如何计算CardLayout中的卡数

Question

I have a JPanel which uses a CardLayout to have a number of pages, and to make a progress bar that fills up as pages are defined, I would like to count the number of cards added to my CardLayout . Is there a way of counting cards programatically, or will I have to track the number of pages with a variable?

Answer 1

由于卡是JPanel保留的唯一组件，因此getComponentCount()实际上返回页面数。