diff --git a/AverageAge.class b/AverageAge.class
deleted file mode 100644
index 57662b6..0000000
--- a/AverageAge.class
+++ /dev/null
Binary files differ
diff --git a/AverageAge.java b/AverageAge.java
deleted file mode 100644
index 1e42ae7..0000000
--- a/AverageAge.java
+++ /dev/null
@@ -1,44 +0,0 @@
-import java.io. *;
-
-public class AverageAge {
-  public static void main(String[] args) {
-  BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
-  try{
-    //1人目のデータ
-    System.out.println("1人目の名前を入力してくだし");
-    String line = reader.readLine();
-    String name1 = line;
-    System.out.println(name1 + "さんの年齢は何歳ですか？");
-    line = reader.readLine();
-    int age1 = Integer.parseInt(line);
-    System.out.println(name1 + "さんの年齢は" + age1 + "歳ですね");
-
-    //2人目のデータ
-    System.out.println("2人目の名前を入力してくだし");    
-    line = reader.readLine();
-    String name2 = line;
-    System.out.println(name2 + "さんの年齢は何歳ですか？");
-    line = reader.readLine();
-    int age2 = Integer.parseInt(line);
-    System.out.println(name2 + "さんの年齢は" + age2 + "歳ですね");
-    double average = ((age1 + age2) / 2.0);
-    System.out.println("・");
-    Thread.sleep(500);
-    System.out.println("・");
-    Thread.sleep(500);
-    System.out.println("・");
-    //2人の年齢平均を求める
-    System.out.println("=================");
-    System.out.println( name1 + "さん" + name2 + "さんの年齢平均は" + average + "です");
-    System.out.println("=================");    
-  }catch(InterruptedException e){
-    e.printStackTrace();
-    }catch (IOException e){
-    System.out.println(e);
-    }catch(NumberFormatException e){
-      System.out.println("正しく入力してください");
-    }
-  }
-}
-
-
diff --git a/DistanceTraveledPerDay.class b/DistanceTraveledPerDay.class
deleted file mode 100644
index 862c957..0000000
--- a/DistanceTraveledPerDay.class
+++ /dev/null
Binary files differ
diff --git a/DistanceTraveledPerDay.java b/DistanceTraveledPerDay.java
deleted file mode 100644
index 6d89c20..0000000
--- a/DistanceTraveledPerDay.java
+++ /dev/null
@@ -1,7 +0,0 @@
-public class DistanceTraveledPerDay {
-  public static void main(String[] args){
-    long speed = (300000L * 60L); /* 分速*/
-    int day = (24 * 60); /* 分 */
-    System.out.println(speed + " × " + day + " = " + (speed * day) + "(m)" + " = " + ((speed * day) / 60 ) + "(km)") ; /* long型が優先される */
-  }
-}
\ No newline at end of file
diff --git a/Fukusyu.class b/Fukusyu.class
deleted file mode 100644
index 9fd321a..0000000
--- a/Fukusyu.class
+++ /dev/null
Binary files differ
diff --git a/HowOldAreYou.class b/HowOldAreYou.class
deleted file mode 100644
index 558f29a..0000000
--- a/HowOldAreYou.class
+++ /dev/null
Binary files differ
diff --git a/HowOldAreYou.java b/HowOldAreYou.java
deleted file mode 100644
index 4099a4a..0000000
--- a/HowOldAreYou.java
+++ /dev/null
@@ -1,20 +0,0 @@
-import java.io. *;
-
-public class HowOldAreYou {
-  public static void main(String[] args){
-    System.out.println("あなたの名前を入力:");
-    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
-    try{
-      String line = reader.readLine();
-      System.out.println(line + "さん。こんにちは。");
-      System.out.println("年齢を入力してください。");
-      line = reader.readLine();
-      int age = Integer.parseInt(line);
-    System.out.println("あなたは" + age + "歳ですか。5年後は" + (age + 5) + "歳ですね。");
-    }catch (IOException e) {
-      System.out.println(e);
-    }catch (NumberFormatException e){
-      System.out.println("年齢が正しくありません。");
-    }
-  }
-}
\ No newline at end of file
diff --git a/HowTallAreYou.class b/HowTallAreYou.class
deleted file mode 100644
index 35031fa..0000000
--- a/HowTallAreYou.class
+++ /dev/null
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diff --git a/HowTallAreYou.java b/HowTallAreYou.java
deleted file mode 100644
index 4f0c9b1..0000000
--- a/HowTallAreYou.java
+++ /dev/null
@@ -1,22 +0,0 @@
-import java.io. *;
