Interface method and subclass does not exist!

yuhi1920

I always got problems with interfaces and subclass. Show as below, which shows that "the subclass does not exist" or "the function does not exist". I have no idea why this happened.Hope someone can help me. Thank you guys so much!

Here is the main tab

Animal Cat,Dog;
void setup(){
size(1600,800);

Furry Dog= new Furry("dog", "dog.png",100,"Brown");
Wild Cat= new Wild("cat","cat1.png",100);


}

void draw(){
  Cat.display();
  Dog.display();

  Cat.jumpAt();
}       

Here is my classes

interface jumpable {
  void jumpAt();
}


class Animal {
  String name;
  int healthLevel;
  PImage anImal;
  int posX, posY;

  Animal(String NA, String Imagefile, int health) {
    NA= name;
    anImal= loadImage(Imagefile);

    posX=(int)random(200, 1400);
    posY=(int)random(600);
    health=healthLevel;
  }

  class Furry extends Animal {
    String fur_color;
    Furry (String NA, String Imagefile, int health, String fur) {
      super(NA, Imagefile, health);
      fur_color=fur;
    }
  }

  class Wild extends Animal implements jumpable {
    Wild (String NA, String Imagefile, int health ) {
      super(NA, Imagefile, 100);
    }
    public void jumpAt() {
      if ((keyPressed)&&(keyCode== UP )) {
        Cat.posX=Dog.posX;
        Cat.posY=Dog.posY;
      }
    }
  }
  void display() {
    imageMode(CENTER);
    image(anImal, posX, posY, 150, 150);
  }
}

koogs

Where does the animal class finish?

yuhi1920

It finished after the display(); method. Thanks.

yuhi1920

Thank you a lot for the help Koogs! I see! I fixed it. But the method jumpAt()still doesn't work.......... Could you please tell me where I got wrong now? Sorry, I am new to processing.

Main tab

Animal Cat,Dog;

void setup(){
size(1600,800);

Furry Dog= new Furry("dog", "dog.png",100,"Brown");
Wild Cat= new Wild("cat","cat1.png",100);


}

void draw(){
  Cat.display();
  Dog.display();

  Cat.jumpAt();
}

class tab

interface jumpable {
  void jumpAt();
}


class Animal {
  String name;
  int healthLevel;
  PImage anImal;
  int posX, posY;

  Animal(String NA, String Imagefile, int health) {
    NA= name;
    anImal= loadImage(Imagefile);

    posX=(int)random(200, 1400);
    posY=(int)random(600);
    health=healthLevel;
  }
   void display() {
    imageMode(CENTER);
    image(anImal, posX, posY, 150, 150);
  }
  }

  class Furry extends Animal {
    String fur_color;
    Furry (String NA, String Imagefile, int health, String fur) {
      super(NA, Imagefile, health);
      fur_color=fur;
    }
  }

  class Wild extends Animal implements jumpable {
    Wild (String NA, String Imagefile, int health ) {
      super(NA, Imagefile, 100);
    }
    public void jumpAt() {
      if ((keyPressed)&&(keyCode== UP )) {
        Cat.posX=Dog.posX;
        Cat.posY=Dog.posY;
      }
    }
  }

koogs

Actually you can have classes inside classes, but you need to use their full names, Animal.Furry, for instance. But that is usually not what you want.

Furry Dog= new Furry("dog", "dog.png",100,"Brown");
Wild Cat= new Wild("cat","cat1.png",100);

Variables usually start with a lower case letter, so these should be called dog and cat.

That jump code looks ok, but I haven't run it myself. Add a println for debugging purposes.

yuhi1920

I' try to use println for debugging, Thank you very much!!

koogs

Ok, I've seen it now... Line 1 defines dog and cat as Animal.

Lines 6 and 7 redefines them. That's wrong.

Define them outside setup, which makes them global variables. Instantiate them inside setup. (Just remove the first word from each of lines 6 and 7). You will have also have to be more specific on line 1, they can't be Animals now.

yuhi1920

You are so patient. Thank you very much. I can continue to finish my program now. Have a nice day!

yuhi1920

Here is my code which can successful loop through. For people who got the similar problem with me.

Main tab

Furry dog;
Wild cat;

void setup(){
size(1600,800);

 dog= new Furry("dog", "dog.png",100,"Brown");
 cat= new Wild("cat","cat1.png",100);


}

void draw(){
  background(255,255);
  cat.display();
  dog.display();

  cat.jumpAt();
}

The class

    interface jumpable {
      void jumpAt();
    }

    class Animal {
      String name;
      int healthLevel;
      PImage anImal;
      int posX, posY;

      Animal(String NA, String Imagefile, int health) {
        NA= name;
        anImal= loadImage(Imagefile);

        posX=(int)random(200, 1400);
        posY=(int)random(600);
        health=healthLevel;
      }
       void display() {
        imageMode(CENTER);
        image(anImal, posX, posY, 150, 150);
      }
      }

      class Furry extends Animal {
        String fur_color;
        Furry (String NA, String Imagefile, int health, String fur) {
          super(NA, Imagefile, health);
          fur_color=fur;
        }
      }

      class Wild extends Animal implements jumpable {
        Wild (String NA, String Imagefile, int health ) {
          super(NA, Imagefile, 100);
        }

        public void jumpAt() {
          if ((keyPressed)&&(keyCode== UP )) {
            cat.posX=dog.posX;
            cat.posY=dog.posY;

          }
        }
      }

koogs

Ctrl-t in the editor will indent your code nicely (currently it goes a bit wrong after line 22). This way you can see the classes and methods clearer.