Running a script until [quit]

[überfuzz]

I'm making a simple calculator. It does what it should do, but only one line. Now I'd like to expand it so it runs until the user writes quit, or similar.

I run the methods handling to calculator from a method called statment(). The brilliant method I scrabbled together starts an infinite loop...

//code opening input and 
      boolean   runStatus   = true;
    while(runStatus)
      {
          map.put("ans",expression());  //expression() calculates one statement given by user.
         System.out.println(st.toString());
         if(st.isEOL())
         {
            System.out.println("Ans: " + map.get("ans"));
         }
         else if(st.getWord().equals("quit"))
         {
            runStatus = false;
         }
         else
         {
            System.out.println("Syntaxerror! Expected EOL not: "+st.toString());
         }
      }

If anyone could give a hint on how to get the script to run one row at the time after each other.

[überfuzz]

Sorry folks! :o