我有一个JPanel添加了绝对位置的组件（即“pos x y”），并且布局实际上是两列文本字段。我想要实现的是Tab将焦点垂直转移到下一个组件，以便遍历第一列，然后是第二列。目前它是水平的。我试图扩展FocusTraversalPolicy，但让我恼火的是你必须将它添加到JFrame而不只是面板本身 - 除非这是不正确的？
我怎样才能做到这一点？谢谢。
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As far as I know the default focus traversal cycle is the natural order of the childcomponents in a container, i.e. the order in which they were added to the container. I don't know MigLayout very well, but if you manage to add the components vertically, the focus traversal might follow.
You can set a FocusTraversalPolicy to any Container, however, Swing will only use it when you call setFocusTraversalPolicyProvider(true) on the same Container.
于 2012-05-14T07:40:07.160 回答