refactoring:

src/main/java/PingPong/Score.java

@@ -18,7 +18,7 @@ public class Score extends Rectangle {
     public void draw(Graphics g) {
         ScoreColor(g);
         g.setFont(new Font("Consolas", Font.BOLD,50));
-            g.drawLine(FRAME_WIDTH/2, 0, FRAME_WIDTH/2, FRAME_HEIGHT);
+        drawScoreLine(g);
         g.drawOval((FRAME_WIDTH/2)-(COURT_CIRCLE/2), (FRAME_HEIGHT/2) - (COURT_CIRCLE/2), COURT_CIRCLE,COURT_CIRCLE);
             g.fillOval((FRAME_WIDTH/2)-(CENTER_DOT/2), (FRAME_HEIGHT/2) - (CENTER_DOT/2), CENTER_DOT,CENTER_DOT);
             g.drawString(String.valueOf(player_1/10) + String.valueOf(player_1%10), (FRAME_WIDTH/2)- 75, 50);
@@ -26,6 +26,10 @@ public class Score extends Rectangle {
 
     }
 
+    private static void drawScoreLine(Graphics g) {
+        g.drawLine(FRAME_WIDTH/2, 0, FRAME_WIDTH/2, FRAME_HEIGHT);
+    }
+
     private static void ScoreColor(Graphics g) {
         g.setColor(Color.white);
     }