An error occurred while using the com. Sun. AWT. awtutilities class.

Solution ):

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"

Don't worry. It works.

Http://stackoverflow.com/questions/860187/access-restriction-on-class-due-to-restriction-on-required-library-rt-jar