diff --git a/java-learning/src/jp/co/jid/collectionSample/GradesData01.java b/java-learning/src/jp/co/jid/collectionSample/GradesData01.java
deleted file mode 100644
index 168d7c5..0000000
--- a/java-learning/src/jp/co/jid/collectionSample/GradesData01.java
+++ /dev/null
@@ -1,33 +0,0 @@
-package jp.co.jid.collectionSample;
-
-import java.util.HashMap;
-
-public class GradesData01 {
-
-	public static void main(String[] args) {
-		// 01の解答
-		System.out.println("-- 【演習⑨】01 --");
-		HashMap<String, Integer> map = new HashMap<String, Integer>();
-		Data01 data01 = new Data01();
-		String[] nameArray = data01.getNames();
-		int[] pointArray = data01.getPoints();
-		for (int i = 0; i < nameArray.length; i++) {
-			map.put(nameArray[i], Integer.valueOf(pointArray[i]));
-		}
-		for (String name : map.keySet()) {
-			System.out.println(name + " : " + map.get(name));
-		}
-
-		// 02の解答
-		System.out.println("-- 【演習⑨】02 --");
-		int sum = 0;
-		double avg = 0;
-		for (Integer point : map.values()) {
-			sum += point.intValue();
-		}
-		avg = (double)sum / map.size();
-		System.out.println("合計得点は" + sum);
-		System.out.println("平均得点は" + avg);
-	}
-
-}

diff --git a/java-learning/src/jp/co/jid/collectionSample/GradesData01.java b/java-learning/src/jp/co/jid/collectionSample/GradesData01.java
deleted file mode 100644
index 168d7c5..0000000
--- a/java-learning/src/jp/co/jid/collectionSample/GradesData01.java
+++ /dev/null
@@ -1,33 +0,0 @@
-package jp.co.jid.collectionSample;
-
-import java.util.HashMap;
-
-public class GradesData01 {
-
-	public static void main(String[] args) {
-		// 01の解答
-		System.out.println("-- 【演習⑨】01 --");
-		HashMap<String, Integer> map = new HashMap<String, Integer>();
-		Data01 data01 = new Data01();
-		String[] nameArray = data01.getNames();
-		int[] pointArray = data01.getPoints();
-		for (int i = 0; i < nameArray.length; i++) {
-			map.put(nameArray[i], Integer.valueOf(pointArray[i]));
-		}
-		for (String name : map.keySet()) {
-			System.out.println(name + " : " + map.get(name));
-		}
-
-		// 02の解答
-		System.out.println("-- 【演習⑨】02 --");
-		int sum = 0;
-		double avg = 0;
-		for (Integer point : map.values()) {
-			sum += point.intValue();
-		}
-		avg = (double)sum / map.size();
-		System.out.println("合計得点は" + sum);
-		System.out.println("平均得点は" + avg);
-	}
-
-}
diff --git a/java-learning/src/jp/co/jid/collectionSample/GradesData02.java b/java-learning/src/jp/co/jid/collectionSample/GradesData02.java
deleted file mode 100644
index 26b2b79..0000000
--- a/java-learning/src/jp/co/jid/collectionSample/GradesData02.java
+++ /dev/null
@@ -1,47 +0,0 @@
-package jp.co.jid.collectionSample;
-
-import java.util.HashMap;
-import java.util.LinkedHashMap;
-
-public class GradesData02 {
-
-	public static void main(String[] args) {
-		// 01の解答
-		System.out.println("-- 【演習⑩】01 --");
-		HashMap<String, Integer> map1 = new HashMap<String, Integer>();
-		Data02 data02 = new Data02();
-		String[] nameArray = data02.getNames();
-		int[] pointArray = data02.getPoints();
-		for (int i = 0; i < nameArray.length; i++) {
-			String name = nameArray[i];
-			if (!map1.containsKey(name) || map1.get(name).intValue() < pointArray[i]) {
-				// まだ受講結果がない、もしくは受講結果があっても過去の得点が低い場合
-				map1.put(name, Integer.valueOf(pointArray[i]));
-			}
-		}
-		for (String name : map1.keySet()) {
-			System.out.println(name + " : " + map1.get(name));
-		}
-
-		// 02の解答
-		System.out.println("-- 【演習⑩】02 --");
