Create a custom table in java

Create a custom table in java

I would like to create a table looking like this but with the titles
in-sync with the table:

Any tips on how make the columns being aligned with the rows and also
allow auto resize in x-axis? For this I used GridBagLayout. Also tried
with JTable but had problems to customize it to hide all default JTable
components(like in my picture).
public class MyTableExample extends JFrame {
public MyTableExample(){
JPanel contentPanel = new JPanel(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.weightx = 1;
c.fill = GridBagConstraints.HORIZONTAL;
contentPanel.add(getTitles(),c);
c.gridy = 2;
contentPanel.add(getRow(),c);
c.gridy = 3;
contentPanel.add(getRow(),c);
// MainPanel: Helps positioning the contentPanel
JPanel mainPanel = new JPanel(new GridBagLayout());
c.weighty = 1;
c.anchor = GridBagConstraints.NORTH;
c.insets = new Insets(20,20,20,20);
mainPanel.add(contentPanel,c);
this.add(mainPanel);
this.pack();
this.setVisible(true);
}
private JPanel getRow(){
JPanel rowPanel = new JPanel(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.weightx = 1;
c.weighty = 1;
c.fill = GridBagConstraints.HORIZONTAL;
c.anchor = GridBagConstraints.WEST;
rowPanel.setOpaque(false);
JLabel col1 = new JLabel("#rowItem");
JComboBox<String> col2 = new JComboBox<String>();
JButton col3 = new JButton("rowItem");
JLabel col4 = new JLabel("rowItem");
rowPanel.add(col1,c);
rowPanel.add(col2,c);
rowPanel.add(col3,c);
rowPanel.add(col4,c);
return rowPanel;
}
private JPanel getTitles(){
JPanel titlePanel = new JPanel(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.weightx = 1;
c.weighty = 1;
c.fill = GridBagConstraints.HORIZONTAL;
c.anchor = GridBagConstraints.WEST;
titlePanel.setOpaque(false);
JLabel t1 = new JLabel("T1");
JLabel t2 = new JLabel("Title2");
JLabel t3 = new JLabel("Title33333333");
JLabel t4 = new JLabel("T4");
titlePanel.add(t1,c);
titlePanel.add(t2,c);
titlePanel.add(t3,c);
titlePanel.add(t4,c);
return titlePanel;
}
public static void main(String[] args){
new MyTableExample();
}
}