带界面的简洁的仿拼图程序。4*4的表格，内部为按钮，有一个为空白按钮，其余标记1-15的随机数字。点击空白按钮相邻的按钮则可以移动按钮位置，否则为非法移动。重复移动过程，最终将按钮上的数字按顺序排列。 -Simple interface with imitation mosaic process. 4* 4 forms, internal to the button, there is a blank button, and the other labeled random number 1-15. Click the blank button next to the button you can move the button location, otherwise illegal move. Repeat the move, eventually the number of buttons in sequence.