[Eranga]

You have to think about both horizontal as well as vertical alignments in the layout.

Code:

import javax.swing.*;
import static javax.swing.GroupLayout.Alignment.*;
/**
 *
 * @author Eranga Tennakoon
 */
public class GroupLayoutTest extends JFrame{

    public GroupLayoutTest() {
        JLabel name = new JLabel("Name");
        JLabel age = new JLabel("Age");
        JTextField tf = new JTextField(20);
        JTextField tf1 = new JTextField(20);
        
        GroupLayout layout = new GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setAutoCreateGaps(true);
        layout.setAutoCreateContainerGaps(true);
        
        layout.setHorizontalGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(LEADING)
                    .addComponent(name)
                    .addComponent(age))
                .addGroup(layout.createParallelGroup(LEADING)
                    .addComponent(tf)
                    .addComponent(tf1))
                );
        
        layout.setVerticalGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(BASELINE)
                    .addComponent(name)
                    .addComponent(tf))
                .addGroup(layout.createParallelGroup(LEADING)
                    .addComponent(age)
                    .addComponent(tf1))
                );
     
        setTitle("GroupLayout");
        pack();
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        // TODO code application logic here
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new GroupLayoutTest().setVisible(true);
            }
        });
    }
    

}