Exception in Application start methodの解決方法

前提

javafxでテトリスチックなものを作成しているのですが、昨日まで普通に動いていたのに本日実行しようとしたらエラーが出てしまいました。

発生している問題・エラーメッセージ

Exception in Application start method
Exception in thread "main" java.lang.IllegalArgumentException: 0 > -4
        at java.base/java.util.Arrays.copyOfRange(Arrays.java:3781)
        at java.base/java.util.Arrays.copyOfRange(Arrays.java:3741)
        at jdk.compiler/com.sun.tools.javac.launcher.Main.execute(Main.java:427)
        at jdk.compiler/com.sun.tools.javac.launcher.Main.run(Main.java:192)
        at jdk.compiler/com.sun.tools.javac.launcher.Main.main(Main.java:132)

該当のソースコード

import java.io.File;

import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.input.KeyEvent;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import javafx.util.Duration;
import javafx.event.EventHandler;
import javafx.event.ActionEvent;

public class Main extends Application{

   //x=0~11,y=0~14
   int[][] map = {
                  {1,0,0,0,0,0,0,2,0,0,0,1},
                  {1,0,0,0,0,0,0,0,0,0,0,1},
                  {1,0,0,0,0,0,0,0,0,0,0,1},
                  {1,0,0,0,0,0,0,0,0,0,0,1},
                  {1,0,0,0,0,0,0,0,0,0,0,1},
                  {1,0,0,0,0,0,0,0,0,0,0,1},
                  {1,0,0,0,0,0,0,0,0,0,0,1},
                  {1,0,0,0,0,0,0,0,0,0,0,1},
                  {1,0,0,0,0,0,0,0,0,0,0,1},
                  {1,0,0,0,0,0,0,0,0,0,0,1},
                  {1,0,0,0,0,0,0,0,0,0,0,1},
                  {1,0,0,0,0,0,0,0,0,0,0,1},
                  {1,0,0,0,0,0,0,0,0,0,0,1},
                  {1,0,0,0,0,0,0,0,0,0,0,1},
                  {1,1,1,1,1,1,1,1,1,1,1,1},
   };

   int HeroX = 5;
   int HeroY = 0;
   int x = 1000;

   Group root = new Group();

   Image wall = new Image(new File(".\\wall.jpg").toURI().toString());

   Image floor = new Image(new File(".\\floor.jpg").toURI().toString());

   Image Hero = new Image(new File(".\\Hero.jpg").toURI().toString());

   Scene scene = new Scene(root,300,300);

   @Override
   public void start (Stage s) throws Exception{
      s.setTitle("プロトタイプ");

      scene.setFill(Color.GRAY);
      
      s.setScene(scene);

      printMap();

      Timeline timer = new Timeline(new KeyFrame(Duration.millis(x),new EventHandler<ActionEvent>(){
         @Override
         public void handle(ActionEvent event){
            if(HeroY == 13 || map[HeroY+1][HeroX] == 2){
               map[HeroY][HeroX] = 2;
               HeroY = 0;
               HeroX = 7;
               printMap();
            }
            HeroY = Math.min(13,HeroY+=1);
            map[HeroY][HeroX] = 2;
            map[HeroY-1][HeroX] = 0;
            printMap();
            scene.setOnKeyPressed(e -> press(e));
         }
      }));

      timer.setCycleCount(Timeline.INDEFINITE);

      timer.play();
      
   
      s.show();
   }

   
   void press(KeyEvent event){
      map[HeroY][HeroX] = 0;

      switch (event.getCode()){
      case DOWN:
               if(map[HeroY+1][HeroX] == 2) {
                  map[HeroY][HeroX] = 2;
                  break;
               }
               HeroY = Math.min(13,HeroY+=1);
               map[HeroY][HeroX] = 2;
               break;
      case LEFT:
               HeroX = Math.max(1,HeroX-=1);
               map[HeroY][HeroX] = 2;
               break;
      case RIGHT:
               HeroX = Math.min(10,HeroX+=1);
               map[HeroY][HeroX] = 2;
               break;
      default: return;
      }

      
      printMap();
               
   }

   void printMap(){
      root.getChildren().clear();
      for(int i=0; i<12; i++){
         for(int j=0; j<15; j++){
            ImageView imv = new ImageView();
            if (map[i][j] == 1) imv = new ImageView(wall);
            else if(map[i][j] == 0) imv = new ImageView(floor);
            else if(map[i][j] == 2) imv = new ImageView(Hero);

            
            imv.setX(1+j*16);
            imv.setY(1+i*16);
            root.getChildren().add(imv);
         }
      }
  }

   

   public static void main(String[] args){
      launch(Main.class);
   }
}