feat(ReadXMLUsingPropertieClass): add demo for reading XML configuration with Properties

What
- Added ReadXMLUsingPropertieClass in Package2.
- Uses java.util.Properties to load key-value pairs from an XML file.
- Prints entire Properties object and retrieves value for key `"Name: "`.

Why
- Demonstrates how to load configuration stored in XML format.
- Complements previous examples using `.properties` files and `storeToXML()`.
- Useful when config needs structured storage or integration with XML tools.

How
- Created new Properties object.
- Called loadFromXML(FileInputStream) to parse XML file into Properties.
  • XML must follow the DTD defined by Properties (keys/values as `<entry>` elements).
- Accessed individual property using getProperty("Name: ").
- Printed full Properties map to console.

Logic
- loadFromXML reads standard Java Properties XML format:
  <properties>
     <comment>...</comment>
     <entry key="Name: ">Value</entry>
  </properties>
- Keys and values remain Strings.
- If the key is not found, getProperty() returns null.
- Unlike `.properties` files, encoding is always UTF-8 for XML.

Real-life applications
- Store user preferences, metadata, or app settings in XML form.
- Easier integration with XML-based configuration systems.
- Better readability and extensibility compared to flat `.properties` files.
- Common in apps where configuration must be both human-readable and tool-friendly.

Summary
- ReadXMLUsingPropertieClass shows loading settings from an XML file into Properties.
- Demonstrates retrieving both all entries and a specific key.
- Highlights Properties versatility: supports both `.properties` (text) and `.xml` formats.

Signed-off-by: https://github.com/Someshdiwan <someshdiwan369@gmail.com>

Author: Someshdiwan

Section23JavaIOStreams/Properties/src/Package2/ReadXMLUsingPropertieClass.java

@@ -0,0 +1,14 @@
+package Package2;
+
+import java.io.FileInputStream;
+import java.util.Properties;
+
+public class ReadXMLUsingPropertieClass {
+    public static void main(String[] args)throws Exception {
+        Properties p = new Properties();
+        p.loadFromXML(new FileInputStream("/Users/somesh/Java SE/JavaEvolution-Learning-Growing-Mastering/Section23JavaIOStreams/Properties/src/Package2/Person.xml"));
+
+        System.out.println(p);
+        System.out.println(p.getProperty("Name: "));
+    }
+}