将JPanel大小设置为以较小的边距填充父级 [英] Set the JPanel size to fill parent with little margin

问题描述

我有两个Jpanel（ JpanelLeft 和 JpanelLeftContent ）如何使JpanelLeftContent填充父级大小，左侧和右侧有一点边距。我尝试了不同的布局，并试图修改hgap和vgap值，但没有一个给我一个好的结果。

  JPanel JpanelLeft = new JPanel（）; 
 JPanel JpanelLeftContent = new JPanel（）; 
 JpanelLeft.add（JpanelLeftContent）; 
  

如果可能的话，我如何使JpanelLeftContent看起来像一个圆角矩形，如图所示。 / p>

解决方案

看一下 Border 的工作方式。特别是 BorderFactory.createEmptyBorder（int top，int left，int bottom，int right） 可能会有所帮助。

I have two Jpanel (JpanelLeft and JpanelLeftContent) how can i make the JpanelLeftContent fill parent size with a little margin on the left an right side. i have tried different layout and tried to modify the hgap and vgap values, but none of them give me a good result.

  JPanel JpanelLeft = new JPanel();
  JPanel JpanelLeftContent = new JPanel();
  JpanelLeft.add(JpanelLeftContent);

And if possible how can i make the JpanelLeftContent look like a rounded rectangle as shown in the picture.

解决方案

Take a look at how Borders work. Especially
BorderFactory.createEmptyBorder(int top, int left, int bottom, int right) might be helpfull.

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