用JPanel添加组件是正确的事情 [英] adding component with out JPanel is it right thing

问题描述

你好我有一个关于JPanel组件的问题，这是一个非常简单的问题，没有编码这个问题，如果我可以直接将它们直接添加到JFrame中，为什么我必须将gui组件添加到JPanel中，我总是必须添加所有组件给JPanel，如果我不这样做，那将在任何条件下影响该称谓

hello i had a question about JPanel component it is very simple question no coding the question why do i have to add gui component to the JPanel if i can simply adding them to the JFrame directly do i always have to add all the component to JPanel and if i did not do that is that going to effect the appellation in any term

推荐答案

您不必将内容添加到"JPanel"中，但是可以将它们直接添加到JFrame中，但是了解一些内容事情:

You don't have to add things to "the JPanel" but can add them directly to the JFrame, but understand a few things:

• 使用add(...)方法将组件添加到典型的JFrame时，实际上是将其添加到JFrame的contentPane中.
• ...这是 JPanel .
• 如果执行此操作，则需要了解Java布局管理器，以及将组件添加到使用BorderLayout的容器中的含义，例如JFrame contentPanes.
• 但是话虽如此，如果需要，您可以更改contentPane的布局管理器.

• When you add components to a typical JFrame using the add(...) method, you're actually adding it to the JFrame's contentPane...
• ... which is a JPanel.
• If you do this, you will need to understand Java Layout Managers, and what it means to add a component to a containers that use BorderLayout, such as JFrame contentPanes do.
• But having said that, you can change the layout manager of a contentPane if desired.

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