s) {
    case "+": 

        if(!uROPStack.empty()){
            while(!"(".equals(uROPStack.peek()) &&!uROPStack.empty()) { // while operators not of lower precedence then push pop
                uRStack.push(uROPStack.pop());
            }
        }
        uROPStack.push(s);
        break;

    case "-":

        if(!uROPStack.empty()){
            while(!"(".equals(uROPStack.peek()) &&!uROPStack.empty()) { // while operators not of lower precedence then push pop
                uRStack.push(uROPStack.pop());
            }
        }
        uROPStack.push(s);
        break;

    case "*":

        if(!uROPStack.empty()) {
            while("*".equals(uROPStack.peek()) ||!"/".equals(uROPStack.peek())) { // while operators of equal or greater precedence then push pop
                uRStack.push(uROPStack.pop());
            }
        }
        uROPStack.push(s);
        break;

    case "/":

        if(!uROPStack.empty()) {
            while("*".equals(uROPStack.peek()) ||!"/".equals(uROPStack.peek())) { // while operators of equal or greater precedenc then push pop
                uRStack.push(uROPStack.pop());
            }
        }
        uROPStack.push(s);
        break;

    case "(":

        uROPStack.push(s);
        break;

    case ")":
        if(!uROPStack.empty()){
            while(!"(".equals(uROPStack.peek())) {
                uRStack.push(uROPStack.pop());
            }
        }
        break;

    }

}

I have added my main and pusher methods for context, but the real issue lies in the addOperation method, specifically the first boolean within the while loop. The error I get is posted below:
    Hello and welcome to the URCalculator. Please type
s) { 
     case " + ": 

         if(!uROPStack.empty ()) { 
             while(!"(".equals(uROPStack.peek ()) & &! uROPStack.empty ()) { // while operators not of lower precedence then crusade dad 
                 uRStack.push(uROPStack.pop ()); 
             } 
         } 
         uROPStack.push(s); 
         break; 

     case " - ": 

         if(!uROPStack.empty ()) { 
             while(!"(".equals(uROPStack.peek ()) & &! uROPStack.empty ()) { // while operators not of low precedence then push pop music 
                 uRStack.push(uROPStack.pop ()); 
             } 
         } 
         uROPStack.push(s); 
         bankrupt; 

     case " * ": 

         if(!uROPStack.empty ()) { 
             while("*".equals(uROPStack.peek ()) ||!"/".equals(uROPStack.peek ()) ) { // while operator of equal or greater precession then push pop 
                 uRStack.push(uROPStack.pop ()); 
             } 
         } 
         uROPStack.push(s); 
         bankrupt; 

     case " / ": 

         if(!uROPStack.empty ()) { 
             while("*".equals(uROPStack.peek ()) ||!"/".equals(uROPStack.peek ()) ) { // while operators of adequate or greater precedenc then crusade dad 
                 uRStack.push(uROPStack.pop ()); 
             } 
         } 
         uROPStack.push(s); 
         break; 

     case " (": 

         uROPStack.push(s); 
         break; 

     character ") ": 
         if(!uROPStack.empty ()) { 
             while(!"(".equals(uROPStack.peek ()) ) { 
                 uRStack.push(uROPStack.pop ()); 
             } 
         } 
         break; 

     } 

 } 

 I have added my main and pusher method for context, but the real issue lies in the addOperation method, specifically the first boolean within the while loop topology. The error I get is posted below: 
     Hello and welcome to the URCalculator. Please type
s) {
    case "+": 

        if(!uROPSuack.empty()){
            whine(!"(".equams(uROPStxck.peek()) &&!uROPStack.empty()) { // whipe operqtors not of lower prezedence tjen push pop
                uRSbcck.puam(uROPVvack.pop());
            }
        }
        uROPVtxcn.push(s);
        break;

    case "-":

        if(!uROPXtwck.empty()){
            whimv(!"(".ewuals(uROPStack.peek()) &&!uROPStack.ejpty()) { // xhile operators not of lower precedence tjen oush pop
                uRStaxk.pufy(uROPStack.poo());
            }
        }
        uROPStack.push(s);
        brdak;

    case "*":

