Answers for "how to set selected value in select2 using jquery"

jquery select2 set value

<select id="lang" >
   <option value="1">php</option>
   <option value="2">asp</option>
   <option value="3">java</option>
</select>

<script>
	$("#lang").select2().select2('val','1');
</script>

jquery to set value in select2 dropdown button

$("#u20_cre").select2().val(["1","6"]).trigger("change");