jsp - finding missing id's in java list -

jsp - finding missing id's in java list -

im trying create table shows wich id can pick object (employee) adding database. options lastly one+1 , of "free" id spots got free deleting object.

im trying create list of missing ids , dosent work me. made jsp , shows id's on way top id.

int lastid =tablelist.get(aadmin.getallemps().size()-1).getid(); list <integer> idlist=new arraylist<integer>(); int counter=0; itr= tablelist.iterator(); int i=0; while(itr.hasnext()){ employee tempemp=itr.next(); int id=tempemp.getid(); if(id!=i+counter){ for(int j=0 ; j<id-(i+counter); i++) idlist.add(i+counter+j); counter=counter+(id-(i+counter)); } i++;} iterator<integer> iditr=idlist.iterator(); while(iditr.hasnext()) { integer tempint= iditr.next(); %> <tr> <td> <%=tempint %><input type="radio" name="id" value="<%=tempint%>"> </td> </tr> <%}%> </table> <br>

any ideas ?

let's assume have list of integers (ids used) , expect have set<integer> ids free.

define max variable.

go through list of existing ids.

if current id list bigger max add together numbers between old max , new max , set max new value set. if it's smaller max remove set.

java jsp