if statement - Check if 2 string are differents java -

i have problem if condition, have code :

if(!session.getattribute("login").equals(d3.getlogin_demandeur())){     //do }else{     //do else } 

so code if session.getattribute("login") equals d3.getlogin_demandeur() should go else statement, doesn't work, have printed out these 2 values , same , still go else statement, idea ?

edit :

here how print

system.out.println(session.getattribute("login")+"="+(d3.getlogin_demandeur())); 

and have :

smilleto=smilleto 

you can use trim() function remove unwanted spaces , use equalsignorecase() if don't have case sensitivity criteria.

string login = (string)session.getattribute("login").trim(); string logindemandeur = d3.getlogin_demandeur().trim(); // assuming getlogin_demandeur has return type string.  if(!login.equalsignorecase(logindemandeur)){   //do }else{   //do else }