Using constants

src/main/java/se/urmo/my2dgame/entity/Entity.java

@@ -18,7 +18,6 @@ public abstract class Entity {
     public int spriteNum = 1;
 
     public Rectangle solidArea;
-    public boolean collisionOn = false;
 
     public abstract int boxLeft();
     public abstract int boxRight();
@@ -33,7 +32,7 @@ public abstract class Entity {
     protected final EnumSet<Direction> easts = EnumSet.of(Direction.E, Direction.NE, Direction.SE);
     protected final EnumSet<Direction> wests = EnumSet.of(Direction.W, Direction.NW, Direction.SW);
 
-    protected static final Map<Point, Direction> directionMap = Map.ofEntries(
+    protected static final Map<Point, Direction> DIRECTION_MAP = Map.ofEntries(
             Map.entry(new Point(0, -1), Direction.N),
             Map.entry(new Point(1, -1), Direction.NE),
             Map.entry(new Point(1, 0), Direction.E),

src/main/java/se/urmo/my2dgame/entity/Player.java

@@ -1,7 +1,7 @@
 package se.urmo.my2dgame.entity;
 
-import se.urmo.my2dgame.ImageUtil;
-import se.urmo.my2dgame.main.CollisionChecker;
+import se.urmo.my2dgame.util.ImageUtil;
+import se.urmo.my2dgame.util.CollisionChecker;
 import se.urmo.my2dgame.main.KeyHandler;
 import se.urmo.my2dgame.main.Screen;
 import se.urmo.my2dgame.main.UpdateListener;
@@ -68,7 +68,7 @@ public class Player extends Entity implements UpdateListener {
 
             // Lookup direction
             Point movement = new Point(dx, dy);
-            direction = directionMap.getOrDefault(movement, direction);
+            direction = DIRECTION_MAP.getOrDefault(movement, direction);
 
             if (direction != null && collisionChecker.checkTile(this)) {
                 if (norths.contains(direction)) {

src/main/java/se/urmo/my2dgame/main/AssetSetter.java

@@ -1,15 +0,0 @@
-package se.urmo.my2dgame.main;
-
-import se.urmo.my2dgame.object.Key;
-
-public class AssetSetter {
-    Screen screen;
-    public AssetSetter(Screen screen) {
-        this.screen = screen;
-    }
-
-    public void setObject() {
-        screen.obj[0] = new Key(23 * screen.TILE_SIZE, 7 * screen.TILE_SIZE);
-        screen.obj[1] = new Key(23 * screen.TILE_SIZE, 40 * screen.TILE_SIZE);
-    }
-}

src/main/java/se/urmo/my2dgame/main/Screen.java

@@ -1,8 +1,10 @@
 package se.urmo.my2dgame.main;
 
 import se.urmo.my2dgame.entity.Player;
+import se.urmo.my2dgame.object.AssetSetter;
 import se.urmo.my2dgame.object.SuperObject;
-import se.urmo.my2dgame.tile.TileManager;
+import se.urmo.my2dgame.tile.World;
+import se.urmo.my2dgame.util.CollisionChecker;
 
 import javax.swing.*;
 import java.awt.*;
@@ -19,14 +21,11 @@ public class Screen extends JPanel {
     public static final int SCREEN_WIDTH = MAX_SCREEN_COL * TILE_SIZE;
     public static final int SCREEN_HEIGHT = MAX_SCREEN_ROW * TILE_SIZE;
 
-    //WORLD
-    public final int WORLD_MAX_COL = 50;
-    public final int WORLD_MAX_ROW = 50;
 
-    TileManager tileManager = new TileManager(this);
+    World world = new World(this);
     KeyHandler keyHandler = new KeyHandler();
 
