Update.

src/main/org/insa/algo/weakconnectivity/WeaklyConnectedComponentTextObserver.java

@@ -0,0 +1,37 @@
+package org.insa.algo.weakconnectivity;
+
+import java.io.PrintStream;
+import java.util.ArrayList;
+
+import org.insa.graph.Node;
+
+public class WeaklyConnectedComponentTextObserver extends WeaklyConnectedComponentObserver {
+	
+	// Number of the current component.
+	private int numComponent = 1;
+	
+	// Output stream
+	PrintStream stream;
+
+	public WeaklyConnectedComponentTextObserver(PrintStream stream) {
+		super(false);
+		this.stream = stream;
+	}
+
+	@Override
+	public void notifyStartComponent(Node curNode) {
+		stream.print("Entering component #" + numComponent + " from node #" + curNode.getId() + "... ");
+	}
+
+	@Override
+	public void notifyNewNodeInComponent(Node node) {
+	}
+
+	@Override
+	public void notifyEndComponent(ArrayList<Node> nodes) {
+		stream.println(nodes.size() + " nodes found.");
+		stream.flush();
+		numComponent += 1;
+	}
+
+}