refactoring:

src/main/java/PingPong/GamePanel.java

@@ -4,7 +4,6 @@ import javax.swing.*;
 import java.awt.*;
 import java.awt.event.KeyAdapter;
 import java.awt.event.KeyEvent;
-import java.util.Random;
 
 
 public class GamePanel extends JPanel implements Runnable {
@@ -27,7 +26,7 @@ public class GamePanel extends JPanel implements Runnable {
 
 
     public GamePanel() {
-        newPeddle();
+        newPaddle();
         newBall();
         score = new Score(FRAME_WIDTH, FRAME_HEIGHT);
         collisionChecker = new CollisionChecker();
@@ -76,7 +75,7 @@ public class GamePanel extends JPanel implements Runnable {
 
         ball = new Ball((FRAME_WIDTH/2)-(BALL_DIAMETER/2), ((FRAME_HEIGHT/2)-(BALL_DIAMETER/2)), BALL_DIAMETER, BALL_DIAMETER);
     }
-    public void newPeddle() {
+    public void newPaddle() {
         paddle_1 = new Paddle(0, (FRAME_HEIGHT/2)-(PADDLE_HEIGHT/2), PADDLE_WIDTH, PADDLE_HEIGHT, 1 );
         paddle_2 = new Paddle(FRAME_WIDTH-PADDLE_WIDTH, (FRAME_HEIGHT/2)-(PADDLE_HEIGHT/2), PADDLE_WIDTH, PADDLE_HEIGHT, 2 );
     }