Comparing null problem

[thirdy_veritech]

Hi, I have a problem with comparing Big Decimal with null

for (int x = 0; x < engagementList.size(); x++) {
					if(engagementList.get(x).getOverall_aef() != null)
						engagementList.remove(x);
				}

for(int a = 0; a < engagementList.size(); a++){
			log.info("engagementList.get(a).getOverall_aef()="+engagementList.get(a).getOverall_aef());	
		}

Output:

INFO  2008-02-04 17:39:06,828 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=null
INFO  2008-02-04 17:39:06,828 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=null
INFO  2008-02-04 17:39:06,828 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=null
INFO  2008-02-04 17:39:06,843 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=null
INFO  2008-02-04 17:39:06,843 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=null
INFO  2008-02-04 17:39:06,843 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=57.50
INFO  2008-02-04 17:39:06,843 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=null
INFO  2008-02-04 17:39:06,843 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=null
INFO  2008-02-04 17:39:06,843 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=null
INFO  2008-02-04 17:39:06,843 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=null
INFO  2008-02-04 17:39:06,843 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=null
INFO  2008-02-04 17:39:06,859 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=null
INFO  2008-02-04 17:39:06,859 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=null
INFO  2008-02-04 17:39:06,859 [EngagementAction.java:2989] engagementList.get(a).getOverall_aef()=null

an object with "Overall_aef" of 57.50 was not removed. Is it bad to compare with null? Is there any alternative?
Thanx!

[hardwired]

engagementList.get(x).getOverall_aef()
Does this method return a BigDecimal?
These work okay:

        BigDecimal one = BigDecimal.ONE;
        System.out.println("one = " + one);
        System.out.printf("one == null = %b%n",
                           one == null);
        System.out.printf("one.equals(null) = %b%n",
                           one.equals(null));

[thirdy_veritech]

engagementList.get(x).getOverall_aef()
Does this method return a BigDecimal?

Yes it returns a Big Decimal. How come my loop doesn't remove all Object(named Engagement) in my List(engagementList) with !null BigDecimal overall_aef?

I've already solve my problem by search the database rather than filtering the List but I'm still mystified why my loop didn't work well.