exercice 2

UDP-Scanner/.gitignore

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+.vscode
+bin

UDP-Scanner/README.md

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+## Getting Started
+
+Welcome to the VS Code Java world. Here is a guideline to help you get started to write Java code in Visual Studio Code.
+
+## Folder Structure
+
+The workspace contains two folders by default, where:
+
+- `src`: the folder to maintain sources
+- `lib`: the folder to maintain dependencies
+
+Meanwhile, the compiled output files will be generated in the `bin` folder by default.
+
+> If you want to customize the folder structure, open `.vscode/settings.json` and update the related settings there.
+
+## Dependency Management
+
+The `JAVA PROJECTS` view allows you to manage your dependencies. More details can be found [here](https://github.com/microsoft/vscode-java-dependency#manage-dependencies).

UDP-Scanner/src/UDPScanner.java

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+import java.net.DatagramSocket;
+import java.net.SocketException;
+
+public class UDPScanner {
+    public static void main(String[] args) throws Exception {
+        int minPort = 1024;
+        int maxPort = 65535;
+        for (int i = minPort; i < maxPort; i++) {
+            if(scanPort(i)){
+                System.out.println("Port " + i + " utilisé !");
+            }
+        }
+    }
+
+    /**
+     * Vérifie la disponibilité du port
+     * @param port le port à vérifier
+     * @return true si le port est utilisé
+     */
+    private static boolean scanPort(int port) {
+        try {
+            DatagramSocket socket = new DatagramSocket(port);
+            socket.close();
+            return false;
+        } catch (SocketException e) {
+            return true;
+        }
+    }
+}