Section 17 Packages

Signed-off-by: https://github.com/Someshdiwan <[email protected]>

Author: Someshdiwan

Section17Packages/src/Packages.md

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+# Java Packages
+
+A **package** in Java is a way to group related classes, interfaces, and sub-packages.  
+It helps in **organizing code**, **avoiding name conflicts**, and **controlling access**.
+
+## Types of Packages
+1. **Built-in packages** → Provided by Java (e.g., `java.util`, `java.io`, `java.sql`).
+2. **User-defined packages** → Created by developers to organize their own code.
+
+## How to Create a Package
+
+```java
+// File: MyClass.java
+package mypack;
+
+public class MyClass {
+    public void show() {
+        System.out.println("Hello from mypack!");
+    }
+}
+```
+
+Compile with:
+
+javac -d . MyClass.java
+
+Run with:
+
+java mypack.MyClass
+
+Benefits
+	•	Better code organization
+	•	Reusability of classes
+	•	Encapsulation and access control
+	•	Avoids class name collisions