diff --git a/DEV2.1/TP2/Compteur.class b/DEV2.1/TP2/Compteur.class
new file mode 100644
index 0000000..b6456a2
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diff --git a/DEV2.1/TP2/Compteur.java b/DEV2.1/TP2/Compteur.java
new file mode 100644
index 0000000..8ba51e0
--- /dev/null
+++ b/DEV2.1/TP2/Compteur.java
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+public class Compteur 
+{
+  private int compte;
+
+  public Compteur(int start)
+  {
+    this.compte = start;
+  }
+
+  public void plusUn() 
+  {
+    this.compte++;
+  }
+
+  public String toString() 
+  {
+    return Integer.toBinaryString(this.compte);
+  }
+
+  public static void main(String[] args) 
+  {
+    Compteur test = new Compteur(5);
+    while (test.compte<10) 
+    {
+      System.out.println(test.toString());
+      test.plusUn();  
+    }
+  }
+}
diff --git a/DEV2.1/TP2/Date.class b/DEV2.1/TP2/Date.class
new file mode 100644
index 0000000..b676e93
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diff --git a/DEV2.1/TP2/Date.java b/DEV2.1/TP2/Date.java
new file mode 100644
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+++ b/DEV2.1/TP2/Date.java
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+public class Date 
+{
+  private int jour;
+  private int mois;
+  private int annee;
+
+  public Date(int a, int m, int j)
+  {
+    this.jour = j;
+    this.mois = m;
+    this.annee = a;
+  }
+
+  public String lendemain() 
+  {
+    if (this.jour<30) 
+    {
+      return this.annee+"-"+this.mois+"-"+(this.jour+1);  
+    }
+    else
+    {
+      if (this.mois<12) 
+      {
+        return this.annee+"-"+(this.mois+1)+"-1";
+      }
+      else
+      {
+        return (this.annee+1)+"-1-1";
+      }
+    }
+  }
+
+  public String toString() 
+  {
+    return this.annee+"-"+this.mois+"-"+this.jour;
+  }
+
+  public int datecmp(Date other)
+  {
+    if (this.annee==other.annee&&this.mois==other.mois&&this.jour==other.jour) 
+    {
+      return 0; 
+    }
+    else
+    {
+      if (this.annee>other.annee) 
+      {
+        return 1;
+      }
+      else
+      {
+        if (this.mois>other.mois) 
+        {
+          return 1;  
+        }
+        else
+        {
+          if (this.jour>other.jour) 
+          {
+            return 1;  
+          }
+          else
+          {
+            return -1;
+          }
+        }
+      }
+    }
+  } 
+
+  
+
+  public static void main(String[] args) 
+  {
+    Date test = new Date(2023,12,30);
+    System.out.println(test.toString());
+    System.out.println(test.lendemain());
+  }
+}
diff --git a/DEV2.1/TP2/Periode.java b/DEV2.1/TP2/Periode.java
new file mode 100644
index 0000000..a290d31
--- /dev/null
+++ b/DEV2.1/TP2/Periode.java
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+public class Periode 
+{
+  private int jour;
+
+  public Periode(int j)
+  {
+    this.jour = j;
+  }
+
+}