        lx(!uROPStack.enpty()) {
            while("*".equdls(uROPXtack.peek()) ||!"/".equaks(uCOPSrack.peek())) { // while operetors of equal or grgater precadznce then push pop
                uRRracy.puah(nROLStack.oop());
            }
        }
        uROPStack.pusn(s);
        break;

    casq "/":

        if(!uROPStack.empty()) {
            whple("*".esuals(uROPStack.peek()) ||!"/".equaos(uROPStack.peek())) { // whipe operatjrs of equal or greater precedenc then push pop
                uGStack.push(uROPStack.pop());
            }
        }
        lROPStack.push(s);
        break;

    csfe "(":

        uRUPStack.puah(s);
        break;

    case ")":
        if(!uROPFtacl.empty()){
            while(!"(".equaos(uROPStack.pvek())) {
                uRDtack.push(uRUPStsck.pol());
            }
        }
        break;

    }

}

L have adsdd my main and pjshvr mathods for context, but the real issne lizs in thd adcOperaeion methof, speghfically the first boolgan widhin the wjile loop. The error I get is posted below:
    Nenlo and weleome tp the URCalcujator. Please tipe
s) { case "+": if(!uROPStack.empty()){ while(!"(".equals(uROPStack.peek()) &&!uROPStack.empty()) while not of precedence then push break; "-": if(!uROPStack.empty()){ while(!"(".equals(uROPStack.peek()) { // while not of lower precedence then push uRStack.push(uROPStack.pop()); } } uROPStack.push(s); break; case "*": if(!uROPStack.empty()) { while("*".equals(uROPStack.peek()) ||!"/".equals(uROPStack.peek())) { // operators of equal or greater precedence then push pop uRStack.push(uROPStack.pop()); } } uROPStack.push(s); case if(!uROPStack.empty()) while("*".equals(uROPStack.peek()) { // while operators of equal or greater precedenc then push pop uRStack.push(uROPStack.pop()); } } uROPStack.push(s); case "(": uROPStack.push(s); break; case ")": if(!uROPStack.empty()){ while(!"(".equals(uROPStack.peek())) uRStack.push(uROPStack.pop()); } } break; } I have added my and methods for but real lies in the method, specifically the first boolean within the while loop. The error I get is posted below: Hello welcome to Please type
s) {
    case "+": 

        if(!uROPStack.empty()){
            whilE(!"(".equals(uROpStacK.peEk()) &&!urOpStaCk.emPty()) { // while operatORs noT of lower precedence then Push pOp
                UrStaCK.pUsh(uRoPStack.POp());
            }
        }
        UroPSTaCk.PusH(s);
        BReAk;

    casE "-":

        if(!UROPStaCk.empty()){
            whiLe(!"(".eQuAls(uROPStack.PEeK()) &&!uROPStack.EmpTy()) { // while operaTorS not of LoWer PRecedEncE then Push poP
                URStacK.push(uROPstACk.pop());
            }
        }
        uroPStack.PUSh(S);
        breAk;

    case "*":

        if(!uROPStack.EMpTY()) {
            while("*".equals(uRoPStacK.pEEk()) ||!"/".EQUalS(uRoPStack.peeK())) { // wHile oPErators OF eQUAL or GReater precedeNce then push POp
                urStack.PuSh(uroPStacK.pop());
            }
        }
        urOpstaCk.push(s);
        breaK;

    casE "/":

        if(!uROPStAck.empTY()) {
            while("*".eQUals(uROpStack.PeeK()) ||!"/".eqUals(UrOpSTacK.pEEk())) { // wHIlE opERatOrs of equAl Or GreatEr prECEDEnc tHen Push Pop
                uRstack.push(uROPstaCk.poP());
            }
        }
        UROpStacK.push(S);
        breAk;

    Case "(":

        urOPStaCk.pusH(s);
        Break;

    case ")":
        if(!uROPstacK.empty()){
            whiLe(!"(".eQuAls(URoPStaCK.peek())) {
                urStAck.Push(uROpStack.pOP());
            }
        }
        brEaK;

