Java Utililty Methods XML Document from String

DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setValidating(false);
dbf.setNamespaceAware(true);
DocumentBuilder db = dbf.newDocumentBuilder();
InputSource source = new InputSource(new StringReader(xmlString));
Document doc = db.parse(source);
return doc;

InputSource inputSource = new InputSource(new StringReader(xml));
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
try {
    DocumentBuilder builder = factory.newDocumentBuilder();
    Document doc = builder.parse(inputSource);
    return doc;
} catch (Exception ex) {
    throw new RuntimeException(ex.getMessage(), ex);
...

return loadXMLFrom(new java.io.ByteArrayInputStream(xml.getBytes()));

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
InputSource is = new InputSource(new StringReader(xml));
return builder.parse(is);

try {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    factory.setNamespaceAware(true);
    DocumentBuilder builder = factory.newDocumentBuilder();
    return builder.parse(new ByteArrayInputStream(xml.getBytes("UTF-8")));
} catch (Exception e) {
    return null;

try {
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    InputSource is = new InputSource(new StringReader(xml));
    return builder.parse(is);
} catch (ParserConfigurationException | SAXException | IOException e) {
return null;
...

ensureFactory();
try {
    DocumentBuilder builder = mFactory.newDocumentBuilder();
    return builder.parse(new ByteArrayInputStream(xml.getBytes("UTF-8")));
} catch (Exception e) {
    if (e instanceof SAXParseException) {
        SAXParseException spe = (SAXParseException) e;
        int l = spe.getLineNumber();
...