Refactoring

* package refactoring
* new matrix implementation (todo)
* new adj list implemetation (todo)
* fixed tests

src/berack96/lib/graph/Edge.java

@@ -0,0 +1,83 @@
+package berack96.lib.graph;
+
+/**
+ * Class used for retrieving the edges of the graph.
+ *
+ * @param <V> the vertices
+ * @param <W> the weight of the edge
+ * @author Berack96
+ */
+public class Edge<V, W extends Number> {
+
+    /**
+     * The source vertex
+     */
+    private final V source;
+    /**
+     * The destination vertex
+     */
+    private final V destination;
+    /**
+     * The weight of this edge
+     */
+    private final W weight;
+
+    /**
+     * Create an final version of this object
+     *
+     * @param source      the source of the edge
+     * @param destination the destination of the edge
+     * @param weight      the weight of the edge
+     */
+    public Edge(V source, V destination, W weight) {
+        this.source = source;
+        this.destination = destination;
+        this.weight = weight;
+    }
+
+    /**
+     * The vertex where the edge goes
+     *
+     * @return the vertex
+     */
+    public V getDestination() {
+        return destination;
+    }
+
+    /**
+     * The vertex where the edge starts from
+     *
+     * @return the vertex
+     */
+    public V getSource() {
+        return source;
+    }
+
+    /**
+     * The weight of the edge
+     *
+     * @return the weight
+     */
+    public W getWeight() {
+        return weight;
+    }
+
+    @Override
+    public String toString() {
+        return "[" + source + " -> " + destination + ", " + weight + "]";
+    }
+
+    @Override
+    public int hashCode() {
+        return toString().hashCode();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        try {
+            return obj.getClass().equals(getClass()) && obj.toString().equals(toString());
+        } catch (Exception e) {
+            return false;
+        }
+    }
+}