Button.java

import greenfoot.*; // import every greefoot function, object and more

public class Button extends Actor
{
    private String action; // which action should this button has
    
    public Button(String _action)
    {
        this.action = _action;
        this.setImage(this.getButtonImage());
    }
    
    public void act()
    {
        this.executeButtonAction();
    }
    
    /**
     * Execute the action of the given button
     */
    private void executeButtonAction() {
        if (!Greenfoot.mouseClicked(this)) return;
        
        if (this.action == "start") {
            GameManager.start(); // start game
            return;
        }
    }
    
    /**
     * Set the image of the button based on the action
     */
    private GreenfootImage getButtonImage() {
        return new GreenfootImage("./images/" + this.action + "_button.png");
    }
}