Problems in using Value binding in JSF

Today we will see one of the major problem while using value binding in JSF and solution for it.Suppose if we have two fields subject1 and subject2 .In  focus lost of subject2 if we try to get value of subject1 using get method it will give you null value because values are not updated using valuebinding reason for this is while we use value biding  value will be updated in Update Model Value Phase  and value change listener is called  before Update Model Phase.

How to overcome this problem
        PhaseId phaseId = evt.getPhaseId();
        if (phaseId.equals(PhaseId.ANY_PHASE)) {
            evt.setPhaseId(PhaseId.UPDATE_MODEL_VALUES);
            evt.queue();
            return;
        }
Place the above code at the beginning of the method, So automatically updates all the values of the submitted form.