title: Get layout constraints for a component in Java Swing
body: <p>Below is a mock up of code that I've been working on.</p>
  
  <pre><code>
  
  public class Pane {
  
      private final JPanel pane;
      private JPanel namePanel;
      private final JTextField panIdField;
  
      public Pane() {
          pane = new JPanel();
          pane.setLayout(new MigLayout("", "[][grow]", "[][][][][]"));
  
          namePanel = new JPanel();
          pane.add(namePanel, "cell 1 1,growx");
  
          panIdField = new JTextField();
          pane.add(panIdField, "cell 1 2,growx");
          panIdField.setColumns(10);
  
      }
  
      public void replaceNameField(JPanel newNamePanel) {
          this.namePanel = newNamePanel;
          // Object constraintsForNamePanel = 
          pane.remove(namePanel);
          pane.add(newNamePanel, constraintsForNamePanel);
      }
  
  }
  
  </code></pre>
  
  <p>In Container there's method </p>
  
  <pre><code>public void add(Component comp, Object constraints)
  </code></pre>
  
  <p>Is there any way that we can programatically get the <code>constraints</code> that we set, like <code>getConstraints(...)</code> so that we can use it for later use?</p>
  
  <p>In my code, I want to use it to replace a old component with a new one at the same place.</p>
  
  <p>What do I have to do after </p>
  
  <pre><code> Object constraintsForNamePanel = 
  </code></pre>
  
  <p>to get the constraints for <code>namePanel</code>.</p>
  
  <p>Currently, I'm using</p>
  
  <pre><code>pane.add(newNamePanel, "cell 1 1,growx");
  </code></pre>
  
  <p>It is working but the problem is I'm using <code>WindowsBuilder</code> for UI and my UI is like to change when I add new components to the <code>pane</code> and I don't want to copy and paste the constraints.</p>