java.net.URL

is imported to:

.   bluej
.   bluej.classmgr
.   bluej.debugger
.   bluej.debugger.jdi
.   bluej.editor.moe
.   bluej.extensions
.   bluej.extmgr
.   bluej.parser
.   bluej.pkgmgr
.   bluej.runtime
.   bluej.utility
.   greenfoot
.   greenfoot.core
.   greenfoot.extension
.   greenfoot.guifx
.   greenfoot.platforms
.   greenfoot.platforms.ide
.   greenfoot.platforms.standalone
.   greenfoot.sound
.   greenfoot.util