-		LinkedHashMap<String, Integer> map2 = new LinkedHashMap<String, Integer>();
-		while (!map1.isEmpty()) {
-			String maxPointerName = "";
-			Integer maxPoint = Integer.valueOf(0);
-			for (String name : map1.keySet()) {
-				Integer point = map1.get(name);
-				if (point.intValue() >= maxPoint) {
-					maxPointerName = name;
-					maxPoint = point;
-				}
-			}
-			map2.put(maxPointerName, maxPoint);
-			map1.remove(maxPointerName);
-		}
-		for (String name : map2.keySet()) {
-			System.out.println(name + " : " + map2.get(name));
-		}
-	}
-
-}

diff --git a/java-learning/src/jp/co/jid/collectionSample/GradesData01.java b/java-learning/src/jp/co/jid/collectionSample/GradesData01.java
deleted file mode 100644
index 168d7c5..0000000
--- a/java-learning/src/jp/co/jid/collectionSample/GradesData01.java
+++ /dev/null
@@ -1,33 +0,0 @@
-package jp.co.jid.collectionSample;
-
-import java.util.HashMap;
-
-public class GradesData01 {
-
-	public static void main(String[] args) {
-		// 01の解答
-		System.out.println("-- 【演習⑨】01 --");
-		HashMap<String, Integer> map = new HashMap<String, Integer>();
-		Data01 data01 = new Data01();
-		String[] nameArray = data01.getNames();
-		int[] pointArray = data01.getPoints();
-		for (int i = 0; i < nameArray.length; i++) {
-			map.put(nameArray[i], Integer.valueOf(pointArray[i]));
-		}
-		for (String name : map.keySet()) {
-			System.out.println(name + " : " + map.get(name));
-		}
-
-		// 02の解答
-		System.out.println("-- 【演習⑨】02 --");
-		int sum = 0;
-		double avg = 0;
-		for (Integer point : map.values()) {
-			sum += point.intValue();
-		}
-		avg = (double)sum / map.size();
-		System.out.println("合計得点は" + sum);
-		System.out.println("平均得点は" + avg);
-	}
-
-}
diff --git a/java-learning/src/jp/co/jid/collectionSample/GradesData02.java b/java-learning/src/jp/co/jid/collectionSample/GradesData02.java
deleted file mode 100644
index 26b2b79..0000000
--- a/java-learning/src/jp/co/jid/collectionSample/GradesData02.java
+++ /dev/null
@@ -1,47 +0,0 @@
-package jp.co.jid.collectionSample;
-
-import java.util.HashMap;
-import java.util.LinkedHashMap;
-
-public class GradesData02 {
-
-	public static void main(String[] args) {
-		// 01の解答
-		System.out.println("-- 【演習⑩】01 --");
-		HashMap<String, Integer> map1 = new HashMap<String, Integer>();
-		Data02 data02 = new Data02();
-		String[] nameArray = data02.getNames();
-		int[] pointArray = data02.getPoints();
-		for (int i = 0; i < nameArray.length; i++) {
-			String name = nameArray[i];
-			if (!map1.containsKey(name) || map1.get(name).intValue() < pointArray[i]) {
-				// まだ受講結果がない、もしくは受講結果があっても過去の得点が低い場合
-				map1.put(name, Integer.valueOf(pointArray[i]));
-			}
-		}
-		for (String name : map1.keySet()) {
-			System.out.println(name + " : " + map1.get(name));
-		}
-
-		// 02の解答
-		System.out.println("-- 【演習⑩】02 --");
-		LinkedHashMap<String, Integer> map2 = new LinkedHashMap<String, Integer>();
-		while (!map1.isEmpty()) {
-			String maxPointerName = "";
-			Integer maxPoint = Integer.valueOf(0);
-			for (String name : map1.keySet()) {
-				Integer point = map1.get(name);
-				if (point.intValue() >= maxPoint) {
-					maxPointerName = name;
-					maxPoint = point;
-				}
-			}
-			map2.put(maxPointerName, maxPoint);
-			map1.remove(maxPointerName);
-		}
-		for (String name : map2.keySet()) {
-			System.out.println(name + " : " + map2.get(name));
-		}
-	}
-
-}
diff --git a/java-learning/src/jp/co/jid/collectionSample/GradesData03.java b/java-learning/src/jp/co/jid/collectionSample/GradesData03.java