-    public CollisionChecker collisionChecker = new CollisionChecker(tileManager);
+    public CollisionChecker collisionChecker = new CollisionChecker(world);
     public AssetSetter assetSetter = new AssetSetter(this);
     public Player player = new Player(collisionChecker, keyHandler);
     public SuperObject[] obj = new SuperObject[10];
@@ -48,7 +47,7 @@ public class Screen extends JPanel {
         super.paintComponent(g);
         Graphics2D g2d = (Graphics2D) g;
 
-        tileManager.draw(g2d);
+        world.draw(g2d);
         Arrays.stream(obj)
                 .filter(Objects::nonNull)
                 .forEach(o -> o.draw(g2d, this));

src/main/java/se/urmo/my2dgame/object/AssetSetter.java

@@ -0,0 +1,15 @@
+package se.urmo.my2dgame.object;
+
+import se.urmo.my2dgame.main.Screen;
+
+public class AssetSetter {
+    Screen screen;
+    public AssetSetter(Screen screen) {
+        this.screen = screen;
+    }
+
+    public void setObject() {
+        screen.obj[0] = new Key(23 * Screen.TILE_SIZE, 7 * Screen.TILE_SIZE);
+        screen.obj[1] = new Key(23 * Screen.TILE_SIZE, 40 * Screen.TILE_SIZE);
+    }
+}

src/main/java/se/urmo/my2dgame/object/SuperObject.java

@@ -1,5 +1,6 @@
 package se.urmo.my2dgame.object;
 
+import se.urmo.my2dgame.entity.Player;
 import se.urmo.my2dgame.main.Screen;
 
 import java.awt.*;
@@ -8,19 +9,15 @@ import java.awt.image.BufferedImage;
 public class SuperObject {
     public String name;
     public BufferedImage image;
-    public boolean collision = false;
     public int worldX;
     public int worldY;
 
     public void draw(Graphics2D g2d, Screen screen) {
         // Only drawImage for tiles within camera
-        if (worldX + screen.TILE_SIZE > screen.player.worldX - screen.player.SCREEN_X &&
-                worldX - screen.TILE_SIZE < screen.player.worldX + screen.player.SCREEN_X &&
-                worldY + screen.TILE_SIZE > screen.player.worldY - screen.player.SCREEN_Y &&
-                worldY - screen.TILE_SIZE < screen.player.worldY + screen.player.SCREEN_Y) {
-            int screenX = worldX - screen.player.worldX + screen.player.SCREEN_X;
-            int screenY = worldY - screen.player.worldY + screen.player.SCREEN_Y;
-            g2d.drawImage(image, screenX, screenY, screen.TILE_SIZE, screen.TILE_SIZE, null);
+        if(screen.isWithinScreen(worldX, worldY)) {
+            int screenX = worldX - screen.player.worldX + Player.SCREEN_X;
+            int screenY = worldY - screen.player.worldY + Player.SCREEN_Y;
+            g2d.drawImage(image, screenX, screenY, Screen.TILE_SIZE, Screen.TILE_SIZE, null);
         }
     }
 }

src/main/java/se/urmo/my2dgame/tile/Tile.java

@@ -3,6 +3,21 @@ package se.urmo.my2dgame.tile;
 import java.awt.image.BufferedImage;
 
 public class Tile {
-    public BufferedImage image;
-    public boolean collission = false;
+    private BufferedImage image;
+    private boolean collission = false;
+
+    public Tile(BufferedImage image) {
+        this(image, false);
+    }
+    public Tile(BufferedImage image, boolean collission) {
+        this.image = image;
+        this.collission = collission;
+    }
+
+    public boolean isCollision() {
+        return collission;
+    }
+    public BufferedImage getImage(){
+        return image;
+    }
 }

src/main/java/se/urmo/my2dgame/tile/TileManager.java

@@ -1,98 +1,21 @@
 package se.urmo.my2dgame.tile;
 
-import se.urmo.my2dgame.main.Screen;
-
-import javax.imageio.ImageIO;
-import java.awt.*;
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.util.Arrays;
+import se.urmo.my2dgame.util.ImageUtil;
 
 public class TileManager {
-    Screen screen;
-    public  Tile[] tiles = new Tile[10];
-    public int[][] mapTileNum;
 
