In Java, you can use the Properties class to load and store properties from a file. To convert properties to XML, you can use the Properties.storeToXML method, which writes the properties to an OutputStream in XML format.

Here's an example of how to convert properties to XML:

import java.io.FileOutputStream;
import java.util.Properties;

public class PropertiesToXML {
    public static void main(String[] args) {
        // Load properties from file
        Properties props = new Properties();
        try (FileInputStream fis = new FileInputStream("myprops.properties")) {
            props.load(fis);
        } catch (IOException e) {
            e.printStackTrace();
        }

        // Write properties to XML file
        try (FileOutputStream fos = new FileOutputStream("myprops.xml")) {
            props.storeToXML(fos, "My Properties");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

In this example, we load properties from a file called myprops.properties and store them in a Properties object. We then write the properties to an XML file called myprops.xml using the storeToXML method.

The storeToXML method takes two arguments: an OutputStream to write the XML to, and a string that represents a comment to include in the XML file. The XML file will contain a root element called properties with child elements for each property. The child elements will have a name attribute that contains the key of the property, and a value attribute that contains the value of the property.

Note that the storeToXML method does not escape special characters in property values, so you may need to escape them manually if they are present in your properties.