Index: lutinutil/src/java/org/codelutin/util/VersionNumber.java
diff -u lutinutil/src/java/org/codelutin/util/VersionNumber.java:1.2 lutinutil/src/java/org/codelutin/util/VersionNumber.java:1.3
--- lutinutil/src/java/org/codelutin/util/VersionNumber.java:1.2	Fri Jan  4 09:49:47 2008
+++ lutinutil/src/java/org/codelutin/util/VersionNumber.java	Sat Jan  5 16:05:21 2008
@@ -18,6 +18,8 @@
 * ##% */
 package org.codelutin.util;
 
+import java.util.Arrays;
+
 /**
  * A class to represent an application version
  *
@@ -38,6 +40,13 @@
         return numbers;
     }
 
+    public int getNumber(int level) {
+        if (level<0 || level>=numbers.length) {
+            throw new IllegalArgumentException("not a valid level "+level+ " for the VersionNumber "+this);
+        }
+        return numbers[level];
+    }
+
     public int getNbComponents() {
         return numbers.length;
     }
@@ -59,4 +68,19 @@
         }
         return VersionNumberUtil.greaterThan(str, ostr) ? 1 : -1;
     }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof VersionNumber)) return false;
+
+        VersionNumber that = (VersionNumber) o;
+        return Arrays.equals(numbers, that.numbers);
+
+    }
+
+    @Override
+    public int hashCode() {
+        return Arrays.hashCode(numbers);
+    }
 }