refactoring:

src/main/java/PingPong/Paddle.java

@@ -56,7 +56,7 @@ public class Paddle  extends Rectangle {
 
     public void draw(Graphics g) {
         if (id == 1) {
-            g.setColor(Color.BLUE);
+            Paddle2(g);
             g.fillRect(x, y1, width, height);
         } else {
             Paddle1(g);
@@ -64,6 +64,10 @@ public class Paddle  extends Rectangle {
         }
     }
 
+    private static void Paddle2(Graphics g) {
+        g.setColor(Color.BLUE);
+    }
+
     private static void Paddle1(Graphics g) {
         g.setColor(Color.YELLOW);
     }