可以使用布局管理器（例如GridBagLayout）来保持命令按钮在界面上的位置相对不变。以下是一个简单的示例代码，其中包含三个按钮，它们在GridBagLayout中被定位并保持在相对位置不变：

import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import javax.swing.JButton;
import javax.swing.JFrame;

public class ButtonPositionExample {
   public static void main(String[] args) {
      JFrame frame = new JFrame("Button Position Example");
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      // 创建GridBagLayout
      GridBagLayout layout = new GridBagLayout();
      frame.setLayout(layout);

      // 创建三个按钮并定位它们
      JButton button1 = new JButton("Button 1");
      GridBagConstraints gbc = new GridBagConstraints();
      gbc.gridx = 0;
      gbc.gridy = 0;
      layout.setConstraints(button1, gbc);

      JButton button2 = new JButton("Button 2");
      gbc = new GridBagConstraints();
      gbc.gridx = 0;
      gbc.gridy = 1;
      layout.setConstraints(button2, gbc);

      JButton button3 = new JButton("Button 3");
      gbc = new GridBagConstraints();
      gbc.gridx = 1;
      gbc.gridy = 0;
      layout.setConstraints(button3, gbc);

      // 添加按钮到窗口中
      frame.add(button1);
      frame.add(button2);
      frame.add(button3);

      frame.pack();
      frame.setVisible(true);
   }
}