Bug 21583 Generate Javadoc won't link prereqed projects
In the export wizard for generating javadoc, there is no easy way to link the javadoc from a prereqed project. The wizard has a screen for linking in javadoc from libraries included in the classpath, but projects in the classpath do not show up. I got a temporary workaround from the news group. Just add a "-link URL_TO_OTHER_PROJECT_JAVADOC" in the javadoc options page, but there should be an easier way to do this.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javadocexport/JavadocStandardWizardPage.java
}
	protected String makeHrefString() {
		boolean firstTime= true;
		StringBuffer buf= new StringBuffer();
		List els = fListDialogField.getCheckedElements();
		URL url = null;
		for (Iterator iterator = els.iterator(); iterator.hasNext();) {
			try {
				IJavaElement element = (IJavaElement) iterator.next();
				url = JavaDocLocations.getJavadocBaseLocation(element);
			} catch (JavaModelException e) {
				JavaPlugin.log(e);
				continue;
			}
			if (url != null) {
				if(firstTime)
					firstTime= false;
				else buf.append(";"); 
				buf.append(url.toExternalForm());
			}
		}
		return buf.toString();
	}
	
	
	public void setVisible(boolean visible) {
		super.setVisible(visible);
		if (visible) {
			doValidation(STYLESHEETSTATUS);