I'm trying to creat a map of custom tiles. The tile order is stored in a text file, and the tile images are jpg files in the data folder. If you need me to post those please just say so. I can't figure out how to display more than one kind of tile at a time, and I would appreciate any help.

color grassColor = color(0, 200, 0);
int tileSize = 20;
Tile grass = new Tile(tileSize, tileSize);
Map map2 = new Map(tileSize, tileSize, 10, 10, "map2");
PImage grassImage;
PImage rockImage;


void setup(){
size(800, 500);
grassImage = loadImage("grass.jpg");
rockImage = loadImage("rock.jpg");
map2.update();
}
void draw(){
 grass.create(0, 0);
 map2.create();
 //PFont fontA = loadFont("CourierNew36.vlw");
 //textFont(fontA, 36);
 //text(map1.returnMapTilesLength(), width/2, height/2);
 
}

class Tile{
String name;
float h;
float w;

 Tile(float dh, float dw){
   h = dh;
   w = dw;
 }
void create(float dx, float dy){
 if(name == "grass"){
 image(grassImage, dx, dy, w, h);
 }
 else if(name == "rock"){
 image(rockImage, dx, dy, w, h);
 }
 }
void identify(String dname){
 name = dname;
 }
void displayType(float dx, float dy){
 PFont fontA = loadFont("CourierNew36.vlw");
 textFont(fontA, 36);
 text(name, dx, dy);
}
}

class Map{
String name;
float tileW;
float tileH;
int mapW;
int mapH;
float w = tileW * mapW;
float h = tileH * mapH;
Tile[] MapTiles = new Tile[0];
String[] MapLoad;
String[] MapSave = new String[MapTiles.length];
   Map(float dtileW, float dtileH, int dmapW, int dmapH, String dname){
      tileW = dtileW;
      tileH = dtileH;
      mapH = dmapH;
      mapW = dmapW;
      name = dname;
   }
   
   void update(){
     MapTiles = (Tile[])expand(MapTiles, mapW * mapH);
     instantiate();
        MapLoad = loadStrings(name + ".txt");
      for(int i = 0; i < MapLoad.length; i++){
            if(MapLoad[i].equals("grass")){
              MapTiles[i].identify("grass");
             }
            else if(MapLoad[i].equals("rock")){
              MapTiles[i].identify("rock");
             }
       
      }
   }
       void create(){
      for(int i = 0; i < MapTiles.length; i++){
      for(int j = 0; j < mapW; j++){
      for(int k = 0; k < mapH; k++){
     
        MapTiles[i].create(j*tileSize, tileSize*k);
     }
   }  
 }
}
       void instantiate(){
         for(int i = 0; i < MapTiles.length; i++){
         MapTiles[i] = new Tile(tileSize, tileSize);
         }
   }
   int returnMapTilesLength(){
     return MapTiles.length;
   }
   int returnMapLoadLength(){
     return MapLoad.length;
   }
   int returnmapH(){
     return mapH;
   }    
   int returnmapW(){
     return mapW;
   }
}