Bug 44318 annotation hovers don't show up
...if Preferences-->Java-->Editor-->Annotations-->Analyze annotations while typing is turned off. upon saving/compiling files the yellow and red underlines for warnings and errors show up, but not the hovers.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/hover/AnnotationHover.java
/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.ui.text.java.hover;
import java.util.Iterator;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.Position;
import org.eclipse.jface.text.source.Annotation;
import org.eclipse.jface.text.source.IAnnotationModel;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.texteditor.AnnotationPreference;
import org.eclipse.ui.texteditor.IAnnotationExtension;
import org.eclipse.ui.texteditor.IDocumentProvider;
import org.eclipse.ui.texteditor.MarkerAnnotationPreferences;
import org.eclipse.jdt.ui.PreferenceConstants;
import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jdt.internal.ui.javaeditor.CompilationUnitEditor;
import org.eclipse.jdt.internal.ui.javaeditor.IJavaAnnotation;
import org.eclipse.jdt.internal.ui.javaeditor.JavaAnnotationIterator;
import org.eclipse.jdt.internal.ui.text.HTMLPrinter;
public class AnnotationHover extends AbstractJavaEditorTextHover {