This book constitutes the refereed proceedings of the 23rd european conference on object oriented programming ecoop 2009 held in genoa italy in july 2009 the 25 revised full papers presented together with the abstracts of 2 invited talks and the ecoop 2008 banquet speech were carefully reviewed and selected from a total of 117 submissions. Ecoop 2009 object oriented programming 23rd european conference genoa italy july 6 10 2009 proceedings lecture notes in computer science sophia drossopoulou on amazoncom free shipping on qualifying offers welcome to the proceedings of ecoop 2009. Arthur hailey ecoop 2009 object oriented programming 23rd european conference genoa italy july 6 10 2009 proceedings lecture notes in computer science sophia drossopoulou on amazoncom free shipping on qualifying offers welcome to the proceedings of ecoop 2009 this book constitutes the refereed proceedings of the 23rd. Ecoop 2009 object oriented programming 23rd european conference genoa italy july 6 10 2009 proceedings