在左下角/右下角创建两个按钮

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);

我试图将按钮 1 放在左下角，将按钮 2 放在右下角

__________________________
|                        | 
|                        |
|                        |
|                        |
|                        |
|                        |
|Button1         Button2 |
|________________________|

您可能需要考虑使用BoxLayout http://docs.oracle.com/javase/tutorial/uiswing/layout/box.html's horizontalGlue http://docs.oracle.com/javase/tutorial/uiswing/layout/box.html#filler:

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);
    }
}

在调整大小之前和之后，这可能会给你带来这样的结果：