diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
new file mode 100644
index 0000000..7e2a369
--- /dev/null
+++ b/.devcontainer/devcontainer.json
@@ -0,0 +1,27 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/java
+{
+	"name": "Java",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	"image": "mcr.microsoft.com/devcontainers/java:1-17-bullseye",
+
+	"features": {
+		"ghcr.io/devcontainers/features/java:1": {
+			"version": "none",
+			"installMaven": "false",
+			"installGradle": "false"
+		}
+	}
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "java -version",
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}
diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..f33a02c
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,12 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for more information:
+# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+# https://containers.dev/guide/dependabot
+
+version: 2
+updates:
+ - package-ecosystem: "devcontainers"
+   directory: "/"
+   schedule:
+     interval: weekly
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..c5e82d7
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+bin
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..0ac215c
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,7 @@
+{
+    "java.project.sourcePaths": ["src"],
+    "java.project.outputPath": "bin",
+    "java.project.referencedLibraries": [
+        "lib/**/*.jar"
+    ]
+}
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..ae064ca
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+## Aula 09 - Classes (exercícios II)
+
+Código para um reprodutor de músicas (simulador).
\ No newline at end of file
diff --git a/src/music/App.java b/src/music/App.java
new file mode 100644
index 0000000..de95d4e
--- /dev/null
+++ b/src/music/App.java
@@ -0,0 +1,68 @@
+package music;
+
+public class App {
+
+    // public static void simulatePlayer(Player player) {
+    //     while (player.isPlaying()) {
+    //         System.out.println("Tocando: " + player.getCurrentTrack().toString());
+    //         try {
+    //             Thread.sleep(player.getCurrentTrack().getDuration() * 10);
+    //         } catch (InterruptedException e) {
+    //             e.printStackTrace();
+    //         }
+    //         if (player.getQueuePlaylist().getNumberOfTracks() == 0) {
+    //             player.stop();
+    //         } else {
+    //             player.nextTrack();
+    //         }
+    //     }
+    // }
+    public static void main(String[] args) {
+        // Player player = new Player();
+        // Playlist playlist = new Playlist("Top 20 Hits Ever");
+
+        // playlist.addTrack(new Track("Bohemian Rhapsody", "Queen", "A Night at the Opera", 1975, 555));
+        // playlist.addTrack(new Track("Imagine", "John Lennon", "Imagine", 1971, 217)); // Duration in seconds
+        // playlist.addTrack(new Track("What a Wonderful World", "Louis Armstrong", "Satchmo Sings Darin", 1968, 128));
+        // playlist.addTrack(new Track("Hallelujah", "Leonard Cohen", "Various Positions", 1984, 240));
+        // playlist.addTrack(new Track("Singin' in the Rain", "Gene Kelly", "Singin' in the Rain", 1952, 208));
+        // playlist.addTrack(new Track("Back in Black", "AC/DC", "Back in Black", 1980, 255));
+        // playlist.addTrack(new Track("Billie Jean", "Michael Jackson", "Thriller", 1982, 334));
+        // playlist.addTrack(new Track("Clair de Lune", "Claude Debussy", "Unknown", 1890, 280));
+        // playlist.addTrack(new Track("Hey Jude", "The Beatles", "Hey Jude", 1968, 431));
+        // playlist.addTrack(new Track("Hotel California", "Eagles", "Hotel California", 1976, 390));
+        // playlist.addTrack(new Track("Lose Yourself", "Eminem", "The Eminem Show", 2002, 300));
+        // playlist.addTrack(new Track("Respect", "Aretha Franklin", "I Never Loved a Man the Way I Love You", 1967, 157));
+        // playlist.addTrack(new Track("Light My Fire", "The Doors", "The Doors", 1967, 428));
+        // playlist.addTrack(new Track("A Whiter Shade of Pale", "Procol Harum", "Procol Harum", 1967, 249));
+        // playlist.addTrack(new Track("Liège Concerto", "Saint-Saëns", "Unknown", 1913, 917));
+        // playlist.addTrack(new Track("Somebody That I Used to Know", "Gotye ft. Kimbra", "Making Mirrors", 2011, 248));
+        // playlist.addTrack(new Track("Can't Stop the Feeling!", "Justin Timberlake", "Trolls", 2016, 230));
+        // playlist.addTrack(new Track("The Sound of Silence", "Simon & Garfunkel", "Wednesday Morning, 3 A.M.", 1964, 189));
+        // playlist.addTrack(new Track("The Boxer", "Simon & Garfunkel", "Bridge over Troubled Water", 1970, 316));
+        // playlist.addTrack(new Track("The Sound of Silence", "Disturbed", "Immortalized", 2015, 248));
+
+        // player.addPlaylist(playlist);
+
+        // System.out.println("Fila de reprodução: ");
+        // System.out.println(player.getQueuePlaylist());
+
+        // player.shuffle();
+
+        // System.out.println("Fila de reprodução: ");
+        // System.out.println(player.getQueuePlaylist());
+
+        // player.play();
+        
+        // System.out.println("Música atual: " + player.getCurrentTrack().toString());
+
+        // player.nextTrack();
+        // System.out.println("Próxima música: " + player.getCurrentTrack().toString());
+        // player.nextTrack();
+        // player.nextTrack();
+        // player.nextTrack();
+        // System.out.println("Próxima música: " + player.getCurrentTrack().toString());
+        // player.previousTrack();
+        // System.out.println("Música anterior: " + player.getCurrentTrack().toString());
+    }
+}