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Java Swing - 如何垂直对齐BorderLayout.CENTER上的GridBagLayout面板...

layout 【layout】
我们想知道如何垂直对齐BorderLayout.CENTER上的GridBagLayout面板。...
代码展示 运行结果 
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;

import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class Main extends JFrame {

  public Main() {
    setPreferredSize(new Dimension(500, 500));
    getContentPane().setLayout(new BorderLayout());
    JPanel panel = new JPanel(new GridBagLayout());

    GridBagConstraints c = new GridBagConstraints();
    c.insets = new Insets(4, 4, 4, 4);
    panel.add(new JLabel("Label"), c);

    panel.add(new JTextField(20), c);

    c.gridwidth = GridBagConstraints.REMAINDER;
    panel.add(new JButton("btn"), c);
    c.gridwidth = 1;

    panel.add(new JLabel("Name"), c);

    panel.add(new JTextField(20), c);

    c.gridwidth = GridBagConstraints.REMAINDER;
    panel.add(new JButton("btn"), c);
    c.weighty = 1.0;
    panel.add(Box.createGlue(), c);

    add(panel, BorderLayout.LINE_START);

    pack();
    setVisible(true);
  }

  public static void main(String[] args) {
    new Main();
  }
}