Java; anyone?

[Rick Sanchez]

Hi guys,

I've hit a brickwall and cannot work out my error, the error code is:

The type KeyControlledRobot is never used locally. KeyControlledRobot is in a external jar that has been linked.


I'm new to Java and your help is much appreciated.

Thank you

[Mobius]

Hi guys,

I've hit a brickwall and cannot work out my error, the error code is:

The type KeyControlledRobot is never used locally. KeyControlledRobot is in a external jar that has been linked.


I'm new to Java and your help is much appreciated.

Thank you

Can you give a bit more detail, maybe show the code?

Is this an error or a warning?

[ap0c]

Sounds like you need to look into java extends

take a look at this thread:

http://stackoverflow.com/questions/8...ther-java-file

[Rick Sanchez]

See attached. I've deleted the comments and the errors changed.

[Mobius]

See attached. I've deleted the comments and the errors changed.

Ok, What is it you're trying to do? You seem to have started out defining a Map class going by the .java filename, then tried to declare another public class inside its main method which isn't alowed. If you want to define KeyControlledRobot as a public class it needs to be in its own .java file.

[Rick Sanchez]

I am basically trying to create a "tank" that I can drive around with the up,down, left and right keys but can also get the tank to shoot using the space bar or similar keys.

I have the tank sprite ready but I am struggling with the rest lol.

[Mobius]

Without going into specific design details, you can define KeyControlledRobot as a seperate public class in a seperate KeyControlledRobot.java. Alternatively if you only want to use KeyControlledRobot inside the map class you can define it as a private class in Map.java. You would do the inside outside the Map class but not inside a method like you have now.

HTH

[Rick Sanchez]

Yay I got it working

Now I just need to make an automated version that can drive itself, detect walls (boolean) and automatically shoot at other tanks!

I know I need a while loop for this but is there anything else needed?

I'm re-writing this

public void keyPressed(KeyEvent e)
    {
        if (e.getKeyCode() == KeyEvent.VK_RIGHT)  
        {
            this.turnRight();
        }
        else if    (e.getKeyCode() == KeyEvent.VK_LEFT)
        {
            this.turnLeft();
        }
        else if (e.getKeyCode() == KeyEvent.VK_DOWN)
        {
            this.reverseGear();
            this.accelerate();
        }
        else if 
        (e.getKeyCode() == KeyEvent.VK_UP) 
        {
            this.forwardGear();
            this.accelerate();
        }
        
        if (e.getKeyCode() ==  KeyEvent.VK_ALT)
        {
            this.fire();
        }

Any advice would be appreciated

[blacksheep]

I've seen these sort of things before used in education/code competition type things (presuming this is a robot battle arena style idea where you get points for shooting the other robots) - do you have the api you're rewriting against to hand?

I'd separate the shoot/move out into two separate functions then in the main method you can just have a while loop that calls these and then maybe has a sleep in it. You can then refine the move/shoot as needed from random drive about to a grid search or if there is some kind of radar/detection of other objects etc.

[Rick Sanchez]

Exactly that. I am going to use a while loop to do this I think.

What I have so far and stuff commented out until I get the automation working properly.

[blacksheep]

If you're not going to use keys to control it you probably don't need the key listener interface nor register the object as a key listener.

You really don't want the while loop in the constructor - either have it in the main method or create another function like:

Private void run()
{
While(true)
{
Move();
Shoot();
}
}

Then in the main method you just have robbie.run().
Id
Also remove your URL from public posts

[blacksheep]

Sorry for the crappy formatting/capitalisation I'm typing this on a mobile device.

[Rick Sanchez]

Sorted