Question

JButton button1 = new JButton("Button 1");
JButton button2 = new JButton("Button 2");
JFrame frame = new JFrame();
frame.getContentPane().setLayout(new BorderLayout());
button2.setLayout(new FlowLayout(FlowLayout.RIGHT));
button1.setLayout(new FlowLayout(FlowLayout.LEFT));
frame.getContentPane().add(button1,BorderLayout.SOUTH);
frame.getContentPane().add(button2,BorderLayout.SOUTH);
frame.setSize(500,500);
frame.setVisible(true);

我试图在左下角制作按钮1，在右下角制作按钮2

__________________________
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|Button1         Button2 |
|________________________|

Answer 1

您可能需要考虑使用BoxLayout＆＃39; horizontalGlue：

import java.awt.BorderLayout;

import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class ButtonsLeftAndRight {
    private JFrame frame;
    private JPanel pane;
    private JButton button1;
    private JButton button2;

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new ButtonsLeftAndRight()::createAndShowGui);
    }

    public void createAndShowGui() {
        frame = new JFrame(getClass().getSimpleName());

        pane = new JPanel();
        pane.setLayout(new BoxLayout(pane, BoxLayout.LINE_AXIS));

        button1 = new JButton("Button1");
        button2 = new JButton("Button2");

        pane.add(button1);
        pane.add(Box.createHorizontalGlue());
        pane.add(button2);

        frame.add(pane, BorderLayout.SOUTH);

        frame.pack();
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

这可能会在调整大小之前和之后得到这个：

Answer 2

为两者创建一个容器。

JPanel south = new JPanel(new AxisLayout(AxisLayout.HORIZONTAL));
south.add(button1);
south.add(button2);
frame.getContentPane().add(south, BorderLayout.SOUTH);

Obs：抱歉不记得Swing布局管理员，但你会发现AxisLayout来解决这个问题

Answer 3

另一种方法是使用GUI构建器，并相应地修改代码。

JButton button1 = new JButton("Button 1");
        JButton button2 = new JButton("Button 2");
        JFrame frame = new JFrame();
        GroupLayout layout = new GroupLayout(frame.getContentPane());
        frame.getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
                layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                        .addGap(25, 25, 25)
                        .addComponent(button1)
                        .addPreferredGap(LayoutStyle.ComponentPlacement.RELATED, 215, Short.MAX_VALUE)
                        .addComponent(button2)
                        .addContainerGap())
        );
        layout.setVerticalGroup(
                layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                        .addContainerGap(256, Short.MAX_VALUE)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                                .addComponent(button1)
                                .addComponent(button2))
                        .addGap(25, 25, 25))
        );
        frame.setSize(500, 500);
        frame.setVisible(true);

Answer 4

您可以添加jPanel，然后将两个按钮添加到其中，然后在按钮上调用setBounds并指定位置。然后将jPanel添加到jFrame。

JButton button1 = new JButton("Button 1");
        JButton button2 = new JButton("Button 2");
        JFrame frame = new JFrame();
        JPanel p = new JPanel();
        p.setLayout(null);
        button1.setBounds(10, 400, 100, 40);
        p.add(button1);
        button2.setBounds(375, 400, 100, 40);
        p.add(button2);
        frame.getContentPane().add(p);
        frame.setSize(500, 500);
        frame.setVisible(true);

边界设置为（x-coord，y-coord，width，height）。

在左下角/右下角创建两个按钮

4 个答案: