title: Format Exception in input string (Java)
body: <p>I am writing an appointment program in Java and am coming across an error which is "Exception in thread "main" java.lang.NumberFormatException: For input string : "quit" " For the following lines :</p>
  
  <pre><code>Exception in thread "main" java.lang.NumberFormatException: For input string: "quit"
  at java.lang.NumberFormatException.forInputString(NumberFormatException.java:48)
  at java.lang.Integer.parseInt(Integer.java:449)
  at java.lang.Integer.parseInt(Integer.java:499)
  at AppointmentNew.main(AppointmentNew.java:24)
  </code></pre>
  
  <p>Also, when I make the selection in my code of printing a range of dates that the user inputs in the program it is printing out nothing, it is just going to the next line of "<strong>Make Choice ( 1: New, 2: Print Range, 3: Print All, quit):</strong>" It should print out the range of dates that the user inputs...</p>
  
  <p>Here is the code I have : </p>
  
  <pre><code>import java.util.*;
  import java.text.SimpleDateFormat;
  import java.util.Date;
  
  public class AppointmentNew 
  {
  public static void main (String[] args)
  {
    ArrayList&lt;String&gt; list = new ArrayList&lt;String&gt;();
    Scanner stdin = new Scanner(System.in);
    String choice = "";
    int choiceNum = 0;
    String date = "";
    String descrip = "";
    int type = 0;
    String typeChose = "";
  
    System.out.println("Welcome to Appointment App!\n");
    System.out.println("\t============================");
  
    do
    {
       System.out.print("\n\tMake Choice (1: New, 2: Print Range, 3: Print All, 4: Quit) ");
       choice = stdin.nextLine();
       choiceNum = Integer.parseInt(choice);
  
       if (choiceNum == 1)
       {
          System.out.print("\n\n\tEnter New Appointment Date in mm/dd/yyyy format: ");
          date = stdin.nextLine();
  
          System.out.print("\n\n\tEnter New Appointment Description: ");
          descrip = stdin.nextLine();
  
          System.out.print("\n\n\tEnter Type (1 = Once, 2 = Daily, 3 = Monthly): ");
          type = stdin.nextInt();
          stdin.nextLine();
  
          if (type == 1)
          {
             Once once = new Once(date, descrip);
             typeChose = "One-Time";
          }
          else if (type == 2)
          {
             Daily daily = new Daily(date, descrip);
             typeChose = "Daily";
          }
          else
          {
             Monthly monthly = new Monthly(date, descrip);
             typeChose = "Monthly";
          }
          String stringToAdd = "";
          stringToAdd = (date + " : \"" + descrip + "\", " + typeChose);
          list.add(stringToAdd);
  
          System.out.println("\n\n\tNew " + typeChose + " Appointment Added for " + date + "\n");
          System.out.println("\t============================\n");
  
  
       }
  
       if (choiceNum == 2)
       {
          System.out.print("\n\n\tEnter START Date in mm/dd/yyyy format: ");
          SimpleDateFormat sdf = new SimpleDateFormat("mm/dd/yyyy");
          Date lowDate = sdf.parse(stdin.nextLine());
          System.out.print("\n\n\tEnter END Date in mm/dd/yyyy format: ");
          Date highDate = sdf.parse(stdin.nextLine());  
  
          for(int i = 0; i &lt; list.size(); i++)
          {
             int dateSpot = list.get(i).indexOf(" ");
             String currentDate = list.get(i);
             currentDate.substring(0, dateSpot);  
  
             if (currentDate.compareTo(lowDate) &gt;= 0 &amp;&amp; currentDate.compareTo(highDate) &lt;= 0)
             {
                System.out.println("\n\t" + list.get(i));   
             }
          }
       }
  
       if (choiceNum == 3)
       {
          for(int i = 0; i &lt; list.size(); i++)
          {
             System.out.println("\n\t" + list.get(i));     
          }
       }
  
    }while (choiceNum != 4);      
   }
  }
  </code></pre>
  
  <p>Thank you in advance for any advice or help that is given!</p>