gridbaglayoutのsize要素を変更できません - java、layout

の幅を設定したい jbutton そして jdate chooser = 2 セルイン gridbaglayout。使ってみる weightx, weighty, gridwidth, gridweight 私のコードでサイズを設定する jbutton そして jdatechooser でもできます」

これは jateatechooser としょうかん。

そして、この私のコード：

import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.Toolkit;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTable;

import com.toedter.calendar.JDateChooser;

public class SearchRoomFrm extends JFrame {

final private String[] listTypeRoom = { "thường", "hạng trung", "VIP" };

private JDateChooser txtStartDate;
private JDateChooser txtEndDate;
private JComboBox cbTypeRoom;
private JButton btnSearchRoom;
private JTable tbRoom;
private JButton btnXong;

public SearchRoomFrm() {
super("Search Room");
txtStartDate = new JDateChooser();
txtEndDate = new JDateChooser();
cbTypeRoom = new JComboBox(listTypeRoom);
btnSearchRoom = new JButton("Search");
tbRoom = new JTable();
btnXong = new JButton("Xong");

JPanel content = new JPanel();
content.setLayout(new GridBagLayout());

GridBagConstraints c = new GridBagConstraints();
c.fill = GridBagConstraints.BOTH;
c.insets = new Insets(5, 5, 5, 5);

// Row 1
c.gridx = 0;
c.gridy = 0;
content.add(new JLabel("Start date: "), c);

c.gridx = 1;
content.add(txtStartDate, c);

c.gridx = 2;
content.add(btnSearchRoom, c);

// Row 2
c.gridx = 0;
c.gridy = 1;
content.add(new JLabel("End date: "), c);

c.gridx = 1;
content.add(txtEndDate, c);

// Row 3
c.gridx = 0;
c.gridy = 2;
content.add(new JLabel("Type room: "), c);

c.gridx = 1;
content.add(cbTypeRoom, c);

// Row 4
c.gridx = 3;
c.gridy = 3;
content.add(tbRoom, c);

this.setContentPane(content);
this.pack();
Dimension dimension = Toolkit.getDefaultToolkit().getScreenSize();
int x = (int) ((dimension.getWidth() - this.getWidth()) / 2);
int y = (int) ((dimension.getHeight() - this.getHeight()) / 2);
this.setLocation(x, y);

}

public static void main(String[] args) {
SearchRoomFrm frm = new SearchRoomFrm();
frm.setVisible(true);
}
}

回答：

どういう意味ですか？

これはのような何かを使って達成されます...

c.gridx = 2;
c.gridheight = 2;
content.add(btnSearchRoom, c);
c.gridheight = 1;