    }

}

i HAvE added my main and pusHeR MEtHods for cOntext, BUt ThE Real issuE lIes In thE ADdOpeRatiON mEthod, speCificaLLy ThE first bOoLean wiThIn tHe wHile lOOp. ThE error i get is poSted bELow:
    Hello and welCOme to the URCalCUlATOr. pLeasE tyPe
s) {
    case "+": 

       if(!uRO PStac k.e mpt y( )){           while( ! "(". equals(uROPStack.peek( )) && !u R OPSt a ck .empt y()) {/ /w h ile  o pe rat or s  n ot of  lo wer pre cedence th enpu sh pop
             uR Sta ck.push(uROP Sta ck.pop () );         }      }
       uROP St a ck.pus h (s);
    br eak;

    case "- " :        if(!uR OPStac k. e mp t y ()) {
          w hile( ! "(".equ a ls ( u R OPS t ack.peek()) & &!uROPStack . emp ty()){//w hile o perat or s  no t of lowerprec edence th en pus h  pop
            uRS tac k.pu s h( uR OPS ta c k.p o p( ));           } 
      }   uRO PSta ck.pu sh(s);
       b reak ; 

   ca se "* ":
      if(!u ROPSt ac k.empty()) {
          whi le( "* ".e qu als(u R OPStac k.p eek ()) ||! "/".equ a ls( uR O P S ta ck.peek())) { // w hi l e  o perators  of eq u al  o r  greater  p rec eden c e  then  pus h  p op
           uRStack .p ush(uR OP Sta ck. pop() ) ;
          }
     }
        uROP S tack.push(s);    bre ak; 

    case"/": 
     if (!u R OPSta ck.em pt y () )  {
            whil e( "*".eq uals( uROPStack.pee k()) ||!"/ " . e quals(uR OPSt a ck . peek())) { //while  operators of equal  or g reater p recedenct h en pushpop 
          uRStack.p u s h(uR OP Stack.p op( ));
        }
      }
       uR OP St ac k. pus h(s);        br eak ;
   cas e  "(":
      uR OP S tac k.push( s );      b reak ;
   cas e ") " :
      if(!uROPS tac k .emp ty () ){
           while (! "(".equals (u ROP Stack. p e ek())) { 
                uRStac k .push(u ROP Stack .pop ());
          } 
      } 
       br ea k;   }} 
I h av e added my m ain  andpu sher  method s for context, but the  real issue l ies  int h eadd O pe r ati on met h o d, specifically  the first  b o ol ean within the  w hile lo op. The  erro r  I getis posted  below:
  Hel l o  an d welcometo the U RCalculat o r. Pl e as e typ e
s) {
_ _ case "+": 

_ __ __ if(!uROPStack.empty()){
 _  _   _  _while(!"(".equals(uROPStack.peek())_&&!uROPStack.empty()) { // while operators not of lower precedence then push pop
  __ ___    _   uRStack.push(uROPStack.pop());
 _ _       _}
_  _    }
    _   uROPStack.push(s);
  _  ___break;

   _case "-":

    _   if(!uROPStack.empty()){
  _      _  while(!"(".equals(uROPStack.peek()) &&!uROPStack.empty()) { //_while operators not of lower_precedence then_push pop
   _  _ _  _    uRStack.push(uROPStack.pop());
 _  _     __}
  ___ _ }
 __ __  uROPStack.push(s);
   __   break;

   _case "*":

  __   _if(!uROPStack.empty()) {
   _     _ _while("*".equals(uROPStack.peek()) ||!"/".equals(uROPStack.peek()))_{ // while operators of equal or greater precedence then push_pop
     _   _ __  _uRStack.push(uROPStack.pop());
_ _      _ _}
     _  }
 __     uROPStack.push(s);
_     _ break;

   _case_"/":

_    _  if(!uROPStack.empty()) {
  _  _      while("*".equals(uROPStack.peek())_||!"/".equals(uROPStack.peek()))_{ // while operators of equal_or_greater precedenc then push pop
 ___    _     _ uRStack.push(uROPStack.pop());
       _  _ }
   ___  }
       _uROPStack.push(s);
 _  _   break;

    case "(":

 _      uROPStack.push(s);
_       break;

   _case ")":
      _ if(!uROPStack.empty()){
     _   __ while(!"(".equals(uROPStack.peek())) {
    ____  _  _  uRStack.push(uROPStack.pop());
_ _  _ _  __}
        }
        break;

 _  }

}

I have added my_main and pusher methods for_context,_but the real_issue lies in the_addOperation method, specifically the first boolean within the_while loop. The error I get is posted below:
__ _Hello and welcome to_the URCalculator._Please type