Java Swing - 如何在JButton中设置标签和图标之间的间隙大小

import javax.swing.JButton;
import javax.swing.JOptionPane;
public class Main {
  public static void main(final String args[]) {
    JButton button = new JButton();

    // Get gap size; default is 4
    int gapSize = button.getIconTextGap();

    // Set gap size
    button.setIconTextGap(8);
    
    JOptionPane.showMessageDialog(null, button);
  }
}