How to improve the margin and padding of JPanel?

When I initially run my Java Swing application, the padding and margining of the JLabel and JTextField components in a JPanel look good. But whenever I resize the application, the padding and margining for the labels and text fields increases so much that it does not look as good.

I understand a GridLayout has a set amount of vertical and horizontal spacing, but what can I do to make the spacing look better as the size of the application increases? I would also like the text in the text fields to resize as the text field increases but have been unable to figure it out.

I have been thinking to use a GridBagLayout but have not had much luck with that either. There is just way too much spacing as the size increases, which does not look good, and I have been unable to find or learn a good solution.

I would appreciate any advice.

Code:

package TestPackage;

import java.awt.GridLayout;
import javax.swing.*;

public class TestGridLayout  {

      public static void main(String[] args) {
             JPanel testPanel = new JPanel(); 
             
             GridLayout layoutManager = new GridLayout(5,2); 
              testPanel.setLayout(layoutManager); 
             
             JLabel platformEnumerationNameLabel = new JLabel(); 
            JLabel logicalEnumerationNameFieldLabel = new JLabel(); 
            JLabel valueTypeUnitNameFieldLabel = new JLabel(); 
            JLabel measurementNameFieldLabel = new JLabel(); 
             JLabel measurementAxisNameFieldLabel = new JLabel(); 
            
             JTextField platformEnumerationNameField = new JTextField(); 
             JTextField logicalEnumerationNameField = new JTextField(); 
             JTextField valueTypeUnitNameField = new JTextField(); 
            JTextField measurementNameField = new JTextField(); 
            JTextField measurementAxisNameField = new JTextField(); 
            
            platformEnumerationNameLabel.setText("Label 1");   
            testPanel.add(platformEnumerationNameLabel); 
            
            platformEnumerationNameField.setText("input some data"); 
            testPanel.add(platformEnumerationNameField); 

            logicalEnumerationNameFieldLabel.setText("Label 2");
            testPanel.add(logicalEnumerationNameFieldLabel); 
            
            logicalEnumerationNameField.setText("input some data"); 
            testPanel.add(logicalEnumerationNameField); 
            
            valueTypeUnitNameFieldLabel.setText("Label 3");
            testPanel.add(valueTypeUnitNameFieldLabel);
            
            valueTypeUnitNameField.setText("input some data");
            testPanel.add(valueTypeUnitNameField); 
            
            measurementNameFieldLabel.setText("Label 4");
            testPanel.add(measurementNameFieldLabel);
            
            measurementNameField.setText("input some data");
            testPanel.add(measurementNameField); 
            
            measurementAxisNameFieldLabel.setText("Label 5");
            testPanel.add(measurementAxisNameFieldLabel);
            
            measurementAxisNameField.setText("input some data");
            testPanel.add(measurementAxisNameField);  
            
            JDialog dialog = new JDialog();
            
            dialog.add(testPanel);
            
            dialog.setSize(700,200); 
            dialog.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
            dialog.setVisible(true);
      }
    }

Code:

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