基于Java的树型下拉列表框的实现

Implementation of Tree Shaped Pull down Listing Frame Based on Java

下拉列表框在程序设计中使用非常普遍。通过对常规下拉列表的改造,扩展了下拉列表框的功能,使其能够显示树型的下拉列表内容。

Pull down listing frame is often used in grogram design.By means of innovation for conventional pull down listing,its function is expanded,which makes it can display the contents of tree shaped pull down listing.