About arrays

Im trying to add a new item in an existing list of menu. and the program will keep asking if you would like to add a new item in the menu. until i input a cue that it will stop asking.

ok so I try to do that. so I paste here my code..

if you input a "space" on the prompt "Enter your new menu" the loop will be terminated.

but i have a problem whenever i input an another menu
the arrays was just being updated and not adding a new menu..

for example I input a "bacon" and i put my desire prices on it.
however, if the program loops again and this time I input "Burger" and i put my desire prices on it.when the list is printed out again. the "bacon" was just being replaced by the "burger". how could I actually add a new item?

I Hope you get my problem fellas :D pls help mee



import java.io.*;
public class menu {


public static void main (String [] args)throws IOException{
BufferedReader read=new BufferedReader(new InputStreamReader(System.in));



String[] newMenu=new String[100];
String[] newHalf=new String[100];
String[] newWhole=new String[100];

for(int i=0;;i++){

System.out.println("Enter your new menu input<Space> if your done");
newMenu[i]=read.readLine();
if(newMenu[i].equals(" "))
{break;}
System.out.println("Enter its Half Order");
newHalf[i]=read.readLine();
System.out.println("Enter its Whole Order");
newWhole[i]=read.readLine();

System.out.println("==== Menu List ====\n");
System.out.println("Beef Broccoli");
System.out.println("Whole:210 Half:185");
System.out.println("Stir Fried Beef");
System.out.println("Whole:245 Half:195");
System.out.println("Beef Stew");
System.out.println("Whole:215 Half:145 ");
System.out.println("Sweet and Sour Pork");
System.out.println("Whole:266 Half:155 ");
System.out.println("Crispy Pata");
System.out.println(newMenu[i]);
System.out.println("Whole:"+newWhole[i]+"Half:"+newHalf[i]);


}
}
}

The problem is that you only ever print out one item from the array- the last value entered. You aren't replacing the old values, you simply aren't printing them out. To see what I mean, print out the value of i when you print out the menu.

Quote:

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Originally Posted by KevinWorkman

The problem is that you only ever print out one item from the array- the last value entered. You aren't replacing the old values, you simply aren't printing them out. To see what I mean, print out the value of i when you print out the menu.

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hmm sir what I am trying to do is to add items until the user is satisfied. but not exceeding 100 items.

is there any technique?

sorry Im a noob please bear with me.

sir just wondering if you could quote my codes and correct it ? will you? plss. :) hehe.

thanks you sir !!

Quote:

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Originally Posted by jezer08

hmm sir what I am trying to do is to add items until the user is satisfied. but not exceeding 100 items.

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Okay. Where is the code that makes sure the index does not exceed 100?

Quote:

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Originally Posted by jezer08

sir just wondering if you could quote my codes and correct it ? will you? plss. :) hehe.

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Absolutely not. That's not how this works. I told you the problem. If you ask for code again, I will not help you further.

Quote:

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Originally Posted by KevinWorkman

Okay. Where is the code that makes sure the index does not exceed 100?

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String[] newMenu=new String[100];
String[] newHalf=new String[100];
String[] newWhole=new String[100];

No. That creates arrays with 100 indexes. Where do you make sure your variable i does not exceed 100 (or 99)?

And that's not even your most basic problem. Like I said, you are only printing out the current value of i, not any of the previous values. So you're only printing the most recently added menu item.

Quote:

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Originally Posted by KevinWorkman

No. That creates arrays with 100 indexes. Where do you make sure your variable i does not exceed 100 (or 99)?
yeah i should have put it in for(int i=0;i<=100;i++).. my bad

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Quote:

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Originally Posted by KevinWorkman

And that's not even your most basic problem. Like I said, you are only printing out the current value of i, not any of the previous values. So you're only printing the most recently added menu item.

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yes that exactly my problem. i dont have any idea on how to preserve the latter added items T_T

The thing is, they ARE preserved. I don't think you're listening to me. You simply are not printing them out.

Quote:

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Originally Posted by jezer08

yes that exactly my problem. i dont have any idea on how to preserve the latter added items T_T

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You are preserving them. You are not printing them. This is what Kevin has told you twice. Did you try what he suggested and print out the value of i along with the menu item? That should help you understand what is going wrong.

Two suggestions that may help:

1) Make your arrays instance variables.

2) Put your menu printing code into a printMenu() method.

Also, when you post code on the forum, please use CODE tags.

-Gary-

I try to print them out...

System.out.println(newMenu[i]);
System.out.println("Whole:"+newWhole[i]+"Half:"+newHalf[i]);

if this is not what you are saying.. I guess i dont know how to do it right...if you could just teach me then. it will be awesome :)

We didn't miss those two lines. We saw them. They will print out one menu item -- the one with an index of i. You want to print out more than one -- you want to print out menu item 0, menu item 1, and all the others up to i. You are not doing that.

-Gary-

What is the value of i each time you print? I'm not sure what else I can say to make it more clear.

haha. i feel really st*pid god damm*t :)) I really dont know how to print them.. anyway just gonna sleep for now :D tnx for your time.. hopefully i could figure that out in my dreams :))

Hint: write a method that prints out the entire array. Call that method when you want to print it.