title: Sorting of Arraylist by date only sorts day and not month and year?
body: <p>I'm attempting to SORT an ArrayList by (Type Date) MyObject.getDate()</p>
  
  <p>My format is formatted by SimpleDateFormat by dd-mm-yyyy;
  I'm using a custom comparator to sort my list.
  I'm using Collections.sort(produuctList, new CustomComparator())</p>
  
  <p>Problem my sorted list is only by dd and not dd-mm-yyyy.</p>
  
  <p>Any ideas?</p>
  
  <pre><code>public class Product
  {
      private String productName; 
      private Date boughtOn;
      private Date useBy; 
      private double boughtAt; 
      private long quantity; 
      private static DateFormat dateFormat;
  
  
      public Date getUseBy()
      {
          return useBy;
      }
      public void setUseBy(Date useBy)
      {
          this.useBy = useBy;
      }
  }
  
  public static Date rtnDate(String dateStr, int currentLineCount)
      {
          SimpleDateFormat df = new SimpleDateFormat("dd-mm-yyyy");
          try
          {   
              Date date = df.parse(dateStr);
              return date;
          }
          catch (ParseException e)
          {
              productParsingErrorMessages.add("Date parse exception: " + e + "on line " + currentLineCount);
              return null;
          }
  
  //      DateFormat formatter = new SimpleDateFormat("dd-mm-yyyy");
  //      Date date2 = (Date)formatter.parse(dateStr);
      }
  </code></pre>
  
  <blockquote>
  <pre><code>System.out.println("Product list - BEFORE sorting by UseBy");
  printInventory(produuctList);
  
  Collections.sort(produuctList, new CustomComparator());
  
  System.out.println("Product list - AFTER sorting by UseBy");
  printInventory(produuctList);
  </code></pre>
  </blockquote>
  
  <pre><code>public class CustomComparator implements Comparator&lt;Product&gt;
  {
      @Override
      public int compare(Product o1, Product o2)
      {
          return o1.getUseBy().compareTo(o2.getUseBy());
      }
  }
  </code></pre>
  
  <p>Product list - BEFORE sorting by UseBy</p>
  
  <p>Product name: sugar  UseBy : 12-12-2012<br>
  Product name: sugar  UseBy : 01-10-2012<br>
  Product name: sugar  UseBy : 16-04-2012<br>
  Product name: sugar  UseBy : 30-01-2012<br>
  Product name: sugar  UseBy : 25-04-2012<br>
  Product name: sugar  UseBy : 03-04-2012<br>
  Product name: sugar  UseBy : 08-04-2012  </p>
  
  <p>Product list - AFTER sorting by UseBy</p>
  
  <p>Product name: sugar  UseBy : 01-10-2012<br>
  Product name: sugar  UseBy : 03-04-2012<br>
  Product name: sugar  UseBy : 08-04-2012<br>
  Product name: sugar  UseBy : 12-12-2012<br>
  Product name: sugar  UseBy : 16-04-2012<br>
  Product name: sugar  UseBy : 25-04-2012<br>
  Product name: sugar  UseBy : 30-01-2012</p>