Update

src/main/java/PingPong/GamePanel.java

@@ -4,6 +4,7 @@ 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 {
@@ -14,7 +15,7 @@ public class GamePanel extends JPanel implements Runnable {
     static final int PADDLE_HEIGHT = 100;
     public static final Dimension SCREEN = new Dimension(FRAME_WIDTH, FRAME_HEIGHT);
 
-
+    Random random;
     Ball ball;
     Paddle paddle_1;
     Paddle paddle_2;
@@ -154,12 +155,12 @@ public class GamePanel extends JPanel implements Runnable {
             paddle_1.pressed(e);
             paddle_2.pressed(e);
         }
-    }
-    public void keyReleased(KeyEvent e) {
-        paddle_1.released(e);
-        paddle_2.released(e);
-    }
 
+        public void keyReleased(KeyEvent e) {
+            paddle_1.released(e);
+            paddle_2.released(e);
+        }
+    }