View difference between Paste ID: ijzRGsYh and kWAEY3Aa

 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);
+            String weeds = input.substring(ltr,ltr+2);
-            disposer.dispose(slice);
+            disposer.dispose(weeds);
         }
     }
 }
 package DisposersDemo;
 
 import java.util.*;
 public class AppMain
 {
     public static void main(String[] args)
     {
         Disposer machine;
         // Decide which Disposer to use
         if (args.length == 0)
         {
             machine = new Incinerator();
         }
         else
         {
             machine = new Chipper();
         }
         // Read a line of input and give to Gardener
         Scanner scan = new Scanner(System.in);
         String data = scan.nextLine();
         // The gardener uses whatever disposer we created
         Gardener gardener = new Gardener(machine);
         gardener.removeWeeds(data);
     }
 }