Disposers Demo

package DisposersDemo;

/**
 * A Disposer does some kind of disposing.
 *
 */
public interface Disposer
{
    /**
     * Dispose of the given waste.
     * Implementers must dispose of the waste in the manner they choose.
     *
     * @param  waste the wasted to be disposed of.
     */
    void dispose(String waste);
}
package DisposersDemo;


/**
 * Chipper disposes thing by cutting them into chips.
 */
public class Chipper implements Disposer
{
    public void dispose(String waste)
    {
        System.out.println("Now chipping: " + waste);
    }
}
package DisposersDemo;
/**
 * Incinerator disposes thing by burning them.
 */
public class Incinerator implements Disposer
{
    public void dispose(String waste)
    {
        System.out.println("Now burning: " + waste);
    }
}
package DisposersDemo;
/**
 * Some Gardener will be modeled here.
 */
public class Gardener
{
    private Disposer disposer;
    /**
     * Constructor for objects of class Gardener
     */
    public Gardener(Disposer disposer)
    {
        this.disposer = disposer;
    }
    public void removeWeeds(String input)
    {
        for (int ltr = 0; ltr < input.length()-4; ltr+=4)
        {
            String slice = input.substring(ltr,ltr+2);
            disposer.dispose(slice);
        }
    }
}
package DisposersDemo;

import java.util.*;
public class AppMain
{
    public static void main(String[] args)
    {
        Disposer machine;
        if (args.length == 0)
        {
            machine = new Incinerator();
        }
        else
        {
            machine = new Chipper();
        }
        Scanner scan = new Scanner(System.in);
        String data = scan.nextLine();
        Gardener gardener = new Gardener(machine);
        gardener.removeWeeds(data);
    }
}