java 设置 JPanel 布局
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Setting JPanel layout
提问by Sumudu
(Say) I've created a JPanel with three buttons. I want to place the buttons as follows (I've done this using netbeans GUI editor. But I need to write the whole GUI manually).
（说）我创建了一个带有三个按钮的 JPanel。我想按如下方式放置按钮（我已经使用 netbeans GUI 编辑器完成了此操作。但我需要手动编写整个 GUI）。
Can some one show me a way to achieve this.
有人可以告诉我一种方法来实现这一目标。
(In words, I need to place some buttons right aligned, some other left aligned.)
（换句话说，我需要将一些按钮右对齐，其他一些左对齐。）
回答by aioobe
I guess you want the Configurebutton to be as far to the left as possible, and the okand cancelgrouped together to the right. If so, I would suggest using a BorderLayoutand place the Configurebutton in WEST, and a flow-layout for Ok, Canceland place that panel in the EAST.
我猜您希望“配置”按钮尽可能靠左，而“确定”和“取消”组合在右侧。如果是这样，我建议使用 aBorderLayout并将配置按钮放置在 WEST 中，并使用流布局Ok，Cancel并将该面板放置在 EAST 中。
Another option would be to use GridBagLayoutand make use of the GridBagConstrant.anchorattribute.
另一种选择是使用GridBagLayout和利用该GridBagConstrant.anchor属性。
Since you're taking the time to avoid the NetBeans GUI editor, here's a nice example for you :-)
由于您正在花时间避免使用 NetBeans GUI 编辑器，因此这里有一个很好的示例：-)
Code below:
代码如下：
import java.awt.BorderLayout;
import javax.swing.*;
public class FrameTestBase {
public static void main(String args[]) {
// Will be left-aligned.
JPanel configurePanel = new JPanel();
configurePanel.add(new JButton("Configure"));
// Will be right-aligned.
JPanel okCancelPanel = new JPanel();
okCancelPanel.add(new JButton("Ok"));
okCancelPanel.add(new JButton("Cancel"));
// The full panel.
JPanel buttonPanel = new JPanel(new BorderLayout());
buttonPanel.add(configurePanel, BorderLayout.WEST);
buttonPanel.add(okCancelPanel, BorderLayout.EAST);
// Show it.
JFrame t = new JFrame("Button Layout Demo");
t.setContentPane(buttonPanel);
t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
t.setSize(400, 65);
t.setVisible(true);
}
}
