在Eclipse中设置如下就可以了：
When using com.sun.awt.AWTUtilities, Eclipse gives a error:
- Access restriction: The method
setWindowOpacity(Window, float) from the type AWTUtilities is not accessible due
to restriction on requiredlibrary C:\Program Files\Java\jre6\lib\rt.jar
-
Access restriction: The type AWTUtilities is not accessible due to restriction
on required library C:\Program Files\Java\jre6\lib\rt.jar
You can fix it like this:
Preferences -> Java -> Compiler -> Errors/Warnings -> Deprecated and restricted API ->
Forbidden reference -> change "error" to "warning"
JAVA中引用com.sun.awt.AWTUtilities时报错,布布扣,bubuko.com
JAVA中引用com.sun.awt.AWTUtilities时报错
原文：http://www.cnblogs.com/oneztec/p/3772956.html