deleted file mode 100644
index 60f198d..0000000
--- a/java-learning/src/jp/co/jid/collectionSample/GradesData03.java
+++ /dev/null
@@ -1,43 +0,0 @@
-package jp.co.jid.collectionSample;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-
-public class GradesData03 {
-
-	public static void main(String[] args) {
-		// 03の解答
-		System.out.println("-- 【演習⑩】03 --");
-		Data02 data02 = new Data02();
-		String[] nameArray = data02.getNames();
-		int[] pointArray = data02.getPoints();
-//		HashMap<String, ArrayList<Integer>> map = new HashMap<String, ArrayList<Integer>>();
-//		for (int i = 0; i < nameArray.length; i++) {
-//			String name = nameArray[i];
-//			if (!map.containsKey(name)) {
-//				map.put(name, new ArrayList<Integer>());
-//			}
-//			map.get(name).add(Integer.valueOf(pointArray[i]));
-//		}
-//		for (String name : map.keySet()) {
-//			System.out.println(name + " : " + map.get(name));
-//		}
-
-		HashMap<String, ArrayList<Integer>> map2 = new HashMap<String, ArrayList<Integer>>();
-		for (int i = 0; i < nameArray.length; i++) {
-			if (!map2.containsKey(nameArray[i])) {
-				ArrayList<Integer> list = new ArrayList<Integer>();
-				for (int j = 0; j < nameArray.length; j++) {
-					if (nameArray[i].equals(nameArray[j])) {
-						list.add(pointArray[j]);
-					}
-				}
-				map2.put(nameArray[i], list);
-			}
-		}
-		for (String name : map2.keySet()) {
-			System.out.println(name + " : " + map2.get(name));
-		}
-	}
-
-}

diff --git a/java-learning/src/jp/co/jid/collectionSample/GradesData01.java b/java-learning/src/jp/co/jid/collectionSample/GradesData01.java
deleted file mode 100644
index 168d7c5..0000000
--- a/java-learning/src/jp/co/jid/collectionSample/GradesData01.java
+++ /dev/null
@@ -1,33 +0,0 @@
-package jp.co.jid.collectionSample;
-
-import java.util.HashMap;
-
-public class GradesData01 {
-
-	public static void main(String[] args) {
-		// 01の解答
-		System.out.println("-- 【演習⑨】01 --");
-		HashMap<String, Integer> map = new HashMap<String, Integer>();
-		Data01 data01 = new Data01();
-		String[] nameArray = data01.getNames();
-		int[] pointArray = data01.getPoints();
-		for (int i = 0; i < nameArray.length; i++) {
-			map.put(nameArray[i], Integer.valueOf(pointArray[i]));
-		}
-		for (String name : map.keySet()) {
-			System.out.println(name + " : " + map.get(name));
-		}
-
-		// 02の解答
-		System.out.println("-- 【演習⑨】02 --");
-		int sum = 0;
-		double avg = 0;
-		for (Integer point : map.values()) {
-			sum += point.intValue();
-		}
-		avg = (double)sum / map.size();
-		System.out.println("合計得点は" + sum);
-		System.out.println("平均得点は" + avg);
-	}
-
-}
diff --git a/java-learning/src/jp/co/jid/collectionSample/GradesData02.java b/java-learning/src/jp/co/jid/collectionSample/GradesData02.java
deleted file mode 100644
index 26b2b79..0000000
--- a/java-learning/src/jp/co/jid/collectionSample/GradesData02.java
+++ /dev/null
@@ -1,47 +0,0 @@
-package jp.co.jid.collectionSample;
-
-import java.util.HashMap;
-import java.util.LinkedHashMap;
-
-public class GradesData02 {
-
-	public static void main(String[] args) {
-		// 01の解答
-		System.out.println("-- 【演習⑩】01 --");
-		HashMap<String, Integer> map1 = new HashMap<String, Integer>();
-		Data02 data02 = new Data02();
-		String[] nameArray = data02.getNames();
-		int[] pointArray = data02.getPoints();
-		for (int i = 0; i < nameArray.length; i++) {
-			String name = nameArray[i];
