip);
         transformStack.push(graphics.getTransform());
         localClipStack.push(newLocalClip);
-        graphics.transform(transform);        
+        graphics.transform(transform);
     }
 
     /**
@@ -321,6 +322,9 @@
                 graphics.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS,
                         RenderingHints.VALUE_FRACTIONALMETRICS_ON);
                 break;
+            default:
+                throw new RuntimeException(
+                        "Render Quality must be either PPaintContext.HIGH_QUALITY_RENDERING or PPaintContext.LOW_QUALITY_RENDERING");
         }
     }
 }
diff --git a/examples/src/main/java/edu/umd/cs/piccolo/examples/ShadowExample.java b/examples/src/main/java/edu/umd/cs/piccolo/examples/ShadowExample.java
index 6793ccd..ea8c59b 100755
--- a/examples/src/main/java/edu/umd/cs/piccolo/examples/ShadowExample.java
+++ b/examples/src/main/java/edu/umd/cs/piccolo/examples/ShadowExample.java
@@ -49,6 +49,7 @@
  */
 public final class ShadowExample extends PFrame {
 
+    private static final Color SHADOW_PAINT = new Color(20, 20, 20, 200);
     /** Default serial version UID. */
     private static final long serialVersionUID = 1L;
 
@@ -72,22 +73,16 @@
 
     /** {@inheritDoc} */
     public void initialize() {
-        BufferedImage src = new BufferedImage(75, 75, BufferedImage.TYPE_INT_ARGB);
-        Paint shadowPaint = new Color(20, 20, 20, 200);
-        Graphics2D g = src.createGraphics();
-        g.setPaint(Color.RED);
-        g.fillRect(0, 0, 75, 75);
-        g.dispose();
-
-        PText header1 = new PText("Shadow nodes drawn from an image, with increasing blur radius:");
-        getCanvas().getLayer().addChild(header1);
+        BufferedImage src = buildRedRectangleImage();    
+        
+        addHeaderAt("Shadow nodes drawn from an image, with increasing blur radius:", 0, 0);        
 
         double x = 25.0d;
         double y = 25.0d;
 
         for (int blurRadius = 4; blurRadius < 28; blurRadius += 4) {
             PImage node = new PImage(src);
-            PShadow shadowNode = new PShadow(src, shadowPaint, blurRadius);
+            PShadow shadowNode = new PShadow(src, SHADOW_PAINT, blurRadius);
 
             node.setOffset(x, y);
             // offset the shadow to account for blur radius offset and light direction
@@ -104,16 +99,11 @@
             }
         }
 
-        PText header2 = new PText("Shadow nodes drawn from node.toImage():");
-        header2.setOffset(0.0d, 300.0d);
-        getCanvas().getLayer().addChild(header2);
+        addHeaderAt("Shadow nodes drawn from node.toImage():", 0, 300);
 
-        PPath rectNode = PPath.createRectangle(0.0f, 0.0f, 75.0f, 75.0f);
-        rectNode.setPaint(Color.RED);
-        rectNode.setStroke(null);
-        rectNode.setOffset(25.0d, 325.0d);
+        PPath rectNode = buildRedRectangleNode();
 
-        PShadow rectShadow = new PShadow(rectNode.toImage(), shadowPaint, 8);
+        PShadow rectShadow = new PShadow(rectNode.toImage(), SHADOW_PAINT, 8);
         rectShadow.setOffset(25.0d - (2 * 8) + 5.0d, 325.0d - (2 * 8) + 5.0d);
 
         getCanvas().getLayer().addChild(rectShadow);
@@ -124,13 +114,39 @@
         textNode.setFont(textNode.getFont().deriveFont(36.0f));
         textNode.setOffset(125.0d, 325.0d);
 
-        PShadow textShadow = new PShadow(textNode.toImage(), shadowPaint, 8);
+        PShadow textShadow = new PShadow(textNode.toImage(), SHADOW_PAINT, 8);
         textShadow.setOffset(125.0d - (2 * 8) + 2.5d, 325.0d - (2 * 8) + 2.5d);
 
         getCanvas().getLayer().addChild(textShadow);
         getCanvas().getLayer().addChild(textNode);
     }
 
