diff --git a/src/org/ntlab/deltaViewer/MagnetRONFrame.java b/src/org/ntlab/deltaViewer/MagnetRONFrame.java
index 2085f29..db60dfa 100644
--- a/src/org/ntlab/deltaViewer/MagnetRONFrame.java
+++ b/src/org/ntlab/deltaViewer/MagnetRONFrame.java
@@ -28,32 +28,81 @@
 	protected static final String CONTAINER_COMPONENT = "Container-Component";
 	protected static final String CONTAINER_COMPONENT_COLLECTION = "Container-Component(Collection)";
 	protected static final String THIS_ANOTHER = "This-Another";
-
-	private DeltaViewer viewer = null;
-
+	
 	private static Dimension DEFAULT_SIZE = new Dimension(1300, 700);
 	private static String WINDOW_TITLE = "Delta Viewer";
 
+	private TraceJSON trace = null;
+	private DeltaExtractorJSON s = null;
+
+	private CollaborationViewer viewer = null;
+
+	private Map<String, String[]> argsMap = new HashMap<>();
+
 	public MagnetRONFrame() throws HeadlessException {
 		super(WINDOW_TITLE);
 		setSize(DEFAULT_SIZE);
 		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 		setLayout(new BorderLayout());
-		this.viewer = new DeltaViewer();
+		this.viewer = new CollaborationViewer();
 		getContentPane().add(viewer, BorderLayout.CENTER);
 		pack();
 	}
 
 	public void startAnimation() {
-		Map.Entry<ExtractedStructure, IAliasCollector> extracted = extract();
+		// Change Here!
+		setArgmentsForDeltaExtract(argsMap);
+		//���o�������f���^�̈������i�[����Map��key
+//		String argsKey = "ArgoUMLSelect";
+//		String argsKey = "ArgoUMLDelete1";
+//		String argsKey = "JHotDrawTransform";
+//		String argsKey = "JHotDrawSelect3";
+//		String argsKey = "sampleArray";
+//		String argsKey = "sampleCollection";
+//		String argsKey = "sampleCreate";
+//		String argsKey = "sampleStatic";
+//		String argsKey = "delta_eg1";
+//		String argsKey = "pre_Exp1";
+		String argsKey1 = "getterOverlap1";
+		String argsKey2 = "getterOverlap2";
+//		String argsKey = "setterOverlap1";
+//		String argsKey = "worstCase";
+//		String argsKey = "sample1";
+//		String argsKey = "objTrace5";
+		List<String> keys = new ArrayList<String>();
+		keys.add(argsKey2);
+		keys.add(argsKey1);
+		Map.Entry<IObjectCallGraph, IAliasCollector> extracted = extractMulti(keys);
 		new Thread() {
 			public void run() {
 				startDeltaViewer(extracted.getKey(), extracted.getValue());						
 			}
 		}.start();
 	}
+	
+	public Map.Entry<IObjectCallGraph, IAliasCollector> extractMulti(List<String> keys) {
+		CollaborationObjectCallGraph cocg = null;
+		CollaborationAliasCollector cac = null;
+		trace = new TraceJSON(argsMap.get(keys.get(0))[4]);
+		s = new DeltaExtractorJSON(trace);
 
-	public Map.Entry<ExtractedStructure, IAliasCollector> extract() {
+		for(String key: keys) {
+			Map.Entry<ExtractedStructure, IAliasCollector> extracted = extract(key);
+			if (cocg == null) {
+				cocg = new CollaborationObjectCallGraph(extracted.getKey());
+			} else {
+				cocg.merge(extracted.getKey());
+			}
+			if (cac == null) {
+				cac = new CollaborationAliasCollector(extracted.getValue());
+			} else {
+				cac.merge(extracted.getValue());
+			}
+		}
+		return new AbstractMap.SimpleEntry<IObjectCallGraph, IAliasCollector>(cocg, cac);
+	}
+
+	public Map.Entry<ExtractedStructure, IAliasCollector> extract(String argsKey) {
 //		DeltaExtractorJSON dex = new DeltaExtractorJSON(trace);
 //		HashMap<String, ThreadInstance> threads = trace.getAllThreads();
 //		ThreadInstance thread = threads.values().iterator().next(); // �Ō�̃X���b�h�����Ă��邾���c
@@ -133,29 +182,7 @@
 //			}
 //		}
 
