Change structure

structure/Router.java

@@ -0,0 +1,27 @@
+package structure;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+
+public class Router {
+
+	
+	private HashMap<Router,Integer> links=new HashMap<>();
+	
+	public Router() {
+		// TODO Auto-generated constructor stub
+	}
+
+	public void buildLink(Router router, int weight){
+		this.links.put(router, weight);
+		router.addLink(this, weight);
+	}
+	
+	public void addLink(Router router, int weight){
+		this.links.put(router, weight);
+	}
+	
+	public int getWeight(Router router){
+		return this.links.get(router);
+	}
+}