+    private PText addHeaderAt(String labelText, double x, double y) {
+        PText labelNode = new PText(labelText);
+        labelNode.setOffset(x, y);
+        getCanvas().getLayer().addChild(labelNode);
+        return labelNode;
+    }
+
+   
+
+    private BufferedImage buildRedRectangleImage() {
+        BufferedImage src = new BufferedImage(75, 75, BufferedImage.TYPE_INT_ARGB);
+        Graphics2D g = src.createGraphics();
+        g.setPaint(Color.RED);
+        g.fillRect(0, 0, 75, 75);
+        g.dispose();
+        return src;
+    }
+    
+    private PPath buildRedRectangleNode() {
+        PPath rectNode = PPath.createRectangle(0.0f, 0.0f, 75.0f, 75.0f);
+        rectNode.setPaint(Color.RED);
+        rectNode.setStroke(null);
+        rectNode.setOffset(25.0d, 325.0d);
+        return rectNode;
+    }
+
     /**
      * Main.
      *
diff --git a/extras/src/build/conf/checkstyle.xml b/extras/src/build/conf/checkstyle.xml
index c04e096..2a6f0a5 100644
--- a/extras/src/build/conf/checkstyle.xml
+++ b/extras/src/build/conf/checkstyle.xml
@@ -137,7 +137,10 @@
             
         
         
-        
+        
+        	
+        	        	        	
+        
         
         
         
diff --git a/extras/src/main/java/edu/umd/cs/piccolox/PFrame.java b/extras/src/main/java/edu/umd/cs/piccolox/PFrame.java
index 690572d..b344631 100644
--- a/extras/src/main/java/edu/umd/cs/piccolox/PFrame.java
+++ b/extras/src/main/java/edu/umd/cs/piccolox/PFrame.java
@@ -83,8 +83,8 @@
      * @param fullScreenMode whether to display a full screen frame or not
      * @param canvas to embed in the frame
      */
-    public PFrame(final String title, final boolean fullScreenMode, final PCanvas aCanvas) {
-        this(title, GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice(), fullScreenMode, aCanvas);
+    public PFrame(final String title, final boolean fullScreenMode, final PCanvas canvas) {
+        this(title, GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice(), fullScreenMode, canvas);
     }
 
     /**
@@ -97,7 +97,7 @@
      * @param canvas to embed in the frame, may be null. If so, it'll create a
      *            default PCanvas
      */
-    public PFrame(final String title, final GraphicsDevice aDevice, final boolean fullScreenMode, final PCanvas aCanvas) {
+    public PFrame(final String title, final GraphicsDevice aDevice, final boolean fullScreenMode, final PCanvas canvas) {
         super(title, aDevice.getDefaultConfiguration());
 
         graphicsDevice = aDevice;
@@ -113,11 +113,11 @@
             System.out.println("Ignoring security exception. Assuming Applet Context.");
         }
 
-        if (aCanvas == null) {
-            canvas = new PCanvas();
+        if (canvas == null) {
+            this.canvas = new PCanvas();
         }
         else {
-            canvas = aCanvas;
+            this.canvas = canvas;
         }
 
         setContentPane(canvas);
@@ -214,6 +214,13 @@
         setVisible(true);
     }
 
+    /**
+     * Sets the display mode to the best device mode that can be determined.
+     * 
+     * Used in full screen mode.
+     * 
+     * @param device The graphics device being controlled.
+     */
     protected void chooseBestDisplayMode(final GraphicsDevice device) {
         final DisplayMode best = getBestDisplayMode(device);
         if (best != null) {
@@ -221,6 +228,14 @@
         }
     }
 
+    /**
+     * Finds the best display mode the graphics device supports. Based on the
+     * preferred modes.
+     * 
+     * @param device the device being inspected
+     * 
+     * @return best display mode the given device supports
+     */
     protected DisplayMode getBestDisplayMode(final GraphicsDevice device) {
         final Iterator itr = getPreferredDisplayModes(device).iterator();
         while (itr.hasNext()) {
@@ -240,6 +255,9 @@
     /**
      * By default return the current display mode. Subclasses may override this
      * method to return other modes in the collection.
+     * 
+     * @param device the device being inspected
+     * @return preferred display mode
      */
     protected Collection getPreferredDisplayModes(final GraphicsDevice device) {
         final ArrayList result = new ArrayList();
diff --git a/swt/src/build/conf/checkstyle.xml b/swt/src/build/conf/checkstyle.xml
index 4851327..6d38113 100644
--- a/swt/src/build/conf/checkstyle.xml
+++ b/swt/src/build/conf/checkstyle.xml
@@ -137,7 +137,10 @@
             
         
         
-        
+        
+        	
+        	        	        	
+