A small java

代码说明：

一个基于java的小游戏，名为SlidingPuzzle。类似于拼图，只不过是换成将打乱的1-15的数字按顺序重新排列成4*4矩阵形式。-A small java-based game called SlidingPuzzle. Similar to the puzzle, only to disrupt the 1-15 replaced by the number of re-arranged according to the order of 4* 4 matrix form.