question: private IJavaElement [ ] computeChildren ( ArrayList namesWithoutExtension ) { int size = namesWithoutExtension . size ( ) ; if ( size == 0 ) return NO_ELEMENTS ; IJavaElement [ ] children = new IJavaElement [ size ] ; for ( int i = 0 ; i < size ; i ++ ) { String nameWithoutExtension = ( String ) namesWithoutExtension . get ( i ) ; children [ i ] = new ClassFile ( this , manager , nameWithoutExtension ) ; } return children ; }
target:  Compute the children of this package fragment. Children of jar package fragments can only be IClassFile (representing .class files).