diff --git a/src/myLibrary/Position.java b/src/myLibrary/Position.java
index 8b80aaa..fbff896 100644
--- a/src/myLibrary/Position.java
+++ b/src/myLibrary/Position.java
@@ -1,5 +1,11 @@
 package myLibrary;
 
+/**
+ * 2,3次元座標を管理するクラス
+ *
+ * @author s.iwatani
+ * @param <T> 数値型
+ */
 public class Position<T extends Number> implements Cloneable {
     public T x, y, z;
 
@@ -9,18 +15,39 @@
         z = null;
     }
 
-    public Position(T val1, T val2) {
-        x = val1;
-        y = val2;
+    /**
+     * コンストラクタ
+     *
+     * @author s.iwatani
+     * @param x x座標
+     * @param y y座標
+     */
+    public Position(T x, T y) {
+        this.x = x;
+        this.y = y;
         z = null;
     }
 
-    public Position(T val1, T val2, T val3) {
-        x = val1;
-        y = val2;
-        z = val3;
+    /**
+     * コンストラクタ
+     *
+     * @author s.iwatani
+     * @param x x座標
+     * @param y y座標
+     * @param z z座標
+     */
+    public Position(T x, T y, T z) {
+        this.x = x;
+        this.y = y;
+        this.z = z;
     }
 
+    /**
+     * 2つのPositionを入れ替える
+     *
+     * @author s.iwatani
+     * @param t position
+     */
     // TODO: 動作確認
     public void swap(Position<T> t){
         Position<T> tmp = this.clone();
@@ -30,6 +57,12 @@
         t = tmp;
     }
 
+    /**
+     * clone
+     *
+     * @author s.iwatani
+     * @return 新しいPosition
+     */
     // TODO: 動作確認
     @SuppressWarnings("unchecked")
     @Override