-    public TileManager(Screen screen) {
-        this.screen = screen;
-        getTileImage();
-        this.mapTileNum = loadMap("/maps/world01.txt");
+    private static final Tile[] tiles = new Tile[10];
+
+    static {
+        tiles[0] = new Tile(ImageUtil.loadImage("/tiles/grass.png"));
+        tiles[1] = new Tile(ImageUtil.loadImage("/tiles/wall.png"), true);
+        tiles[2] = new Tile(ImageUtil.loadImage("/tiles/water.png"), true);
+        tiles[3] = new Tile(ImageUtil.loadImage("/tiles/earth.png"), true);
+        tiles[4] = new Tile(ImageUtil.loadImage("/tiles/tree.png"), true);
+        tiles[5] = new Tile(ImageUtil.loadImage("/tiles/sand.png"));
     }
 
-    public int[][] loadMap(String path) {
-        int[][] map = new int[screen.WORLD_MAX_ROW][screen.WORLD_MAX_COL];
-        try {
-            InputStream stream = Screen.class.getResourceAsStream(path);
-            BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
-            int row = 0;
-            String line;
-            while ((line = reader.readLine()) != null && row < screen.WORLD_MAX_ROW) {
-                map[row++] = Arrays.stream(line.split(" "))
-                        .mapToInt(Integer::parseInt)
-                        .toArray();
-            }
-            reader.close();
-        } catch (Exception e) {
-            e.printStackTrace();
-        }
-        return map;
-    }
-
-    public void getTileImage() {
-        try {
-            tiles[0] = new Tile();
-            tiles[0].image = ImageIO.read(Screen.class.getResourceAsStream("/tiles/grass.png"));
-
-            tiles[1] = new Tile();
-            tiles[1].image = ImageIO.read(Screen.class.getResourceAsStream("/tiles/wall.png"));
-            tiles[1].collission = true;
-
-            tiles[2] = new Tile();
-            tiles[2].image = ImageIO.read(Screen.class.getResourceAsStream("/tiles/water.png"));
-            tiles[2].collission = true;
-
-            tiles[3] = new Tile();
-            tiles[3].image = ImageIO.read(Screen.class.getResourceAsStream("/tiles/earth.png"));
-
-            tiles[4] = new Tile();
-            tiles[4].image = ImageIO.read(Screen.class.getResourceAsStream("/tiles/tree.png"));
-            tiles[4].collission = true;
-
-            tiles[5] = new Tile();
-            tiles[5].image = ImageIO.read(Screen.class.getResourceAsStream("/tiles/sand.png"));
-
-        } catch (IOException e) {
-            e.printStackTrace();
+    public static Tile[] getTiles() {
+        return tiles;
     }
 }
-
-    public void draw(Graphics2D g2d) {
-        int worldCol = 0;
-        int worldRow = 0;
-
-        while (worldCol < screen.WORLD_MAX_COL && worldRow < screen.WORLD_MAX_ROW) {
-            int tileNum = mapTileNum[worldRow][worldCol];
-
-            int worldX = worldCol * screen.TILE_SIZE;
-            int worldY = worldRow * screen.TILE_SIZE;
-
-            // Only drawImage for tiles within camera
-            if (screen.isWithinScreen(worldX, worldY)) {
-                int screenX = worldX - screen.player.worldX + screen.player.SCREEN_X;
-                int screenY = worldY - screen.player.worldY + screen.player.SCREEN_Y;
-                g2d.drawImage(tiles[tileNum].image, screenX, screenY, screen.TILE_SIZE, screen.TILE_SIZE, null);
-            }
-
-            worldCol++;
-
-            if (worldCol == screen.WORLD_MAX_COL) {
-                worldCol = 0;
-                worldRow++;
-            }
-        }
-    }
-
-
-}

