Bug 51895 Error when recovering javadoc archive path for a jar
1. add swt.jar to the Java build path of a project 2. open the properties dialog for this jar from the package explorer 3. change the javadoc location to : [x] javadoc in archive archive path: <path_to_eclipse>/plugins/org.eclipse.platform/doc/isv/doc.zip (in my case '/home/luc/host/eclipse/plugins/org.eclipse.platform/doc/isv/doc.zip') path within archive: reference/api 4. close the properties dialog 5. reopen the properties dialog The leading slash is missing, the dialog display the error 'the archive is missing '
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/JavadocConfigurationBlock.java
private IStatus updateArchivePathStatus() {
		
		try {
			fArchiveURLResult= getArchiveURL();
		} catch (MalformedURLException e) {
			fArchiveURLResult= null;
			StatusInfo status= new StatusInfo();
			status.setError(e.getMessage());  
			
			return status;
		}
		return new StatusInfo();
	
	}
	
	
	private URL getArchiveURL() throws MalformedURLException {
		String jarLoc= fArchiveField.getText();
		String innerPath= fArchivePathField.getText().trim();
		
		StringBuffer buf= new StringBuffer();
		buf.append("jar:"); 
		buf.append(new File(jarLoc).toURL().toExternalForm());
		buf.append('!');
		if (innerPath.length() > 0) {
			if (innerPath.charAt(0) != '/') {
				buf.append('/');
			}
			buf.append(innerPath);
		} else {