# Help with java library (AI for Games)
**URL:** https://discourse.processing.org/t/help-with-java-library-ai-for-games/18039
**Category:** Libraries
**Created:** [February 23, 2020, 7:16am UTC](https://discourse.processing.org/t/help-with-java-library-ai-for-games/18039 "2020-02-23T07:16:44Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@ctrembla](https://discourse.processing.org/u/ctrembla)
#### Post date: [February 23, 2020, 7:16am UTC](https://discourse.processing.org/t/help-with-java-library-ai-for-games/18039/1 "2020-02-23T07:16:44Z")
I found an ai library in java & thought should try it. I’m doing the tutorial, but get an error Idk how to fix.
this is in main
```auto
import game2dai.*;
import game2dai.entities.*;
import game2dai.entityshapes.*;
import game2dai.entityshapes.ps.*;
import game2dai.fsm.*;
import game2dai.graph.*;
import game2dai.maths.*;
import game2dai.steering.*;
import game2dai.utils.*;
World world;
StopWatch sw;
Vehicle tank;
Vector2D target = new Vector2D();
BitmapPic view;
public void setup() {
size(600, 320);
world = new World(width, height);
sw = new StopWatch();
// Create the mover
tank = new Vehicle(new Vector2D(width/2, height/2), // position
40, // collision radius
new Vector2D(0, 0), // velocity
40, // maximum speed
new Vector2D(1, 0), // heading
15, // mass
1.5f, // turning rate
1000 // max force
);
// What does this mover look like
//here where I get the error
view = new BitmapPic(this, "tanks.png", 8, 1, 0);
view.showHints(Hints.HINT_COLLISION | Hints.HINT_HEADING | Hints.HINT_VELOCITY);
tank.renderer(view);
// Finally we want to add this to our game domain
world.add(tank);
sw.reset();
}
public void draw() {
double elapsedTime = sw.getElapsedTime();
target.set(mouseX, mouseY);
tank.AP().arriveOn(target);
float speed = (float) tank.speed();
float maxSpeed = (float) tank.maxSpeed();
if (speed > 1) {
float newInterval = map(speed, 0, maxSpeed, 0.6, 0.04);
view.setAnimation(newInterval, 1);
}
else {
view.pauseAnimation();
}
world.update(elapsedTime);
background(218, 140, 54);
world.draw(elapsedTime);
}
```
the error is ps.BitmapPic steering test string int int int does not exist
---
### Author:  [@quark](https://discourse.processing.org/u/quark)
#### Post date: [February 24, 2020, 5:08pm UTC](https://discourse.processing.org/t/help-with-java-library-ai-for-games/18039/2 "2020-02-24T17:08:32Z")
> [@ctrembla](#):
>
> view = new BitmapPic(this, “tanks.png”, 8, 1, 0);
This is wrong the constructor is expecting just 2 numbers for the number of columns and rows of sprites are in the image. You have three values `8, 1, 0`
Here is the source code for the constructor
```auto
/**
* An animated image.
* The image frames are stored as tiles within a single image
*
* @param papp
* @param fname the name of the bitmap image file
* @param nCols number of tiles horizontally
* @param nRows number of rows vertically
*/
public BitmapPic(PApplet papp, String fname, int nCols, int nRows){
super(papp);
img = ImageBank.getImage(papp, fname, nCols, nRows);
}
```
---
### Author:  [@ctrembla](https://discourse.processing.org/u/ctrembla)
#### Post date: [February 25, 2020, 9:48pm UTC](https://discourse.processing.org/t/help-with-java-library-ai-for-games/18039/3 "2020-02-25T21:48:40Z")
ty, I copied the code straight from the tutorial. Can you tall me how to find the vechile’s current x and y?
---
### Author:  [@quark](https://discourse.processing.org/u/quark)
#### Post date: [February 26, 2020, 9:22am UTC](https://discourse.processing.org/t/help-with-java-library-ai-for-games/18039/4 "2020-02-26T09:22:38Z")
If the game object (e.g. vehicle) is called `go` then you can get the x and y with
```auto
float x = (float) go.pos().x;
float y = (float) go.pos().y;
```
> [@ctrembla](#):
>
> I copied the code straight from the tutorial.
There are loads of web pages dedicated to this library please provide a link to the one where you got the code. Thanks 😄