diff --git a/DEV2.1/TP5:MiseEnPageEtDessin/Sautoir.class b/DEV2.1/TP5:MiseEnPageEtDessin/Sautoir.class
new file mode 100644
index 0000000..c086cf0
Binary files /dev/null and b/DEV2.1/TP5:MiseEnPageEtDessin/Sautoir.class differ
diff --git a/DEV2.1/TP5:MiseEnPageEtDessin/Sautoir.java b/DEV2.1/TP5:MiseEnPageEtDessin/Sautoir.java
index 13ce3b2..66dac1c 100644
--- a/DEV2.1/TP5:MiseEnPageEtDessin/Sautoir.java
+++ b/DEV2.1/TP5:MiseEnPageEtDessin/Sautoir.java
@@ -4,7 +4,18 @@ import java.awt.*;
 public class Sautoir extends JComponent{
 
 	protected void paintComponent(Graphics pinceau) {
-    // obligatoire : on crée un nouveau pinceau pour pouvoir le modifier plus tard
-    Graphics pinceau = pinceau.create();
-    pinceau.setColor(Color.CYAN);
-    pinceau.fillPolygon([0,0],[50,0],3);
\ No newline at end of file
+    // obligatoire : on cree un nouveau pinceau pour pouvoir le modifier plus tard
+    Graphics pinceau2 = pinceau.create();
+    if (this.isOpaque()) {
+      // obligatoire : on repeint toute la surface avec la couleur de fond
+      pinceau2.setColor(this.getBackground());
+      pinceau2.fillRect(0, 0, this.getWidth(), this.getHeight());
+    }
+    pinceau2.setColor(Color.CYAN);
+    int[] x={0, getWidth()/2, getWidth()};
+    int[] yt={0, getHeight()/2, 0};
+    pinceau2.fillPolygon(x,yt,3);
+    int[] yb={ getHeight(), getHeight()/2, getHeight()};
+    pinceau2.fillPolygon(x,yb,3);
+	}
+}
diff --git a/DEV2.1/TP6 b/DEV2.1/TP6
new file mode 100644
index 0000000..e69de29
diff --git a/DEV2.1/TP6:Polymorphisme/MainVehicule.class b/DEV2.1/TP6:Polymorphisme/MainVehicule.class
new file mode 100644
index 0000000..2a49f90
Binary files /dev/null and b/DEV2.1/TP6:Polymorphisme/MainVehicule.class differ
diff --git a/DEV2.1/TP6:Polymorphisme/MainVehicule.java b/DEV2.1/TP6:Polymorphisme/MainVehicule.java
new file mode 100644
index 0000000..e773aba
--- /dev/null
+++ b/DEV2.1/TP6:Polymorphisme/MainVehicule.java
@@ -0,0 +1,22 @@
+import javax.swing.JOptionPane;
+
+public class MainVehicule{
+  public static void main(String[] args) {
+    Vehicule v;
+    Object[] choix = {"Voiture", "Moto"};
+ 
+    int reponse = JOptionPane.showOptionDialog(null,
+      "Quel v\u00E9hicule choisissez-vous ?",
+      "Question",
+      JOptionPane.DEFAULT_OPTION,
+      JOptionPane.QUESTION_MESSAGE,
+      null,
+      choix,
+      null);
+    if (reponse == 0)
+      v = new Voiture();
+    else
+      v = new Moto();
+    System.out.println("Une "+v.sorte()+" poss\u00E8de "+v.nbRoues()+" roues.");
+  }
+}
\ No newline at end of file
diff --git a/DEV2.1/TP6:Polymorphisme/Moto.class b/DEV2.1/TP6:Polymorphisme/Moto.class
new file mode 100644
index 0000000..8c054d8
Binary files /dev/null and b/DEV2.1/TP6:Polymorphisme/Moto.class differ
diff --git a/DEV2.1/TP6:Polymorphisme/Moto.java b/DEV2.1/TP6:Polymorphisme/Moto.java
new file mode 100644
index 0000000..f1ff095
--- /dev/null
