--- a/src/main/java/jp/ac/u_ryukyu/ie/cr/tatsuki/jungle/test/FJTreeMapGetIteratorThread.java	Sun Mar 29 23:29:27 2015 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/tatsuki/jungle/test/FJTreeMapGetIteratorThread.java	Mon Mar 30 00:49:19 2015 +0900
@@ -1,11 +1,9 @@
 package jp.ac.u_ryukyu.ie.cr.tatsuki.jungle.test;
 
-
-import fj.P2;
-import fj.data.Option;
-import fj.data.TreeMap;
+import jp.ac.u_ryukyu.ie.cr.tatsuki.TreeMap.TreeMap;
 
 import java.util.Iterator;
+import java.util.Optional;
 
 
 /**
@@ -34,11 +32,9 @@
     @Override
     public void run() {
         while (loop) {
-            Iterator<P2<String, String>> it = map.iterator();
-            for (; it.hasNext(); ) {
-                if (it.next()._2().equals("50"))
+           Optional<String> value  = map.getLoop("50");
+                if (value.isPresent())
                     findCount++;
-            }
         }
     }
 }

--- a/src/main/java/jp/ac/u_ryukyu/ie/cr/tatsuki/jungle/test/TreeMapBenchMark.java	Sun Mar 29 23:29:27 2015 +0900
+++ b/src/main/java/jp/ac/u_ryukyu/ie/cr/tatsuki/jungle/test/TreeMapBenchMark.java	Mon Mar 30 00:49:19 2015 +0900
@@ -30,25 +30,31 @@
 
         AbstractTreeMapThread readThread[] = null;
 
-        TreeMap<String, String> map = TreeMap.empty(Ord.stringOrd);
         List<String> list = List.nil();
         if (args[0].equals("list")) {
             for (int count = 0 ;count < 100 ; count++) {
                 list = list.cons(String.valueOf(count));
             }
         }
-        for (int count = 0 ;count < 1000 ; count++) {
-            map = map.set(String.valueOf(count), String.valueOf(count));
-        }
+
         for (int THREAD_COUNT = 1; THREAD_COUNT <= cpuNum; THREAD_COUNT++) {
 
                 readThread = new AbstractTreeMapThread[THREAD_COUNT];
 
-                if (args[0].equals("getLoop")) {
+                if (args[0].equals("fj")) {
+                    TreeMap<String, String> map = TreeMap.empty(Ord.stringOrd);
+                    for (int count = 0 ;count < 1000 ; count++) {
+                        map = map.set(String.valueOf(count), String.valueOf(count));
+                    }
                     for (int count = 0; THREAD_COUNT > count; count++) {
                         readThread[count] = new FJTreeMapGetLoopThread(map);
                     }
-                } else if (args[0].equals("get")) {
+                } else if (args[0].equals("tatsuki")) {
+                    jp.ac.u_ryukyu.ie.cr.tatsuki.TreeMap.TreeMap map = new jp.ac.u_ryukyu.ie.cr.tatsuki.TreeMap.TreeMap();
+                    for (int count = 0 ;count < 1000 ; count++) {
+                        map = map.put(String.valueOf(count), String.valueOf(count));
+                    }
+
                     for (int count = 0; THREAD_COUNT > count; count++) {
                         readThread[count] = new FJTreeMapGetIteratorThread(map);
                     }