just a demo

slick2d_basicgame.java

import java.util.logging.Level;
import java.util.logging.Logger;

import org.newdawn.slick.AppGameContainer;
import org.newdawn.slick.BasicGame;
import org.newdawn.slick.GameContainer;
import org.newdawn.slick.Graphics;
import org.newdawn.slick.SlickException;

public class MyGame extends BasicGame
{
	public Opera(String title)
	{
		super(title);
	}
	
	public static void main(String[] args)
	{
		try
		{
			AppGameContainer game;
			game = new AppGameContainer(new MyGame("MyGame"));
			game.setTargetFrameRate(60);
			game.setVSync(true);
			game.setUpdateOnlyWhenVisible(true);
			game.setDisplayMode(800, 800, false);
			game.start();
		}
		catch (SlickException ex)
		{
			Logger.getLogger(MyGame.class.getName()).log(Level.SEVERE, null, ex);
		}
	}
	
	@Override
	public void init(GameContainer gc) throws SlickException
	{}
	
	@Override
	public void render(GameContainer gc, Graphics g) throws SlickException
	{}

	@Override
	public void update(GameContainer gc, int delta) throws SlickException
	{}
}