使用Java编写的用深度优先算法解决8数码问题的源码，八数码也叫九宫格问题，在使用算法前使用逆序数判断，自己写的，直接可以运行-Written in Java using depth-first algorithm source code, to solve the problem of 8 digital 8 digital also called scratchable latex, judge before using algorithm using reverse number, wri