src/main/java/se/urmo/my2dgame/tile/World.java

@@ -0,0 +1,72 @@
+package se.urmo.my2dgame.tile;
+
+import se.urmo.my2dgame.entity.Player;
+import se.urmo.my2dgame.main.Screen;
+
+import java.awt.*;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+
+public class World {
+    public static final int WORLD_MAX_COL = 50;
+    public static final int WORLD_MAX_ROW = 50;
+    Screen screen;
+    public static Tile[] tiles = TileManager.getTiles();
+    public int[][] mapTileNum;
+
+
+    public World(Screen screen) {
+        this.screen = screen;
+        this.mapTileNum = loadMap("/maps/world01.txt");
+    }
+
+    private int[][] loadMap(String path) {
+        int[][] map = new int[WORLD_MAX_ROW][WORLD_MAX_COL];
+        try {
+            InputStream stream = Screen.class.getResourceAsStream(path);
+            BufferedReader reader = new BufferedReader(new InputStreamReader(stream));
+            int row = 0;
+            String line;
+            while ((line = reader.readLine()) != null && row < WORLD_MAX_ROW) {
+                map[row++] = Arrays.stream(line.split(" "))
+                        .mapToInt(Integer::parseInt)
+                        .toArray();
+            }
+            reader.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return map;
+    }
+
+    public void draw(Graphics2D g2d) {
+        int worldCol = 0;
+        int worldRow = 0;
+
+        while (worldCol < WORLD_MAX_COL && worldRow < WORLD_MAX_ROW) {
+            int tileNum = mapTileNum[worldRow][worldCol];
+
+            int worldX = worldCol * Screen.TILE_SIZE;
+            int worldY = worldRow * Screen.TILE_SIZE;
+
+            // Only drawImage for tiles within camera
+            if (screen.isWithinScreen(worldX, worldY)) {
+                int screenX = worldX - screen.player.worldX + Player.SCREEN_X;
+                int screenY = worldY - screen.player.worldY + Player.SCREEN_Y;
+                g2d.drawImage(tiles[tileNum].getImage(), screenX, screenY, Screen.TILE_SIZE, Screen.TILE_SIZE, null);
+            }
+
+            worldCol++;
+
+            if (worldCol == WORLD_MAX_COL) {
+                worldCol = 0;
+                worldRow++;
+            }
+        }
+    }
+
+
+}

src/main/java/se/urmo/my2dgame/util/CollisionChecker.java

@@ -1,14 +1,15 @@
-package se.urmo.my2dgame.main;
+package se.urmo.my2dgame.util;
 
 import se.urmo.my2dgame.entity.Entity;
-import se.urmo.my2dgame.tile.TileManager;
+import se.urmo.my2dgame.main.Screen;
+import se.urmo.my2dgame.tile.World;
 
 public class CollisionChecker {
 
-    private final TileManager tileManager;
+    private final World world;
 
-    public CollisionChecker(TileManager tileManager) {
-        this.tileManager = tileManager;
+    public CollisionChecker(World world) {
+        this.world = world;
     }
 
     public boolean checkTile(Entity entity) {
@@ -67,9 +68,9 @@ public class CollisionChecker {
     }
 
     private boolean isNonePassable(int row1, int col1, int row2, int col2) {
-        int tileNum2 = tileManager.mapTileNum[row1][col1];
-        int tileNum1 = tileManager.mapTileNum[row2][col2];
+        int tileNum2 = world.mapTileNum[row1][col1];
+        int tileNum1 = world.mapTileNum[row2][col2];
 
-        return tileManager.tiles[tileNum1].collission || tileManager.tiles[tileNum2].collission;
+        return world.tiles[tileNum1].isCollision() || world.tiles[tileNum2].isCollision();
     }
 }

src/main/java/se/urmo/my2dgame/util/ImageUtil.java

@@ -1,4 +1,4 @@
-package se.urmo.my2dgame;
+package se.urmo.my2dgame.util;
 
 import javax.imageio.ImageIO;
 import java.awt.image.BufferedImage;