Petshop是一个宠物商店，是微软用来跟java的性能做对比的程序，有很好的架构，值得学习的好程序。运行程序前先安装PetShop3.rar中的安装文件。-Petshop is a pet shops, is used with Microsoft java comparing the performance of the procedure, have a good structure, we should learn from the program. Operating procedur