问Java :如何在网格布局中更改一行的大小，并允许它只在水平而不是垂直方向动态调整大小？

EN

import java.awt.BorderLayout;
import java.awt.GridLayout;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.SwingUtilities;

public class TestLayout {

    protected void initUI() {
        final JFrame frame = new JFrame(TestLayout.class.getSimpleName());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JMenuBar menuBar = new JMenuBar();
        JMenu fileMenu = new JMenu("File");
        JMenuItem newItem = new JMenuItem("New...");
        JMenuItem open = new JMenuItem("Open...");
        fileMenu.add(newItem);
        fileMenu.add(open);
        menuBar.add(fileMenu);
        JTabbedPane tabs = new JTabbedPane();
        tabs.addTab("Tab 1", new JPanel());
        tabs.addTab("Tab 2", new JPanel());
        tabs.addTab("Tab 3", new JPanel());
        JPanel buttonPanel = new JPanel(new GridLayout());
        buttonPanel.add(new JButton("Button-1"));
        buttonPanel.add(new JButton("Button-2"));
        buttonPanel.add(new JButton("Button-3"));
        frame.add(tabs);
        frame.add(buttonPanel, BorderLayout.SOUTH);
        frame.setJMenuBar(menuBar);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new TestLayout().initUI();
            }
        });
    }
}