+++ b/DEV2.1/TP6:Polymorphisme/Moto.java
@@ -0,0 +1,5 @@
+public class Moto extends VehiculeAbstract{
+	public Moto(){
+		super(2,"Moto");
+	}
+}
\ No newline at end of file
diff --git a/DEV2.1/TP6:Polymorphisme/Moyenne.class b/DEV2.1/TP6:Polymorphisme/Moyenne.class
new file mode 100644
index 0000000..9bef0cd
Binary files /dev/null and b/DEV2.1/TP6:Polymorphisme/Moyenne.class differ
diff --git a/DEV2.1/TP6:Polymorphisme/Moyenne.java b/DEV2.1/TP6:Polymorphisme/Moyenne.java
new file mode 100644
index 0000000..a0f3f05
--- /dev/null
+++ b/DEV2.1/TP6:Polymorphisme/Moyenne.java
@@ -0,0 +1,23 @@
+public class Moyenne{
+	private double total=0;
+	private long cpt=0;
+
+	public void add(Number val){
+		total += val.doubleValue();
+		++cpt;
+	}
+
+	public double getAverage(){
+		if (cpt==0){
+			return 0;
+		}
+		return total/cpt;
+	}
+
+	public static void main(String[] args) {
+		Moyenne m = new Moyenne();
+		m.add(5.5);
+		m.add(10);
+		System.out.println(m.getAverage());
+	}
+}
\ No newline at end of file
diff --git a/DEV2.1/TP6:Polymorphisme/Vehicule.class b/DEV2.1/TP6:Polymorphisme/Vehicule.class
new file mode 100644
index 0000000..a9f0cdb
Binary files /dev/null and b/DEV2.1/TP6:Polymorphisme/Vehicule.class differ
diff --git a/DEV2.1/TP6:Polymorphisme/Vehicule.java b/DEV2.1/TP6:Polymorphisme/Vehicule.java
new file mode 100644
index 0000000..e7edc06
--- /dev/null
+++ b/DEV2.1/TP6:Polymorphisme/Vehicule.java
@@ -0,0 +1,4 @@
+public interface Vehicule{
+  int nbRoues();
+  String sorte();
+}
\ No newline at end of file
diff --git a/DEV2.1/TP6:Polymorphisme/VehiculeAbstract.class b/DEV2.1/TP6:Polymorphisme/VehiculeAbstract.class
new file mode 100644
index 0000000..5061935
Binary files /dev/null and b/DEV2.1/TP6:Polymorphisme/VehiculeAbstract.class differ
diff --git a/DEV2.1/TP6:Polymorphisme/VehiculeAbstract.java b/DEV2.1/TP6:Polymorphisme/VehiculeAbstract.java
new file mode 100644
index 0000000..b1e7065
--- /dev/null
+++ b/DEV2.1/TP6:Polymorphisme/VehiculeAbstract.java
@@ -0,0 +1,18 @@
+public abstract class VehiculeAbstract implements Vehicule{
+
+  private int nbRoues;
+  private String sorte;
+  
+  public VehiculeAbstract(int nbRoues, String sorte){
+  	this.nbRoues=nbRoues;
+  	this.sorte=sorte;
+  }
+
+  public int nbRoues(){
+  	return nbRoues;
+  }
+
+  public String sorte(){
+  	return sorte;
+  }
+}
\ No newline at end of file
diff --git a/DEV2.1/TP6:Polymorphisme/Voiture.class b/DEV2.1/TP6:Polymorphisme/Voiture.class
new file mode 100644
index 0000000..e041b80
Binary files /dev/null and b/DEV2.1/TP6:Polymorphisme/Voiture.class differ
diff --git a/DEV2.1/TP6:Polymorphisme/Voiture.java b/DEV2.1/TP6:Polymorphisme/Voiture.java
new file mode 100644
index 0000000..f81b227
--- /dev/null
+++ b/DEV2.1/TP6:Polymorphisme/Voiture.java
@@ -0,0 +1,5 @@
+public class Voiture extends VehiculeAbstract{
+	public Voiture(){
+		super(4,"Voiture");
+	}
+}
\ No newline at end of file