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如何以编程方式调整BorderLayout中的组件的大小？

[英]How do I programatically resize a component in a BorderLayout?

原文 2012-05-22 10:01:10 8 1 java/ swing/ layout-manager/ border-layout

I have a JPanel that is located at the BorderLayout.SOUTH position of a parent JPanel. 我有一个JPanel，位于父JPanel的BorderLayout.SOUTH位置。 I would like to programatically change the height of this child JPanel. 我想以编程方式改变这个孩子JPanel的高度。

I am calling childPanel.setPreferredSize(new Dimension(getWidth(), newHeight)); 我正在调用childPanel.setPreferredSize(new Dimension(getWidth(), newHeight)); , but it has no effect. ，但它没有效果。 (I have tried setting the Maximum and Minimum sizes as well.) （我也尝试过设置最大和最小尺寸。）

What (probably very simple thing) am I missing? 我错过了什么（可能非常简单的事情）？

1 个解决方案

After changing the preferred size, you need to call revalidate() on that childPanel. 更改首选大小后，您需要在该childPanel上调用revalidate（）。

You may want to read this Oracle Tutorial on LayoutManagers 您可能希望阅读有关LayoutManagers的Oracle Tutorial

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