如何将JScrollPane添加到JPanel [英] How does one add a JScrollPane to a JPanel

问题描述

我一直在寻找实现JScrollPlane的简单方法.我正在尝试将其添加到JPanel，它将包含动态数量的JPanel s(将填充其他内容).

I have been searching around for an easy way to implement a JScrollPlane. I am trying to add it to a JPanel, and it will contain a dynamic number of JPanels (which will be filled with other stuff).

这是我(失败的)尝试做出所说的JScrollPane:

Here is my (failing miserably) attempt to make said JScrollPane:

final JPanel info = new JPanel();
final JScrollPane infoS = new JScrollPane(info,ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
info.setLayout(new GridLayout(0,1));
info.setLocation(10,78);
info.setSize(420,490);
infoS.setPreferredSize(new Dimension(600, 600));
gui.add(infoS);

推荐答案

您遇到的主要问题是默认布局管理器的布局设置为FlowLayout，这意味着JScrollPane将要使用它的首选尺寸进行布局，这样可能无法填满整个面板.

The primary problem you're having is the fact that the default layout manager's layout is set to FlowLayout, which means that the JScrollPane will want to use it's preferred size to be layout with, which may not fill the entire panel.

相反，请使用BorderLayout

final JPanel info = new JPanel(new BorderLayout()); // <-- Change me :D
final JScrollPane infoS = new JScrollPane(info,ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);
// These are bad ideas, setLocation and setSize won't work, as the panel should be
// under the control of a layout manager
//info.setLocation(10,78);
//info.setSize(420,490);
//infoS.setPreferredSize(new Dimension(600, 600));
gui.add(infoS);

这篇关于如何将JScrollPane添加到JPanel的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！