-		// Change Here!
-		Map<String, String[]> argsMap = new HashMap<>();
-		setArgmentsForDeltaExtract(argsMap);
-		//���o�������f���^�̈������i�[����Map��key
-//		String argsKey = "ArgoUMLSelect";
-//		String argsKey = "ArgoUMLDelete1";
-//		String argsKey = "JHotDrawTransform";
-//		String argsKey = "JHotDrawSelect3";
-//		String argsKey = "sampleArray";
-//		String argsKey = "sampleCollection";
-//		String argsKey = "sampleCreate";
-//		String argsKey = "sampleStatic";
-//		String argsKey = "delta_eg1";
-		String argsKey = "pre_Exp1";
-//		String argsKey = "getterOverlap1";
-//		String argsKey = "setterOverlap1";
-//		String argsKey = "worstCase";
-//		String argsKey = "sample1";
-//		String argsKey = "objTrace5";
-
 		long time = System.nanoTime();
-		TraceJSON trace = new TraceJSON(argsMap.get(argsKey)[4]);
-		DeltaExtractorJSON s = new DeltaExtractorJSON(trace);
 		if (argsMap.get(argsKey)[5] == CONTAINER_COMPONENT || argsMap.get(argsKey)[5] == CONTAINER_COMPONENT_COLLECTION) {
 			HashMap<String, ThreadInstance> threads = trace.getAllThreads();
 
@@ -204,18 +231,18 @@
 		}
 	}
 
-	public void startDeltaViewer(ExtractedStructure e, IAliasCollector dac) {
+	public void startDeltaViewer(IObjectCallGraph ocg, IAliasCollector ac) {
 		// Build a frame, create a graph, and add the graph to the frame so you can actually see the graph.
-		if(e != null) {
-			List<Reference> srcSide = e.getDelta().getSrcSide();
-			List<Reference> dstSide = e.getDelta().getDstSide();
-			if (srcSide.size() >= 1 && dstSide.size() >= 1) {
-				WINDOW_TITLE = "extract delta of:" + e.getDelta().getSrcSide().get(0).getDstClassName() + "(" + e.getDelta().getSrcSide().get(0).getDstObjectId() + ")" + " -> " + e.getDelta().getDstSide().get(0).getDstClassName()  + "(" + e.getDelta().getDstSide().get(0).getDstObjectId() + ")";
-				setTitle(WINDOW_TITLE);			
-			}
+		if (ocg != null) {
+			List<TracePoint> relatedPoints = ocg.getRelatedPoints();
+			TracePoint lastRP = relatedPoints.get(relatedPoints.size() - 1);
+			Map.Entry<Reference, String> rpInf = MagnetRONViewer.getRelatedInformation(lastRP);
+			WINDOW_TITLE = "extract delta of:" + rpInf.getKey().getSrcClassName() + "(" + rpInf.getKey().getSrcObjectId() + ")" + " -> " + rpInf.getKey().getDstClassName()+ "(" + rpInf.getKey().getDstObjectId()+ ")";
+			setTitle(WINDOW_TITLE);			
 		}
-		viewer.init(e, dac);
-		List<Alias> aliasList = new ArrayList<>(dac.getAliasList());
+		
+		viewer.init(ocg, ac, new CollaborationLayout());
+		List<Alias> aliasList = new ArrayList<>(ac.getAliasList());
 
 //		dv.setCoordinatorPoint(1200, 100);
 		viewer.initAnimation();
@@ -254,7 +281,7 @@
 		String[] pre_Exp6 = {null, null, "E","C", "traces/pre_Exp6.txt", CONTAINER_COMPONENT_COLLECTION}; map.put("pre_Exp6", pre_Exp6);
 		String[] pre_Exp7 = {null, null, "E","C", "traces/pre_Exp7.txt", CONTAINER_COMPONENT_COLLECTION}; map.put("pre_Exp7", pre_Exp7);
 
-		// Samples of Plural Delta
+		// Samples of Multiple Deltas
 		String[] getterOverlap1 = {null, null, "getterOverlap.F","getterOverlap.D", "traces/getterOverlap.txt", CONTAINER_COMPONENT_COLLECTION}; map.put("getterOverlap1", getterOverlap1);
 		String[] getterOverlap2 = {null, null, "getterOverlap.G","getterOverlap.D", "traces/getterOverlap.txt", CONTAINER_COMPONENT_COLLECTION}; map.put("getterOverlap2", getterOverlap2);
 		String[] setterOverlap1 = {null, null, "setterOverlap.F","setterOverlap.C", "traces/setterOverlap.txt", CONTAINER_COMPONENT_COLLECTION}; map.put("setterOverlap1", setterOverlap1);