ADF 11G : How to set the first value for LOV default?

ADF 11G : How to set the first value for LOV default?

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public Number defaultDepartmentId(){

        Number deptId = (Number)getAttributeInternal(DEPARTMENTID);

        if (deptId == null) {

                 DepartmentsViewRowImpl deptRow = (DepartmentsViewRowImpl)getDepartmentsView1().first();

                 if (deptRow != null) {

                    deptId = deptRow.getDepartmentId();

                 }

              }

              return deptId;

    }