8043151: KSS: javax.swing.plaf.nimbus.AbstractRegionPainter#getComponentColor

Reviewed-by: alexsch, serb

src/share/classes/javax/swing/plaf/nimbus/AbstractRegionPainter.java

@@ -31,6 +31,7 @@ import javax.swing.*;
 import javax.swing.plaf.UIResource;
 import javax.swing.Painter;
 import java.awt.print.PrinterGraphics;
+import sun.reflect.misc.MethodUtil;
 
 /**
  * Convenient base class for defining Painter instances for rendering a
@@ -445,8 +446,8 @@ public abstract class AbstractRegionPainter implements Painter<JComponent> {
             } else {
                 String s = "get" + Character.toUpperCase(property.charAt(0)) + property.substring(1);
                 try {
-                    Method method = c.getClass().getMethod(s);
-                    color = (Color) method.invoke(c);
+                    Method method = MethodUtil.getMethod(c.getClass(), s, null);
+                    color = (Color) MethodUtil.invoke(method, c, null);
                 } catch (Exception e) {
                     //don't do anything, it just didn't work, that's all.
                     //This could be a normal occurance if you use a property