在父JPanel中显示添加的JPanel [英] Make an added JPanel visible inside a parent JPanel

问题描述

如何在父 JPanel 中看到添加的 JPanel ？

How to make an added JPanel visible inside a parent JPanel?

我正在使用Netbeans来设计我的UI。

I am using Netbeans for designing my UI.

我有一个 MainFrame.java ，其中包含两个面板;即 headerPanel 和 bodyPanel 。

I have a MainFrame.java, which contains two panels; namely headerPanel and bodyPanel.

In headerPanel 我已经放了三个按钮，让它为 button1 ， button2 和 button3 。

In headerPanel I have put three buttons,let it be button1, button2 and button3.

此外，我创建了三个单独的文件，扩展 JPanel ，将其命名为 panel1 ， panel2 和 panel3 。

Also I have created three separate files extending JPanel, name it panel1, panel2 and panel3.

然后我在 MainFrame.java bodypanel 内的所有三个面板c $ c>在构造函数中。

Then I added all my three panels inside bodypanel in MainFrame.java in constructor.

bodyPanel.add(panel1);
bodyPanel.add(panel2);
bodyPanel.add(panel3);

我想点击相应的按钮，只有相应的面板应出现在 bodypanel 在大型机中，即如果我点击 button1 ，则应显示 panel1 。

I want that on clicking the respective buttons only respective panels should appear in the bodypanel in mainframe, i.e. if I click button1 then panel1 should be displayed.

我已经在 button1 鼠标监听器方法中尝试了以下代码：

I have already tried the following code in button1 mouse listener method:

bodyPanel.validate();
bodyPanel.getComponent(0).setVisible(true);

但 panel1 不会出现。我这样做是因为面板中添加的组件被分配了索引。所以首先我尝试获取组件然后使其可见。它不起作用。

But panel1 does not appear. I did it cause added components in a panel are allotted index. So first I tried to get the components and then make it visible. It did not work.

推荐答案

使用 CardLayout ，如图所示这里。

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