The type AWTUtilities is not accessible due to restriction on required library D:\Program Files\jdk1.6.0_24\jre\lib\rt.jar”，
Access restriction: The type WindowsLookAndFeel is not accessible due to restriction on required library
解决的方法:在project build path中先移除JRE System Library，再添加库JRE System Library即可
http://blog.csdn.net/gavin_john/article/details/9158197
http://mocha-c-163-com.iteye.com/blog/852973
