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Http://www.oracle.com/technnetwork/java/javase/downloads/jdk8-downloads-2133151.html2. Code: cry; A whine; Cry.三人跟着脚印，发现很多奇诡的事情，鞋印居然飞上三米高的墙头。一跃三米高，这是什么人？脚印居然跃过七米远的沟壑，闽玥越发觉得诡异。三人费尽心血奔波，跟着脚印走到一个小山谷，三人，一只大雁正挣扎着啄开脚上的大鞋子。三人明白自己被耍了。211. X.X.43One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code.(2) Connect your iPhone to your computer; If your computer does not have iTunes, please download and install it on your website.若是放他走也不会闹起什么风浪，相信熊心现在也明白自己的处境，不会那么不识相。