Error should be raised immedietly

Question

Hi!!
I am using jdeveloper 11.1.1.5
I had a small use case in which i had dragged and dropped my EmpContDetVO as my af:table.
In which i have two fields such as startdate and enddate . If the user enters the enddate which is smaller than the startdate then the error occurs successfully when user tries to hit Save Button [Commit operation].
But i need to raise error immediatly when the user tries to navigate to other field.
Whether it is possible without using javascript. Could anyone can give me suggestion with appropriate documents

Answer 1

Thank you sameera!!
I had used this code in my AMImpl Method
   public void checkdate (){
        ViewObject vo = this.getPurAdminView1();
        Row vor = vo.getCurrentRow();
        Calendar cf = Calendar.getInstance();
        Calendar ce = Calendar.getInstance();
        java.util.Date startdate;
        java.util.Date enddate;
            startdate = convertDomainDateToUtilDate((Date)vor.getAttribute("PuraDateFrom")); //Returns the value
            enddate = convertDomainDateToUtilDate((Date)vor.getAttribute("PuraDateTo"));  //Returns the value
            cf.setTime(startdate);  
            ce.setTime(enddate);
            if (cf.after(ce)){
                throw new JboException ("Start date is greater than EndDate");
    }I had called this method using the validator
public void cil13_actionListner(FacesContext facesContext, UIComponent uIComponent,
                             Object object) {
            BindingContainer bindings = getBindings();
            OperationBinding operationBinding =
                bindings.getOperationBinding("checkdate");
            Object result = operationBinding.execute();
    }The null pointer Exception actually occurs in Calendar.java
    public final void setTime(Date date) {
        setTimeInMillis(date.getTime()); //Null Pointer Exception
    }Main Theme of my concept i need to check whether enddate is greater than startdate if not the error must be thrown immedieatly i.e., if user navigates to another field
@@Suresh--Thank you for your reply suresh But both of the startdate and enddate will be entered by the user.