JEditorPane and HTMLEditorKit: can't set alignment after invoking setText

Question

When i write text into JEditorPane i can change the alignment of this text.
With getText i get the html-code. After invoking setText() with this html-code the alignment-action does not work.
Here is some test-code to show this. but the test fails only sometimes.
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.util.HashMap;
import java.util.Map;
import javax.swing.Action;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.text.html.HTMLEditorKit;
import junit.extensions.jfcunit.JFCTestCase;
import junit.extensions.jfcunit.JFCTestHelper;
import junit.extensions.jfcunit.eventdata.KeyEventData;
import junit.framework.AssertionFailedError;
public class EditorPaneTest extends JFCTestCase {
  // Private instance variables ( fixtures )
  // ==============================================================================================
  private JFCTestHelper jfcHelper= null;
  private JEditorPane testInstance = null;
  public EditorPaneTest( String testName ) {
    super( testName );
  // Class methods
  // ==================================================================================================================
  public static junit.framework.Test suite() {
    junit.framework.TestSuite suite = new junit.framework.TestSuite( EditorPaneTest.class );
      return new junit.extensions.RepeatedTest( suite , 5 );
  // Instance methods
  // ==================================================================================================================
  // Protected ( setup and teardown test case )
  protected void setUp() throws java.lang.Exception {
    super.setUp();
    junit.extensions.jfcunit.JFCTestHelper.setCurrentTestCase( this );
    jfcHelper = new JFCTestHelper();
  protected void tearDown() throws java.lang.Exception {
    try {
      // Add tearDown code for fixtures here
    } // try
    finally {
      jfcHelper = null;
      junit.extensions.jfcunit.TestHelper.cleanUp( this );
      super.tearDown();
    } // finally
  // Public ( testcases )
  @SuppressWarnings("nls")
  public void testCreation() throws Exception {
    SwingUtilities.invokeAndWait( new Runnable() {
      public void run() {
        testInstance = new JEditorPane();
    assertNotNull( testInstance );
    final JFrame frame = new JFrame( "test" );
    frame.getContentPane().add( testInstance , BorderLayout.CENTER );
    frame.setSize( 800 , 600 );
    frame.setDefaultCloseOperation( JFrame.DISPOSE_ON_CLOSE );
    frame.setVisible( true );
    testInstance.setEditorKit( new HTMLEditorKit() );
    Map< String , Action > actionMap = new HashMap< String , Action >();
    Action[] actions = testInstance.getEditorKit().getActions();
    for ( Action a : actions ) {
      actionMap.put( ( String ) a.getValue( Action.NAME ) , a );
    jfcHelper.sendKeyAction( new KeyEventData( this , testInstance , KeyEvent.VK_T ) );
    jfcHelper.sendKeyAction( new KeyEventData( this , testInstance , KeyEvent.VK_S ) );
    jfcHelper.sendKeyAction( new KeyEventData( this , testInstance , KeyEvent.VK_T ) );
    selectAll();
    Action centerAction = actionMap.get( "center-justify" ); //$NON-NLS-1$
    centerAction.actionPerformed( new ActionEvent( this , ActionEvent.ACTION_PERFORMED , "align" ) );
    final String html = testInstance.getText();
    SwingUtilities.invokeAndWait( new Runnable() {
      public void run() {
        testInstance.setText( html );
    final String htmlAfterInit = testInstance.getText();
    selectAll();
    Action leftAction = actionMap.get( "left-justify" );//$NON-NLS-1$
    leftAction.actionPerformed( new ActionEvent( this , ActionEvent.ACTION_PERFORMED , "align" ) );
    final String htmlAfterAlignLeft = testInstance.getText();
    new alltests.AbstractMockTimeoutVerifier( alltests.AbstractMockTimeoutVerifier.Type.SWING ) {
      public void doVerify() throws AssertionFailedError {
        assertFalse( htmlAfterInit.equals( htmlAfterAlignLeft ) );
        System.out.println(htmlAfterInit); //$NON-NLS-1$ // TODO: Remove
        System.out.println("-------------------------"); //$NON-NLS-1$ // TODO: Remove
        System.out.println(htmlAfterAlignLeft); //$NON-NLS-1$ // TODO: Remove
    }.verify();
  // Private ( helpers )
  private void selectAll() throws AssertionFailedError, InterruptedException{
    SwingUtilities.invokeLater( new Runnable() {
      public void run() {
        testInstance.selectAll(); 
    new alltests.AbstractMockTimeoutVerifier( alltests.AbstractMockTimeoutVerifier.Type.SWING ) {
      public void doVerify() throws AssertionFailedError {
        assertTrue( 0 < testInstance.getSelectedText().length() );
    }.verify();
}

Answer 1

I remember having a similiar problem. It was caused by the session not using the properties passed in. I seem to remember I needed to set a system property at startup, but can't remember what it was. JGuru has this to say though:
Q:
I'm getting my Session with Session.getDefaultInstance and its not getting changes to the Properties passed in. What's wrong?
A:
In getDefaultInstance(Properties props), the Properties are only used in the initial call. Future calls ignore the setting, returning the previously created Session. If you need to change the Properties, like to change SMTP servers, you should use getInstance(Properties props) instead.