diff --git a/DEV/DEV3.1/TP01/Exercise1/Database.java b/DEV/DEV3.1/TP01/Exercise1/Database.java
new file mode 100644
index 0000000..d20035b
--- /dev/null
+++ b/DEV/DEV3.1/TP01/Exercise1/Database.java
@@ -0,0 +1,65 @@
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class Database {
+
+    //Countries
+    public static String COUNTRY_ID = "id";
+    public static String COUNTRY_NAME = "name";
+
+    //Votes table 
+    public static String VOTES_COMPETITOR_ID = "competitor_id";
+    public static String VOTES_VOTER_ID = "voter_id";
+    public static String VOTES_POINTS = "points";
+    
+    private Connection connection; 
+
+    public Database() {
+        try {
+            Class.forName("org.mariadb.jdbc.Driver");
+
+            this.connection = DriverManager.getConnection(
+                "jdbc:mariadb://dwarves.iut-fbleau.fr/baudrier",
+                "baudrier",
+                "baudrier"
+            );
+        } catch(ClassNotFoundException exception) {
+            System.err.println("Class 'org.mariadb.jdbc.Driver' not found.");
+        } catch(SQLException exception) {
+            System.err.println("Error while trying to connect to the database");
+        }
+    }
+
+    public ResultSet getVotesFromCompetitor(String country) {
+        try {
+            PreparedStatement query = this.connection.prepareStatement(
+                "SELECT Countries.name, Countries.points FROM Votes INNER JOIN Countries ON Votes.competitor_id = Countries.id WHERE Votes.competitor_id = Countries.id"
+            );
+
+            ResultSet result = query.executeQuery();
+
+            try {
+                query.close();
+            } catch(SQLException exception) {
+                System.err.println("Error while trying to close the query.");
+            }
+
+            return result;
+        } catch(SQLException exception) {
+            System.err.println("Error while trying to prepare or execute the query.");
+        }
+
+        return null; 
+    }
+
+    public void close() {
+        try {
+            this.connection.close();
+        } catch(SQLException exception) {
+            System.err.println("Error while trying to close the connection.");
+        }
+    }
+}
diff --git a/DEV/DEV3.1/TP01/Exercise1/Main.java b/DEV/DEV3.1/TP01/Exercise1/Main.java
new file mode 100644
index 0000000..5b54983
--- /dev/null
+++ b/DEV/DEV3.1/TP01/Exercise1/Main.java
@@ -0,0 +1,26 @@
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class Main {
+
+    public static void main(String[] args) {
+        Database database = new Database();
+
+        String country = "France";
+        ResultSet result = database.getVotesFromCompetitor(country);
+        
+        try {
+            while(result.next()) {
+                System.out.println(country + " -> " + result.getString("name") + " : " + result.getInt("points"));
+            }
+        } catch(SQLException exception) {
+            System.err.println("Error while read the data from the result.");
+        }
+
+        try {
+            result.close();
+        } catch(SQLException exception) {
+            System.err.println("Error while trying to close the result.");
+        }
+    }
+}
diff --git a/DEV/DEV3.1/TP01/Exercise1/data.sql b/DEV/DEV3.1/TP01/Exercise1/data.sql
new file mode 100644
index 0000000..de38ba4
--- /dev/null
+++ b/DEV/DEV3.1/TP01/Exercise1/data.sql
@@ -0,0 +1,23 @@
+CREATE TABLE Countries ( 
+    id INT PRIMARY KEY, 
+    name VARCHAR(30)
+);
+
+CREATE TABLE Votes (
+    id INT PRIMARY KEY AUTO_INCREMENT,
+    competitor_id INT REFERENCES Countries(id),
+    voter_id INT REFERENCES Countries(id),
+    points INT NOT NULL,
+    UNIQUE (competitor_id, voter_id)
+)
+
+INSERT INTO Countries VALUES (1, "France");
+INSERT INTO Countries VALUES (2, "Pays-Bas");
+INSERT INTO Countries VALUES (3, "Albanie");
+INSERT INTO Countries VALUES (4, "Italie");
+INSERT INTO Countries VALUES (5, "Russie");
+INSERT INTO Votes VALUES (2, 4, 5);
+INSERT INTO Votes VALUES (2, 5, 5);
+INSERT INTO Votes VALUES (4, 2, 16);
+INSERT INTO Votes VALUES (5, 2, 5);
+INSERT INTO Votes VALUES (5, 4, 8);
\ No newline at end of file
diff --git a/DEV/DEV3.1/TP01/Exercise1/start.sh b/DEV/DEV3.1/TP01/Exercise1/start.sh
new file mode 100755
index 0000000..884b328
--- /dev/null
+++ b/DEV/DEV3.1/TP01/Exercise1/start.sh
@@ -0,0 +1,2 @@
+javac Main.java;
+java -cp "/export/documents/mariadb-client.jar" Main;
\ No newline at end of file
diff --git a/DEV/DEV3.1/TP02/Exercise1/Part1/ClickSwapImageEvent.java b/DEV/DEV3.1/TP02/Exercise1/Part1/ClickSwapImageEvent.java
new file mode 100644
index 0000000..09c8cb8
--- /dev/null
+++ b/DEV/DEV3.1/TP02/Exercise1/Part1/ClickSwapImageEvent.java
@@ -0,0 +1,20 @@
+import java.awt.event.MouseAdapter;
+import java.awt.event.MouseEvent;
+
