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There are several ways to achieve the conversion of an XML string to a Java object:

1. DOM Parser: This is a standard Java API for parsing XML documents. It reads the entire XML document into memory and constructs a tree-like structure. This structure can be navigated and processed using Java code. It involves creating DocumentBuilderFactory, DocumentBuilder and Document objects.

Example code:

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); DocumentBuilder builder = factory.newDocumentBuilder(); Document document = builder.parse(new InputSource(new StringReader(xmlString)));

1. JAXB: JAXB (Java Architecture for XML Binding) is a Java technology that allows Java objects to be mapped to and from XML documents. JAXB generates Java code from an XML schema, which can then be used to create Java objects that map to the XML document.

Example code:

JAXBContext jaxbContext = JAXBContext.newInstance(MyClass.class); Unmarshaller unmarshaller = jaxbContext.createUnmarshaller(); MyClass myObject = (MyClass) unmarshaller.unmarshal(new StringReader(xmlString));

1. XStream: XStream is a Java library that can convert Java objects to and from XML. It uses reflection to serialize and deserialize Java objects. It is easy to use and requires no configuration.

Example code:

XStream xstream = new XStream(); MyClass myObject = (MyClass) xstream.fromXML(xmlString);

Note that these are just a few examples and there are other libraries available for XML parsing and serialization. The choice of library depends on the specific requirements of the project.