how to use the getWorld variable?
When I use it says (cannot find symbol - variable getWorld)
liverpoolfc wrote ...
2019/7/7
getWorld variable
It is not a variable, it is a method. You have to use getWorld(), for example:
getWorld().addObject(new Bullet(), getX(), getY()); //add an instance of class Bullet at the current location of the actor
public class dolphin extends Actor
{
private final int gravity = 1;
private int velocity;
public dolphin() {
velocity = 0;
}
public void act()
{
fall();
if(Greenfoot.isKeyDown("space") && getY() > getWorld.getHeight - 50)jump();
move();
}
public void fall() {
setLocation(getX(),getY() + velocity);
if (getY() > getWorld.getHeight - 50)velocity = 0;
else velocity += gravity;
}
public void jump()
{
velocity = -20;
}
public void move() {
int y= getY();
int x= getX();
if(Greenfoot.isKeyDown("left"))x--;
if(Greenfoot.isKeyDown("right"))x++;
setLocation(x,y);
}
}
It will say "cannot find variable getWorld", because you missed the ( and ).
and? what and?
For example instead of
you need to use
getWorld.getHeight
getWorld().getHeight()
it works. thanks a lot.
You need to login to post a reply.