Update of exercises

sources/src/main/java/pr2/object/equals_hashcode/Wesen.java

@@ -26,4 +26,41 @@ public class Wesen {
         this.staerke = staerke;
     }
 
+    /**
+     * @see java.lang.Object#hashCode()
+     */
+    @Override
+    public int hashCode() {
+        final int prime = 31;
+        int result = 1;
+        result = prime * result + ((name == null) ? 0 : name.hashCode());
+        result = prime * result + staerke;
+        return result;
+    }
+
+    /**
+     * @see java.lang.Object#equals(java.lang.Object)
+     */
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        Wesen other = (Wesen) obj;
+        if (name == null) {
+            if (other.name != null) {
+                return false;
+            }
+        }
+        else if (!name.equals(other.name)) {
+            return false;
+        }
+        return staerke == other.staerke;
+    }
 }