Prompt Dropdown Transcript For Free

at some of the overloaded method signatures of J option pain so input dialog in a previous video we used a very simple signature where we can allow the user to enter free text the problem with free text is that we don't have a whole lot of control over what the user enters so here where we are we just have an open field the user can enter anything we're gonna parse that into a number if it's not really a number that the user enters it could crash our program so I could say enter gallons of gas 50 and what we'll see is a big ugly message that comes up that says number format exception so what we prefer to do is give the user a predefined list of value values this video is going to be a prerequisite to a the next video I'm going to do where we're going to simulate making a truck so that we can show the use of if tests so what I'm going to do is make a J option pane that allows us to choose regular cab super cab or super Krewe now I'm going to start by adding a new main class to our existing vehicles project I'll do this quickly because we've done it before we're going to call it create a truck and I'm going to choose finish and we'll simply give it a public static void main method P SVM and then tab and NetBeans will give us that public static void main and then I'm going to create a new method called prompt user okay because we know we don't like to keep the main method very heavy I'm going to right click and I'm going to use while I actually tell you what will click right here and I'm going to say create method prompt user and there we go okay remove this line and now what I'm going to do let me double click so we can see this in high definition now you might remember in a previous video we saw a string array that resulted when we parsed a file based on a delimiter the string array if you remember it will store multiple strings and it kind of stores them on different floors so floor number 0 1 2 3 4 5 if you wish we're going to do a similar thing here I'm going to say string and what are we going to call this we're going to call this cab so we're gonna say string cab equals new string now a couple things I need to do I need to use square brackets on the left side to indicate that this is going to be an array in other words a collection of multiple strings and then I need square brackets on the right side as well again to say it's going to be an array but the difference is I have to put a number on the right side to say how many strings I went to store into this array remember array can store multiple string variables or sorry multiple string values okay now that I've done that I can address each of these one by one and remember that we start counting with zero so I'll say cab zero equals and then what's our first option we have regular super cab and then super Krewe so we'll say first one is regular okay and then second one cab 0 sorry cab 1 remember we start counting with zero is super cab ok and terminate with the semicolon and then cab 2...