ADD file via upload

src/CollisionUtils.java

@@ -0,0 +1,29 @@
+package com.snakegame;
+
+import java.awt.Point;
+
+public class CollisionUtils {
+    public static boolean checkWallCollision(Point head, GameConfig config) {
+        if (!config.isWallCollisionEnabled()) {
+            if (head.x < 0) {
+                head.x = config.getWidth() - 1;
+            }
+            if (head.x >= config.getWidth()) {
+                head.x = 0;
+            }
+            if (head.y < 0) {
+                head.y = config.getHeight() - 1;
+            }
+            if (head.y >= config.getHeight()) {
+                head.y = 0;
+            }
+            return false;
+        } else {
+            return head.x < 0 || head.x >= config.getWidth() || head.y < 0 || head.y >= config.getHeight();
+        }
+    }
+
+    public static boolean checkSelfCollision(Point head, java.util.LinkedList<Point> body) {
+        return body.subList(1, body.size()).contains(head);
+    }
+}