-
-public class HowTallAreYou {
-  public static void main(String[] args){
-  System.out.println("あなたの名前を入力してね");
-  BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
-  try{
-    String line = reader.readLine();
-    System.out.println(line + "さん。こんにちは！");
-    System.out.println("あなたの身長は何cmですか？(小数点まで入力してね)");
-    line = reader.readLine();
-    double height = Double.parseDouble(line);
-    System.out.println("ほー!" + height + "cmですか!");
-    int roughHeight = (int)height;
-    System.out.println("ざっくりいうと" + (roughHeight) + "cmですね。");
-  }catch (IOException e){
-    System.out.println(e);
-    }catch (NumberFormatException e){
-      System.out.println("身長が正しくありません。");
-    }
-  }
-}
\ No newline at end of file
diff --git a/Keisan.class b/Keisan.class
deleted file mode 100644
index 1fb36f2..0000000
--- a/Keisan.class
+++ /dev/null
Binary files differ
diff --git a/Keisan.java b/Keisan.java
deleted file mode 100644
index 38a6d7e..0000000
--- a/Keisan.java
+++ /dev/null
@@ -1,12 +0,0 @@
-public class Keisan {
-  public static void main(String[] args){
-      System.out.printf("0x0は %d です%n" , 0 * 0);
-      System.out.printf("1+1は %d です%n" , 1 * 1 );
-      System.out.printf("2x2は %d です%n" , 2 * 2);
-      System.out.printf("3x3は %d です%n" , 3 * 3);
-      System.out.printf("4x4は %d です%n" , 4 * 4);
-      System.out.printf("5x5は %d です%n" , 5 * 5);
-      System.out.printf("台形の面積は %d です%n" , ((2 + 3) * 4) / 2);
-      System.out.printf("10000000 × 10000000 = %d %n" , 10000000L * 10000000L);
-  }
-}
\ No newline at end of file
diff --git a/fukusyu.java b/fukusyu.java
deleted file mode 100644
index 2899b1c..0000000
--- a/fukusyu.java
+++ /dev/null
@@ -1,4 +0,0 @@
-public class Fukusyu {
-  public static void main(String[] args){
-  }
-}
\ No newline at end of file
diff --git a/practice/AverageAge.class b/practice/AverageAge.class
new file mode 100644
index 0000000..57662b6
--- /dev/null
+++ b/practice/AverageAge.class
Binary files differ
diff --git a/practice/AverageAge.java b/practice/AverageAge.java
new file mode 100644
index 0000000..1e42ae7
--- /dev/null
+++ b/practice/AverageAge.java
@@ -0,0 +1,44 @@
+import java.io. *;
+
+public class AverageAge {
+  public static void main(String[] args) {
+  BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
+  try{
+    //1人目のデータ
+    System.out.println("1人目の名前を入力してくだし");
+    String line = reader.readLine();
+    String name1 = line;
+    System.out.println(name1 + "さんの年齢は何歳ですか？");
+    line = reader.readLine();
+    int age1 = Integer.parseInt(line);
+    System.out.println(name1 + "さんの年齢は" + age1 + "歳ですね");
+
+    //2人目のデータ
+    System.out.println("2人目の名前を入力してくだし");    
+    line = reader.readLine();
+    String name2 = line;
+    System.out.println(name2 + "さんの年齢は何歳ですか？");
+    line = reader.readLine();
+    int age2 = Integer.parseInt(line);
+    System.out.println(name2 + "さんの年齢は" + age2 + "歳ですね");
+    double average = ((age1 + age2) / 2.0);
+    System.out.println("・");
+    Thread.sleep(500);
+    System.out.println("・");
+    Thread.sleep(500);
+    System.out.println("・");
+    //2人の年齢平均を求める
+    System.out.println("=================");
+    System.out.println( name1 + "さん" + name2 + "さんの年齢平均は" + average + "です");
+    System.out.println("=================");    
+  }catch(InterruptedException e){
+    e.printStackTrace();
+    }catch (IOException e){
+    System.out.println(e);
+    }catch(NumberFormatException e){
+      System.out.println("正しく入力してください");
+    }
+  }
+}
+
+
diff --git a/practice/DistanceTraveledPerDay.class b/practice/DistanceTraveledPerDay.class
new file mode 100644
index 0000000..862c957
--- /dev/null
+++ b/practice/DistanceTraveledPerDay.class
Binary files differ
diff --git a/practice/DistanceTraveledPerDay.java b/practice/DistanceTraveledPerDay.java
new file mode 100644
index 0000000..6d89c20
