把字母表示的图状数据结构转换为树状数据结构.采用DefaultMutableTreeNode类的方式建立一个图状数据结构，顶点为字母A、B、C等，你也可以自己设计。可以帮助你把一个复杂的网状关系变成一个条理化的树状关系，并通过一个Tree显示出来。很不可思议吧？看看就知道了！-The chart-like data structures letters converted to tree data structure .Using DefaultMutableTreeNode class way to create a graph like data structure, the apex of the letters A, B, C, etc., you can also design their own. Can help you put a complex network of relationships into a coherent relationship between the tree and displayed by a Tree. Very weird, right? To see to know!