diff --git a/src/main/java/org/ntlab/acanthus_server/entities/Position.java b/src/main/java/org/ntlab/acanthus_server/entities/Position.java
index 6ba3e62..d1c638d 100644
--- a/src/main/java/org/ntlab/acanthus_server/entities/Position.java
+++ b/src/main/java/org/ntlab/acanthus_server/entities/Position.java
@@ -7,17 +7,19 @@
 import java.util.UUID;
 
 public class Position {
-    private HashMap<String, Integer> positionMap = new HashMap<>();
-    private ArrayList<HashMap<String, Integer>> positionList = new ArrayList<>();
+    private float x;
+    private float y;
 
-    public void putPosition(Integer x, Integer y) {
-        this.positionMap.put("x", x);
-        this.positionMap.put("y", y);
-        this.positionList.add(this.positionMap);
+    public float getX() {
+        return x;
+    }
+    public float getY() {
+        return y;
     }
 
-    public ArrayList<HashMap<String, Integer>> getPosition() {
-        return this.positionList;
+    public void setXY(float x, float y) {
+        this.x = x;
+        this.y = y;
     }
 
 }
diff --git a/src/main/java/org/ntlab/acanthus_server/resources/gallery/StrokesRest.java b/src/main/java/org/ntlab/acanthus_server/resources/gallery/StrokesRest.java
index e8bef76..c0cb115 100644
--- a/src/main/java/org/ntlab/acanthus_server/resources/gallery/StrokesRest.java
+++ b/src/main/java/org/ntlab/acanthus_server/resources/gallery/StrokesRest.java
@@ -16,6 +16,7 @@
 @Path("/gallery")
 public class StrokesRest {
     private Position Position = new Position();
+    private ArrayList<Position> positions = new ArrayList<>();
     private Stroke Test = new Stroke();
 
     /*
@@ -61,8 +62,8 @@
     @Path("/{aid}/pageMap/0/layers/0/strokes/{strokeNo}/position")
     @GET
     @Produces(MediaType.APPLICATION_JSON)
-    public ArrayList<HashMap<String, Integer>> getPositions(@PathParam("aid") Integer aid, @PathParam("strokeNo") Integer strokeNo) {
-        return this.Position.getPosition();
+    public ArrayList<Position> getPositions(@PathParam("aid") Integer aid, @PathParam("strokeNo") Integer strokeNo) {
+        return this.positions;
     }
 
     /*
@@ -74,8 +75,9 @@
     @Path("/{aid}/pageMap/0/layers/0/strokes/{strokeNo}/position")
     @POST
     @Produces(MediaType.APPLICATION_JSON)
-    public void addPositions(@PathParam("aid") Integer aid, @FormParam("x") Integer x, @FormParam("y") Integer y) {
-        this.Position.putPosition(x, y);
+    public void addPositions(@PathParam("aid") Integer aid, @FormParam("x") Float x, @FormParam("y") Float y) {
+        this.Position.setXY(x, y);
+        this.positions.add(this.Position);
     }
 }