Throwntogether

import javafx.animation.AnimationTimer;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
import java.awt.Dimension;
import java.awt.Toolkit;


public class Constructor extends Application{

    Image player, shot;
    static Dimension screen = new Dimension(Toolkit.getDefaultToolkit().getScreenSize());
    static int wid = screen.width;
    static int hei = screen.height;
    static boolean up, down, left, right, rotleft , rotright;
    static double x = (wid/2)-109;
    static double y = (hei/1.5)-132;
    static double velx = 0, vely = 0, velx2 = 0, vely2 = 0;
    static double forspeed = 0, sidespeed = 0;
    static int rotat = 0;

    public void load(){
        player = new Image("res/sprite.png");
    }

    @Override
    public void start(final Stage frame) throws Exception{

        load();

        frame.setTitle("DEFAULT");
        frame.initStyle(StageStyle.UNDECORATED);

        Group root = new Group();
        final ImageView ship = new ImageView();
        ship.setImage(player);
        root.getChildren().add(ship);

        frame.setScene(new Scene(root,  wid,  hei, Color.BLACK));

        frame.addEventHandler(KeyEvent.KEY_PRESSED, new EventHandler<KeyEvent>(){
            public void handle(KeyEvent key) {
                  if(key.getCode()==KeyCode.W)
                       up = true;
                  if(key.getCode()==KeyCode.S)
                       down = true;
                  if(key.getCode()==KeyCode.Q)
                       left = true;
                  if(key.getCode()==KeyCode.E)
                       right = true;
                  if(key.getCode()==KeyCode.A)
                       rotleft = true;
                  if(key.getCode()==KeyCode.D)
                       rotright = true;

            }
        });
        frame.addEventHandler(KeyEvent.KEY_RELEASED, new EventHandler<KeyEvent>(){
            public void handle(KeyEvent key) {
                  if(key.getCode()==KeyCode.ESCAPE)
                  {
                      frame.close();
                      System.exit(0);
                  }
                  if(key.getCode()==KeyCode.W)
                       up = false;
                  if(key.getCode()==KeyCode.S)
                       down = false;
                  if(key.getCode()==KeyCode.Q)
                       left = false;
                  if(key.getCode()==KeyCode.E)
                       right = false;
                  if(key.getCode()==KeyCode.A)
                       rotleft = false;
                  if(key.getCode()==KeyCode.D)
                       rotright = false;

            }
        });
        frame.setAlwaysOnTop(true);
        frame.setHeight(hei);
        frame.setWidth(wid);
        frame.setResizable(false);
        frame.setFullScreen(true);
        frame.show();

         new AnimationTimer() {
                @Override
                public void handle(long now) {

                    gameloop();
                    ship.setTranslateX(x);
                    ship.setTranslateY(y);
                    ship.setRotate(rotat);
                }
            }.start();
    }

        public static void gameloop(){
        if(Shared.up)
            forspeed += 1;
        if(Shared.down)
            forspeed -= 1;
        if(Shared.right)
            sidespeed += 1;
        if(Shared.left)
            sidespeed -= 1;

        if(Shared.rotleft)
            rotat -=3;
        if(Shared.rotright)
            rotat +=3;

        velx = Math.cos(Math.toRadians(rotat-90))*forspeed + Math.cos(Math.toRadians(rotat))*sidespeed;
        vely = Math.sin(Math.toRadians(rotat-90))*forspeed + Math.sin(Math.toRadians(rotat))*sidespeed;

        if(!Shared.up && !Shared.down)
        {
            if(forspeed > 0)
                forspeed -= 0.2;
            else if (forspeed < 0)
                forspeed += 0.2;
        }
        if(!Shared.right && !Shared.left)
        {
            if(sidespeed > 0)
                sidespeed -= 0.2;
            else if (sidespeed < 0)
                sidespeed += 0.2;
        }

        x += velx;
        y += vely;

        screencolisions();
    }

    private static void screencolisions() {
        // LEFT RIGHT
        if(x < 0)
        {
            x = 0;
            sidespeed = 0;
        }
        else if (x+218 > Shared.wid)
        {
            x = Shared.wid-218;
            sidespeed = 0;
        }

        // UP DOWN
        if(y < 0)
        {
            y = 0;
            forspeed = 0;
        }
        else if (y+164 > Shared.hei)
        {
            y = Shared.hei-164;
            forspeed = 0;
        }

    }

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