title: Array index out of bounds exception 4
body: <p>I keep getting an error when trying to delete or display the users that I've created.  Pointing to the line of code where it actually does the deletion or displaying of a certain user.  I can't seem to figure out where the error is coming from.</p>
  
  <pre><code>import java.util.*;
  public class contactInfo {
      public static void main(String[] args) {
          String tracker[][] = {
                  {" ", " ", " ", " ",},
                  {" ", " ", " ", " ",},
                  {" ", " ", " ", " ",},
                  {" ", " ", " ", " ",},
                  {" ", " ", " ", " ",},
                  {" ", " ", " ", " ",},
                  {" ", " ", " ", " ",},
                  {" ", " ", " ", " ",},
                  {" ", " ", " ", " ",},
                  {" ", " ", " ", " ",}
          };
  
          Scanner input = new Scanner(System.in);
          int picker = 0;
  
          while (true) {
              System.out.print("Please choose an option: \n 1. Add a user  \n 2. Delete a user  \n 3. Display a user  \n 4. Quit ");
              picker = input.nextInt();
              if (picker == 1) {
                  addUser(tracker);
              } else if (picker == 2) {
                  deleteUser(tracker);
              } else if (picker == 3) {
                  displayUser(tracker);
              } else {
                  break;
              }
          }
      }
  
      public static String[][] addUser(String[][] add) {
          Scanner input = new Scanner(System.in);
  
          System.out.print("Which user is this information for (1 - 10): ");
          int user = input.nextInt();
          System.out.println(" ");
  
          System.out.print("Enter the users first name: ");
          add[user][0] = input.next();
          System.out.println(" ");
  
          System.out.print("Enter the users last name: ");
          add[user][1] = input.next();
          System.out.println(" ");
  
          System.out.print("Enter the users phone number (without dashes): ");
          add[user][2] = input.next();
          System.out.println(" ");
  
          System.out.print("Enter the users age: ");
          add[user][3] = input.next();
          System.out.println(" ");
  
          return add;
      }
  
      public static String[][] deleteUser(String[][] del) {
          Scanner input = new Scanner(System.in);
  
          System.out.print("Which user would you like to delete?: ");
          int user = input.nextInt();
  
          for (int i = 0; i &lt; del.length - 1; i++) {
              del[user][i] = " ";
          }
  
          return del;
      }
  
      public static String[][] displayUser(String[][] displ) {
          Scanner input = new Scanner(System.in);
  
          System.out.print("Which user would you like to display?: ");
          int user = input.nextInt();
  
          for (int i = 0; i &lt; displ.length; i++) {
              System.out.print(displ[user][i] + " ");
          }
  
          return displ;
      }
  }
  </code></pre>