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diff --git a/src/Chapter4/centrality/examples/BetweennessCentralityExample.java b/src/Chapter4/centrality/examples/BetweennessCentralityExample.java
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+++ b/src/Chapter4/centrality/examples/BetweennessCentralityExample.java
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+package centrality.examples;
+
+import Chapter4.util.TweetFileToGraph;
+import java.io.File;
+import GraphElements.RetweetEdge;
+import GraphElements.UserNode;
+import edu.uci.ics.jung.algorithms.importance.BetweennessCentrality;
+import edu.uci.ics.jung.graph.DirectedGraph;
+
+public class BetweennessCentralityExample {
+	public static void main(String[] args){
+		
+		File tweetFile;
+		
+		if(args.length > 0){
+			tweetFile = new File(args[0]);
+		}
+		else{
+			tweetFile = new File("synthetic_retweet_network.json");
+		}
+		
+		DirectedGraph<UserNode, RetweetEdge> retweetGraph = TweetFileToGraph.getRetweetNetwork(tweetFile);
+		
+		//calculate the betweenness centrality
+		BetweennessCentrality<UserNode, RetweetEdge> betweenness = new BetweennessCentrality<UserNode, RetweetEdge>(retweetGraph);
+		
+		betweenness.evaluate();
+		betweenness.printRankings(true, true);
+		
+	}
+}