+public class ClickSwapImageEvent extends MouseAdapter {
+
+    private ImageWindow window;
+    
+    public ClickSwapImageEvent(ImageWindow window) {
+        this.window = window;
+    }
+
+    public void mouseClicked(MouseEvent event) {
+        if(event.getX() > this.window.getWidth() / 2) {
+            this.window.nextImage();
+            return; 
+        }
+
+        this.window.lastImage();
+    }
+}
diff --git a/DEV/DEV3.1/TP02/Exercise1/Part1/ImageWindow.java b/DEV/DEV3.1/TP02/Exercise1/Part1/ImageWindow.java
new file mode 100644
index 0000000..415cc91
--- /dev/null
+++ b/DEV/DEV3.1/TP02/Exercise1/Part1/ImageWindow.java
@@ -0,0 +1,87 @@
+import java.io.File;
+
+import javax.swing.ImageIcon;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+
+public class ImageWindow extends JFrame {
+
+    private ImageIcon[] images; 
+    private int cursor;
+
+    private JLabel label; 
+    
+    public ImageWindow() {
+        this.setSize(1024, 1024);
+        this.setLocationRelativeTo(null);
+        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+
+        File resourcesDirectory = new File("../resources/");
+
+        if(resourcesDirectory.exists() && resourcesDirectory.isDirectory()) {
+            File[] files = resourcesDirectory.listFiles();
+
+            if(files != null) {
+                this.images = new ImageIcon[files.length];
+                this.cursor = 0;
+
+                for(File file : files) {
+                    this.images[this.cursor] = new ImageIcon(file.getPath());
+                    this.cursor++;
+                }
+            }
+        }
+
+        this.addMouseListener(new ClickSwapImageEvent(this));
+
+        this.cursor = 0;
+
+        this.nextImage();
+    }
+
+    public void nextImage() {
+        if(this.images.length == 0) return;
+
+        if(this.label != null) {
+            this.remove(this.label);
+        }
+
+        this.label = new JLabel(this.images[cursor]);
+        this.label.setVerticalAlignment(JLabel.CENTER);
+        this.label.setHorizontalAlignment(JLabel.CENTER);
+
+        if(this.cursor + 1 >= this.images.length) {
+            this.cursor = 0;
+        } else {
+            this.cursor++;
+        }
+
+        System.out.println(this.cursor);
+
+        this.add(label);
+        this.revalidate();
+    }
+
+    public void lastImage() {
+        if(this.images.length == 0) return;
+
+        if(this.label != null) {
+            this.remove(this.label);
+        }
+
+        this.label = new JLabel(this.images[cursor]);
+        this.label.setVerticalAlignment(JLabel.CENTER);
+        this.label.setHorizontalAlignment(JLabel.CENTER);
+
+        if(this.cursor - 1 < 0) {
+            this.cursor = this.images.length - 1;
+        } else {
+            this.cursor--;
+        }
+
+        System.out.println(this.cursor);
+
+        this.add(label);
+        this.revalidate();
+    }
+}
diff --git a/DEV/DEV3.1/TP02/Exercise1/Part1/Main.java b/DEV/DEV3.1/TP02/Exercise1/Part1/Main.java
new file mode 100644
index 0000000..49e2da6
--- /dev/null
+++ b/DEV/DEV3.1/TP02/Exercise1/Part1/Main.java
@@ -0,0 +1,7 @@
+public class Main {
+    
+    public static void main(String[] args) {
+        ImageWindow window = new ImageWindow();
+        window.setVisible(true);
+    }
+}
diff --git a/DEV/DEV3.1/TP02/Exercise1/Part2/ClickSwapImageEvent.java b/DEV/DEV3.1/TP02/Exercise1/Part2/ClickSwapImageEvent.java
new file mode 100644
index 0000000..998a2ee
--- /dev/null
+++ b/DEV/DEV3.1/TP02/Exercise1/Part2/ClickSwapImageEvent.java
@@ -0,0 +1,5 @@
+package Part2;
+
+public class ClickSwapImageEvent {
+    
+}
diff --git a/DEV/DEV3.1/TP02/Exercise1/Part2/ImageWindow.java b/DEV/DEV3.1/TP02/Exercise1/Part2/ImageWindow.java
new file mode 100644
index 0000000..b210479
--- /dev/null
+++ b/DEV/DEV3.1/TP02/Exercise1/Part2/ImageWindow.java
@@ -0,0 +1,26 @@
+import java.io.File;
+
+import java.awt.CardLayout;
+
+import javax.swing.ImageIcon;
+import javax.swing.JFrame;
+
+public class ImageWindow extends JFrame {
+
+    private CardLayout card; 
+    
+    public ImageWindow() {
+        this.card = new CardLayout();
+
+        File resourcesDirectory = new File("../resources/");
+
+        if(resourcesDirectory.exists() && resourcesDirectory.isDirectory()) {
+            File[] files = resourcesDirectory.listFiles();
+
+            if(files != null) {
+                for(File file : files) {
+                }
+            }
+        }
+    }
+}
diff --git a/DEV/DEV3.1/TP02/Exercise1/Part2/Main.java b/DEV/DEV3.1/TP02/Exercise1/Part2/Main.java
new file mode 100644
index 0000000..57f8e1d
--- /dev/null
+++ b/DEV/DEV3.1/TP02/Exercise1/Part2/Main.java
@@ -0,0 +1,5 @@
+package Part2;
+
+public class Main {
+    
+}
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