Java 向 JPanel 添加额外的 JPanel
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/913139/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Adding additional JPanels to a JPanel
提问by Peter C.
Rather basic question here guys.
相当基本的问题，伙计们。
Basically I have code like this:
基本上我有这样的代码：
public SuperPanel() {
setLayout(new BorderLayout());
add(panel1(), BorderLayout.NORTH);
add(panel2(), BorderLayout.CENTER);
add(panel3(), BorderLayout.SOUTH);
}
And that all works well and good. The problem is that I have another part I wish to add to the center. Just using add(newPanel(), BorderLayout.CENTER)doesn't work, obviously. But you can add JPanels in JPanels, correct?
这一切都很好。问题是我还有另一部分要添加到中心。add(newPanel(), BorderLayout.CENTER)显然，仅仅使用是行不通的。但是您可以在JPanels 中添加JPanels，对吗？
So I made the following change:
所以我做了以下改动：
public SuperPanel() {
setLayout(new BorderLayout());
add(panel1(), BorderLayout.NORTH);
add(supersweetpanel(), BorderLayout.CENTER);
add(panel3(), BorderLayout.SOUTH);
}
With supersweetpanel()being:
随着supersweetpanel()：
public JPanel supersweetpanel() {
JPanel sswp = new JPanel();
setLayout(new BorderLayout());
add(panel2(), BorderLayout.NORTH);
return sswp;
}
Now it overrides panel1! If I set it to anything else (CENTER, SOUTH, what have you), the first two panels disappear entirely. Help is much appreciated.
现在它覆盖了panel1！如果我将其设置为其他任何内容（CENTER, SOUTH，你有什么），前两个面板将完全消失。非常感谢帮助。
采纳答案by Michael Myers
SuperPanelis likely a subclass of JPanel, right? You are accidentally adding panel2to this(the SuperPanel), not sswp. Try:
SuperPanel很可能是 的子类JPanel，对吗？您不小心添加panel2到this(the SuperPanel)，而不是sswp. 尝试：
public JPanel supersweetpanel() {
JPanel sswp = new JPanel();
sswp.setLayout(new BorderLayout());
sswp.add(panel2(), BorderLayout.NORTH);
return sswp;
}
