//...
 private void demoInput() { 
  System.out.println("Insert some text: "); 
  try {
   userin = br.readLine(); 
  } catch (IOException e) { 
  System.out.println("Something went wrong!"); 
  return; 
 } 

 System.out.println("You said: " + userin); 
} while(!userin.equals("quit")); 
 }  
 //... 
}