java - System.out.println() and BufferedReader mixing up output in console -

i working on program, uses bufferedreader read input, , system.out.println() output.

here code:

public void choosemethod() throws ioexception{     int in = 0;     while(true){          system.out.println("what want do? (0 exit, 1 read bank         account, 2 write bank account, 3 read bill, 4 write bill): ");          in = integer.parseint(cin.readline());          if(in == 0){             break;         }else if((in < 0) || (in > 4)){             system.out.println("invalid choice.");         }else if(in == 1){             showbankaccount();         }else if(in == 2){             insertbankaccount();         }else if(in == 3){             showbill();         }else if(in == 4){             insertbill();         }      }      dbm.close();  }  public void insertbankaccount() throws ioexception{     int banknr = 0;     int sortcode = 0;     int accountnumber = 0;     int balance = 0;     int interest = 0;     string details;     string name;      while(true){         system.out.println("enter banknr (0 exit): ");         banknr = integer.parseint(cin.readline());          if(banknr == 0){             break;             }else if(banknr <= maxbanknr){             system.out.println("invalid number: taken");             break;         }          system.out.println("enter account name: ");         name = cin.readline();          system.out.println("enter sort code: ");         sortcode = integer.parseint(cin.readline());          system.out.println("enter account number: ");         accountnumber = integer.parseint(cin.readline());          system.out.println("enter balance: ");         balance = integer.parseint(cin.readline());          system.out.println("enter interest: ");         interest = integer.parseint(cin.readline());          system.out.println("enter details: ");         details = cin.readline();          bankaccountdao.insertbankaccount(banknr, sortcode, accountnumber, balance, interest, details, name);         this.maxbanknr = bankaccountdao.getmaxbanknr();       }   } 

now, enter "2" "write bank account," output follows:

run:

what want do? (0 exit, 1 read bank account, 2 write bank account, 3 read bill, 4 write bill):  enter banknr (0 exit):   2 

this "2" in output should before "enter banknr(0 exit):"

i have had problem several times, both scanner , bufferedreader, , have spent long time googling, can't seem find answers.

has else had problem? if so, how did manage fix it?

in insertbankaccount() method inside while loop change :

system.out.println("enter banknr (0 exit): "); banknr = integer.parseint(cin.readline()); 

to:

banknr = integer.parseint(cin.readline()); system.out.println("enter banknr (0 exit): ");