How to use org.eclipse.jdt.internal.ui.javaeditor

@Override
public void dispose() {
  // http://bugs.eclipse.org/bugs/show_bug.cgi?id=18510
  IDocumentProvider documentProvider= getDocumentProvider();
  if (documentProvider instanceof ClassFileDocumentProvider)
    ((ClassFileDocumentProvider) documentProvider).removeInputChangeListener(this);
  super.dispose();
}

protected void doSetInput(IEditorInput input) throws CoreException {
  super.doSetInput(input);
  configureToggleCommentAction();
  if (fJavaEditorErrorTickUpdater != null)
    fJavaEditorErrorTickUpdater.updateEditorImage(getInputJavaElement());
}

/**
 * Creates the outline page used with this editor.
 *
 * @return the created Java outline page
 */
protected JavaOutlinePage createOutlinePage() {
  JavaOutlinePage page= new JavaOutlinePage(fOutlinerContextMenuId, this);
  fOutlineSelectionChangedListener.install(page);
  setOutlinePageInput(page, getEditorInput());
  return page;
}

FormatElementAction() {
  setText(JavaEditorMessages.JavaEditor_FormatElementAction_label);
  setDescription(JavaEditorMessages.JavaEditor_FormatElementAction_description);
  setEnabled(isEditorInputModifiable());
}

@Override
public void replace(int position, int length, String text) {
  if (DEBUG_LINE_DELIMITERS) {
    validateLineDelimiters(text);
  }
  fReplaceCmd.replace(position, length, text);
}

protected MarkerAnnotation createMarkerAnnotation(IMarker marker) {
  if (JavaMarkerAnnotation.isJavaAnnotation(marker))
    return new JavaMarkerAnnotation(marker);
  return new InternalMarkerAnnotation(marker);
}

/**
 * @return <code>true</code> if Semantic Highlighting is enabled.
 *
 * @since 3.0
 */
private boolean isSemanticHighlightingEnabled() {
  return SemanticHighlightings.isEnabled(getPreferenceStore());
}

private Object getAnnotations(Position position) {
  synchronized (getLockObject()) {
    return fReverseMap.get(position);
  }
}

  @Override
  protected IAction createAction(ITextEditor editor, IVerticalRulerInfo rulerInfo) {
    return new JavaSelectAnnotationRulerAction(JavaEditorMessages.getBundleForConstructedKeys(), "JavaSelectAnnotationRulerAction.", editor, rulerInfo); //$NON-NLS-1$
  }
}

@Override
protected void installOverrideIndicator(boolean provideAST) {
  super.installOverrideIndicator(provideAST);
  if (fOverrideIndicatorManager == null)
    return;
  addReconcileListener(fOverrideIndicatorManager);
}

  @Override
  public void update() {
    setEnabled(isEditorInputModifiable());
  }
}

/**
 * Informs the editor that its outliner has been closed.
 */
public void outlinePageClosed() {
  if (fOutlinePage != null) {
    fOutlineSelectionChangedListener.uninstall(fOutlinePage);
    fOutlinePage= null;
    resetHighlightRange();
  }
}

FormatElementAction() {
  setText(JavaEditorMessages.JavaEditor_FormatElementAction_label);
  setDescription(JavaEditorMessages.JavaEditor_FormatElementAction_description);
  setEnabled(isEditorInputModifiable());
}

public void dispose() {
  // http://bugs.eclipse.org/bugs/show_bug.cgi?id=18510
  IDocumentProvider documentProvider= getDocumentProvider();
  if (documentProvider instanceof ClassFileDocumentProvider)
    ((ClassFileDocumentProvider) documentProvider).removeInputChangeListener(this);
  super.dispose();
}

@Override
public void replace(int position, int length, String text) {
  if (DEBUG_LINE_DELIMITERS) {
    validateLineDelimiters(text);
  }
  fReplaceCmd.replace(position, length, text);
}

/**
 * @return <code>true</code> if Semantic Highlighting is enabled.
 *
 * @since 3.0
 */
private boolean isSemanticHighlightingEnabled() {
  return SemanticHighlightings.isEnabled(getPreferenceStore());
}

private Object getAnnotations(Position position) {
  synchronized (getLockObject()) {
    return fReverseMap.get(position);
  }
}

  @Override
  protected IAction createAction(ITextEditor editor, IVerticalRulerInfo rulerInfo) {
    return new JavaSelectAnnotationRulerAction(JavaEditorMessages.getBundleForConstructedKeys(), "JavaSelectAnnotationRulerAction.", editor, rulerInfo); //$NON-NLS-1$
  }
}

protected void installOverrideIndicator(boolean provideAST) {
  super.installOverrideIndicator(provideAST);
  if (fOverrideIndicatorManager == null)
    return;
  addReconcileListener(fOverrideIndicatorManager);
}

public void replace(int position, int length, String text) {
  if (DEBUG_LINE_DELIMITERS) {
    validateLineDelimiters(text);
  }
  fReplaceCmd.replace(position, length, text);
}