-			if (!map1.containsKey(name) || map1.get(name).intValue() < pointArray[i]) {
-				// まだ受講結果がない、もしくは受講結果があっても過去の得点が低い場合
-				map1.put(name, Integer.valueOf(pointArray[i]));
-			}
-		}
-		for (String name : map1.keySet()) {
-			System.out.println(name + " : " + map1.get(name));
-		}
-
-		// 02の解答
-		System.out.println("-- 【演習⑩】02 --");
-		LinkedHashMap<String, Integer> map2 = new LinkedHashMap<String, Integer>();
-		while (!map1.isEmpty()) {
-			String maxPointerName = "";
-			Integer maxPoint = Integer.valueOf(0);
-			for (String name : map1.keySet()) {
-				Integer point = map1.get(name);
-				if (point.intValue() >= maxPoint) {
-					maxPointerName = name;
-					maxPoint = point;
-				}
-			}
-			map2.put(maxPointerName, maxPoint);
-			map1.remove(maxPointerName);
-		}
-		for (String name : map2.keySet()) {
-			System.out.println(name + " : " + map2.get(name));
-		}
-	}
-
-}
diff --git a/java-learning/src/jp/co/jid/collectionSample/GradesData03.java b/java-learning/src/jp/co/jid/collectionSample/GradesData03.java
deleted file mode 100644
index 60f198d..0000000
--- a/java-learning/src/jp/co/jid/collectionSample/GradesData03.java
+++ /dev/null
@@ -1,43 +0,0 @@
-package jp.co.jid.collectionSample;
-
-import java.util.ArrayList;
-import java.util.HashMap;
-
-public class GradesData03 {
-
-	public static void main(String[] args) {
-		// 03の解答
-		System.out.println("-- 【演習⑩】03 --");
-		Data02 data02 = new Data02();
-		String[] nameArray = data02.getNames();
-		int[] pointArray = data02.getPoints();
-//		HashMap<String, ArrayList<Integer>> map = new HashMap<String, ArrayList<Integer>>();
-//		for (int i = 0; i < nameArray.length; i++) {
-//			String name = nameArray[i];
-//			if (!map.containsKey(name)) {
-//				map.put(name, new ArrayList<Integer>());
-//			}
-//			map.get(name).add(Integer.valueOf(pointArray[i]));
-//		}
-//		for (String name : map.keySet()) {
-//			System.out.println(name + " : " + map.get(name));
-//		}
-
-		HashMap<String, ArrayList<Integer>> map2 = new HashMap<String, ArrayList<Integer>>();
-		for (int i = 0; i < nameArray.length; i++) {
-			if (!map2.containsKey(nameArray[i])) {
-				ArrayList<Integer> list = new ArrayList<Integer>();
-				for (int j = 0; j < nameArray.length; j++) {
-					if (nameArray[i].equals(nameArray[j])) {
-						list.add(pointArray[j]);
-					}
-				}
-				map2.put(nameArray[i], list);
-			}
-		}
-		for (String name : map2.keySet()) {
-			System.out.println(name + " : " + map2.get(name));
-		}
-	}
-
-}
diff --git a/java-learning/src/jp/co/jid/collectionSample/StringCount.java b/java-learning/src/jp/co/jid/collectionSample/StringCount.java
deleted file mode 100644
index 3e434ac..0000000
--- a/java-learning/src/jp/co/jid/collectionSample/StringCount.java
+++ /dev/null
@@ -1,30 +0,0 @@
-package jp.co.jid.collectionSample;
-
-import java.util.TreeMap;
-
-public class StringCount {
-
-	public static void main(String[] args) {
-		System.out.println("-- 演習⑪ --");
-		// キーボードから文字を入力
-		String inputStr = InputUtil.input();
-
-		// 文字列を１文字ずつに分割
-		String[] inputStrList = inputStr.split("");
-
-		// 分割した文字を登録しながらカウントアップ
-		TreeMap<String, Integer> map = new TreeMap<String, Integer>();
-		for (String str : inputStrList) {
-			if (!map.containsKey(str)) {
-				map.put(str, Integer.valueOf(0));
-			}
-			map.put(str, Integer.valueOf(map.get(str).intValue() + 1));
-		}
-
-		// 表示処理
-		for (String str : map.keySet()) {
-			System.out.println(str + ":" + map.get(str).intValue() + "回");
-		}
-	}
-
-}