Connect button from title screen to game.

package com.abc.ZeldaClone1;
 
import org.newdawn.slick.*;
import org.newdawn.slick.gui.*;
import org.newdawn.slick.geom.*;
import org.newdawn.slick.fills.*;
import mdes.slick.sui.*;
import mdes.slick.sui.event.ActionEvent;
import mdes.slick.sui.event.ActionListener;
import mdes.slick.sui.event.*;
import mdes.slick.sui.layout.*;
import mdes.slick.sui.event.MouseAdapter;
import mdes.slick.sui.event.MouseEvent;
 
 
public class TitleScreen extends BasicGame{
	Image backgroundImage = null;
	private Display display = null;
	private boolean displayPicture = true;
	
	public TitleScreen(){
		super("");
	}
	
	public void setImage(Image background){
		backgroundImage = background;
	}
	
	public Image getImage(){
		return null;
	}
 
	@Override
	public void init(final GameContainer container) throws SlickException {
		// TODO Auto-generated method stub
		//not implemented yet.. 
		backgroundImage = new Image("res/Title.jpg");
		
		container.getGraphics().drawImage(backgroundImage, 0, 0);
		display = new Display(container);
		
		Container contents = new Container();
		contents.setSize(300,150);
		contents.setLocation(250,375);
		contents.setOpaque(true);
		contents.setBackground(Color.black);
		
		RowLayout layout = new RowLayout(true,RowLayout.LEFT,RowLayout.CENTER);
		contents.setLayout(layout);
		
		
		Button btn = new Button("Press to Start Demo..");
		
		btn.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent event){
				display.removeAll();
			}
		});
		
		btn.pack();
		contents.add(btn);
		
		//add a label to the contents..
		Label label = new Label("Dungeon Crawler");
		label.setForeground(Color.white);
		label.pack(); //pack the label with current text
		label.setHeight(btn.getHeight());
		contents.add(label);
		
		display.add(contents);
		
		
	}
 
	@Override
	public void update(GameContainer container, int delta) throws SlickException {
		// TODO Auto-generated method stub
		display.update(container,delta);
        if (container.getInput().isKeyPressed(Input.KEY_ESCAPE))
            container.exit();
 
	}
 
	@Override
	public void render(GameContainer container, Graphics g) throws SlickException {
		// TODO Auto-generated method stub
		
		if(displayPicture == false){
		g.clear();
		}else{
			g.drawImage(backgroundImage, 0, 0);
		}
		display.render(container,g);
	}
}