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实际上,我正在创建一个面板A并包括文本字段和列表框,然后创建另一个面板B并将A面板插入到B. 现在我必须输入一些文本字段,但下面的列表框在该B面板中不可见。
A
B
如何在下面的文本字段控件上显示列表框?
我的猜测是您正在混合重质和轻质成分。阅读:http: //java.sun.com/products/jfc/tsc/articles/mixing/