X-Git-Url: https://git.piment-noir.org/?a=blobdiff_plain;f=src%2FWeight.java;h=47547ba4f524711c42a3bc1c3e561fec0be48853;hb=b974e749af3a4b2df3737b2d361233c704dcc4d8;hp=3f2a829163130f8bba5c5ed1e22e5fdd0fa916c3;hpb=9749119587561f5848349b7a1b9e7d9342944f0d;p=Persons_Comparator.git

diff --git a/src/Weight.java b/src/Weight.java
index 3f2a829..47547ba 100644
--- a/src/Weight.java
+++ b/src/Weight.java
@@ -1,6 +1,9 @@
-public class Weight {
+public class Weight implements Comparable<Weight> {
     private int weight;
 
+    Weight() {
+    }
+
     Weight(int weight) {
         setWeight(weight);
     }
@@ -12,10 +15,21 @@ public class Weight {
     public void setWeight(int weight) {
         if (validateWeight(weight)) {
             this.weight = weight;
-        } /* FIXME: raise an error */
+        } else {
+            throw new IllegalArgumentException("Weight cannot be negative or zero");
+        }
     }
 
     private boolean validateWeight(int weight) {
         return (weight > 0);
     }
+
+    @Override
+    public int compareTo(Weight weight) {
+        int distance = weight.weight - this.getWeight();
+        if (distance >= 0)
+            return distance;
+        else
+            return -distance;
+    }
 }