Thread: Array and Menu

Hi i made a speed dial program
i made it so the user can input names using an array .. so it has an input from 0 -9
now i have two sections for the menu "input names" and "search names"
i can get the user to input names, but it wont .. link? with the second option on the menu so i cant show what the user chose as names from the first option
here is my code:

import java.awt.*;
import hsa.Console;
import java.io.*;
import java.text.*;
import java.util.Random;
public class speeddial
/*
 
*Module 12 Assignment
*July 20 2011
*Question Number 2
*/
{   
  static Console c = new Console ();
  public static void main (String[] args)
   {
        int choice;
        do
        {
            //MENU
            c.print("Main Menu");
            c.print("\n1. Enter Speed Dial Data");
            c.print("\n2. Speed Dial Search");
            c.print("\n3. Exit Program\n");
            c.print("Please enter a choice (1-3)\n");
            choice = c.readInt();
            if ((choice < 1) || (choice > 3))
            c.print ("\nPlease choose a number between 1-3 only");
            if (choice == 1) option1();
            if (choice == 2) option2();
            if (choice == 3) option3();
         }
         while (choice != 4);
 
   }
       //Option 1
       public static void option1()
{
       String name[] = new String [10];
        c.println("\nEnter Speed Dial Data\n");
        c.print("Enter names for speed dial in the order you would like them to be in (0-9)\n"); 
            for (int i = 0; i < 10 ; i++)
            { 
            name[i] = c.readLine();
            c.print("Please enter the next name");
            c.print("\n");
            }
            c.print("\n");
 } 
 
       //Option 2
       public static void option2()       
       {
       c.print("Search Speed Dial Names\n");
       c.print("The name you have selected for speed dial number 0 is " + name[0] + "\n");       
       }
 
       //Option 3
       public static void option3()
       {
       c.print("\nThank You for using Speed Dial.\n\n");
       }
 
}

some one pleaseeee help!

is it not possible to do it with an array?
cuz the whole point of the assignment is to use arrays ...

umm well it asks the user to enter 9 names cuz thats how many digits a phone has
and thats how many our teacher sed to put

but i was also wondering .. do u think its possible to make it so that right when the user enters all 9 names.. it takes them automatically to option 2?
is that possilble and do u think that will work?

yea i understand ....... im just completely stuck ... i dont think i should use the instance variable because the the instructions clearly state that i have to use an array variable ... so im just .. really confused and have no idea what i can do now!

The first thing I would do is declare your array globally since this is a small class. I wouldn't do this when you get into larger classes as it can get confusing if you have to many. Once you declare it globally and have populated the array all methods in the class will have access to it. In option2 you never ask the user to input a number to get the correct name that they want. Once you get what number they want you have to subtract it by one to get the proper index of the name. Indexes start at 0 not 1, so if the user enter 1 and you don't subtract 1 the second name in the array with be printed. In the c.print line you have names[0] this will always show the first name. You need to put in a the index that you want to print.

something like

c.print("Search Speed Dial Names\n");
int speedDialNum = c.readInt();
speedDialNum -= 1; //this will give you the proper index


then print names[speedDialNum]


two other things i noticed is that in you do while loop it continues until 4 is enter yet you tell the user to enter 3 to exit and you are actually setting the size of the array to 10 names not 9

Originally Posted by banny7

The first thing I would do is declare your array globally since this is a small class.

Java doesn't have global variables. I expect you mean declare it at class scope, i.e. as a class variable.

Yea i just always called them global because one of my teacher did and it just got stuck in my head