--- /dev/null
+++ b/practice/DistanceTraveledPerDay.java
@@ -0,0 +1,7 @@
+public class DistanceTraveledPerDay {
+  public static void main(String[] args){
+    long speed = (300000L * 60L); /* 分速*/
+    int day = (24 * 60); /* 分 */
+    System.out.println(speed + " × " + day + " = " + (speed * day) + "(m)" + " = " + ((speed * day) / 60 ) + "(km)") ; /* long型が優先される */
+  }
+}
\ No newline at end of file
diff --git a/practice/Fukusyu.class b/practice/Fukusyu.class
new file mode 100644
index 0000000..9fd321a
--- /dev/null
+++ b/practice/Fukusyu.class
Binary files differ
diff --git a/practice/HowOldAreYou.class b/practice/HowOldAreYou.class
new file mode 100644
index 0000000..558f29a
--- /dev/null
+++ b/practice/HowOldAreYou.class
Binary files differ
diff --git a/practice/HowOldAreYou.java b/practice/HowOldAreYou.java
new file mode 100644
index 0000000..4099a4a
--- /dev/null
+++ b/practice/HowOldAreYou.java
@@ -0,0 +1,20 @@
+import java.io. *;
+
+public class HowOldAreYou {
+  public static void main(String[] args){
+    System.out.println("あなたの名前を入力:");
+    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
+    try{
+      String line = reader.readLine();
+      System.out.println(line + "さん。こんにちは。");
+      System.out.println("年齢を入力してください。");
+      line = reader.readLine();
+      int age = Integer.parseInt(line);
+    System.out.println("あなたは" + age + "歳ですか。5年後は" + (age + 5) + "歳ですね。");
+    }catch (IOException e) {
+      System.out.println(e);
+    }catch (NumberFormatException e){
+      System.out.println("年齢が正しくありません。");
+    }
+  }
+}
\ No newline at end of file
diff --git a/practice/HowTallAreYou.class b/practice/HowTallAreYou.class
new file mode 100644
index 0000000..35031fa
--- /dev/null
+++ b/practice/HowTallAreYou.class
Binary files differ
diff --git a/practice/HowTallAreYou.java b/practice/HowTallAreYou.java
new file mode 100644
index 0000000..4f0c9b1
--- /dev/null
+++ b/practice/HowTallAreYou.java
@@ -0,0 +1,22 @@
+import java.io. *;
+
+public class HowTallAreYou {
+  public static void main(String[] args){
+  System.out.println("あなたの名前を入力してね");
+  BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
+  try{
+    String line = reader.readLine();
+    System.out.println(line + "さん。こんにちは！");
+    System.out.println("あなたの身長は何cmですか？(小数点まで入力してね)");
+    line = reader.readLine();
+    double height = Double.parseDouble(line);
+    System.out.println("ほー!" + height + "cmですか!");
+    int roughHeight = (int)height;
+    System.out.println("ざっくりいうと" + (roughHeight) + "cmですね。");
+  }catch (IOException e){
+    System.out.println(e);
+    }catch (NumberFormatException e){
+      System.out.println("身長が正しくありません。");
+    }
+  }
+}
\ No newline at end of file
diff --git a/practice/Keisan.class b/practice/Keisan.class
new file mode 100644
index 0000000..1fb36f2
--- /dev/null
+++ b/practice/Keisan.class
Binary files differ
diff --git a/practice/Keisan.java b/practice/Keisan.java
new file mode 100644
index 0000000..38a6d7e
--- /dev/null
+++ b/practice/Keisan.java
@@ -0,0 +1,12 @@
+public class Keisan {
+  public static void main(String[] args){
+      System.out.printf("0x0は %d です%n" , 0 * 0);
+      System.out.printf("1+1は %d です%n" , 1 * 1 );
+      System.out.printf("2x2は %d です%n" , 2 * 2);
+      System.out.printf("3x3は %d です%n" , 3 * 3);
+      System.out.printf("4x4は %d です%n" , 4 * 4);
+      System.out.printf("5x5は %d です%n" , 5 * 5);
+      System.out.printf("台形の面積は %d です%n" , ((2 + 3) * 4) / 2);
+      System.out.printf("10000000 × 10000000 = %d %n" , 10000000L * 10000000L);
+  }
+}
\ No newline at end of file
diff --git a/practice/fukusyu.java b/practice/fukusyu.java
new file mode 100644
index 0000000..2899b1c
--- /dev/null
+++ b/practice/fukusyu.java
@@ -0,0 +1,4 @@
+public class Fukusyu {
+  public static void main(String[] args){
+  }
+}
\ No newline at end of file