Bug 49353 Javadoc preference does not indicate bad exe until field is edited. [javadoc]
I upgarded from Sun Java 1.4.2_02 to 1.4.2_03. When I open the Javadoc preference page, the entry fields shows "C:\Java\sun\1.4.2_02\bin\javadoc.exe", which no longer exists but the error icon and message is NOT displayed at the top of the pane. If I edit the field but leave the entry still bogus, THEN the error icon and message appear. I think the error should appear as soon as the pane is displayed. Version 3.0.m6.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javadocexport/JavadocTreeWizardPage.java
/*******************************************************************************
 * Copyright (c) 2000, 2004 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.javadocexport;
import java.io.File;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import java.util.StringTokenizer;
import org.eclipse.jdt.launching.JavaRuntime;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;