java.lang.NoSuchMethodError: nu.xom.Serializer.getEncoding()Ljava/lang/String;

I have one JSON file and task is to convert into XML. Attached is my java file through, Getting an error at line 30 Exception in thread "main" java.lang.NoSuchMethodError: nu.xom.Serializer.getEncoding()Ljava/lang/String;. Please check.

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import java.io.InputStream;  
 
import net.sf.json.JSON;  
import net.sf.json.JSONSerializer;  
import net.sf.json.xml.JSONTypes;  
import net.sf.json.xml.XMLSerializer;  
 
import org.apache.commons.io.IOUtils;  
import org.json.JSONObject;  
 
 
public class temp {  
 
    public static void main(String[] args) throws Exception  
    {  
        try 
    {  
          
              
        InputStream is = temp.class.getResourceAsStream("manifest.json");  
        String jsonData = IOUtils.toString(is);  
        System.out.println(jsonData);  
        JSONObject jObj=new JSONObject(jsonData);  
          
        XMLSerializer serializer = new XMLSerializer();   
        JSON json = JSONSerializer.toJSON(jsonData);   
        System.out.println(jsonData);  
        System.out.println(json);  
        serializer.setRootName("SampleJSON");  
        String xml1 = serializer.write(json);  
        System.out.println(xml1);         
          
    }  
        catch(Exception e)  
        {  
            e.printStackTrace();  
        }  
}  
} 
Make sure you have xom.jar in your classpath

Please try the below code snippet.

JSONObject o = new JSONObject("{'glossary': {'title': 'example glossary','GlossDiv': {'title': 'S','GlossList': {'GlossEntry': {'ID': 'SGML','SortAs': 'SGML','GlossTerm': 'Standard Generalized Markup Language','Acronym': 'SGML','Abbrev': 'ISO 8879:1986','GlossDef': {'para': 'A meta-markup language, used to create markup languages such as DocBook.', 'GlossSeeAlso': ['GML', 'XML']},'GlossSee': 'markup'}} } } }");

String xml = org.json.XML.toString(o);

System.out.println(xml);

Above stuff should work with out adding any new jars. Try and let me know with the output.