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ravicus
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Posts: 464
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 Posted: Sun Mar 18, 2007 3:36 pm Post subject: [COMMENTS!]My first made from scratch Java program |
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Hey guys, I have had a Java book laying around for a while now, and Pillboi's thread got me thinking that I should start learning. So i read about 100 pages in it and built this program, please tell me what you think( I know its useless, but it encourages me) about the program. Thanks.
PS. This isn't an example in the book, I built it.
| Code: | import java.util.Scanner;
//imports a function that allows me to get input from the user.
public class BillCalculate {
//Marks the start of the class: BillCalculate
public static void main(String[] args) {
//Starts the main section of the program
Scanner reader = new Scanner(System.in);
//Declares a new scanner for grabbing bills
double electricity = 0;
//Water, Housepayment, Internetservice, and totalbill are all declarations.
double water = 0;
double housepayment = 0;
double internetservice = 0;
double totalbill = 0;
System.out.println ("This Program will calculate a few of your bills.");
//Shows the text "This Program will calculate a few of your bills."
System.out.print ("What is your electricity bill? ");
//Shows the text "What is your electricity bill? "
electricity = (reader.nextDouble());
//Changes electricity, a variable, to whatever the user inputs.(must be a number)
System.out.print ("What is your Water Bill? ");
//You should be able to tell what the rest of these do.
water = (reader.nextDouble());
System.out.print ("What is your House Payment? ");
housepayment = (reader.nextDouble());
System.out.print ("What is your Internet Service? ");
internetservice = (reader.nextDouble());
System.out.println ("Adding all bills...");
totalbill = electricity + water + housepayment + internetservice;
System.out.print ("Your Total Bill is $");
System.out.print (totalbill);
System.out.println (" Thanks for using my bill adder!");
}
}
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Ok, I just finished making my second program, this one is based a lot off of if then statements
| Code: | import java.util.Scanner;
public class ifthen {
public static void main(String[] args) {
//Declarations
Scanner reader = new Scanner(System.in);
double magic = 58;
double userinput = 0;
double score = 0;
//Begin Code
System.out.print ("Please enter a number: ");
userinput = (reader.nextDouble());
if ((userinput) > (magic)) {
System.out.println ("YOU ARE ALMIGHTY!");
score++;
}
else {
System.out.println ("YOU ARE DUMBISH!");
score--;
}
System.out.print ("The score is now ");
System.out.println (score);
System.out.println ("Please enter another number: ");
userinput = (reader.nextDouble());
magic = magic + 320492;
if ((userinput) < (magic)) {
System.out.println ("NICE, YOU SCORED!~~~");
score++;
} else {
System.out.println ("You missed!");
score --;
}
System.out.println ("Now lets see how you did!!!");
if (score == 0) {
System.out.println ("You scored 0, Nice Try!");
} else if (score > 0){
System.out.println ("You scored more than 0! Nice Job!");
} else if (score < 0) {
System.out.println ("You scored less than 0! You'll do better next time!");
}
System.out.println ("The final score was ");
System.out.print (score);
}
} |
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Last edited by ravicus on Sun Mar 18, 2007 8:36 pm; edited 1 time in total |
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--Pillboi--
Grandmaster Cheater Supreme
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Joined: 06 Mar 2007
Posts: 1383
Location: I don't understand the question. Is this a 1 to 10 thing?
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| Posted: Sun Mar 18, 2007 3:48 pm Post subject: Re: [COMMENTS!]My first made from scratch Java program |
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| ravicus wrote: | Hey guys, I have had a Java book laying around for a while now, and Pillboi's thread got me thinking that I should start learning. So i read about 100 pages in it and built this program, please tell me what you think( I know its useless, but it encourages me) about the program. Thanks.
|
Wow. I actually influenced someone. Anyway...
Even though I don't know any Java, as you can tell from my last thread, this looks quite "cool" even though it's practically useless. It's the programming that counts.
--Pillboi--
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Enter darkness, leave the light, Here be nightmare, here be fright...
Earth and Water, Fire and Air. Prepare to meet a creature rare.
Enter now if you dare, Enter now the dragon's lair. |
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ravicus
Master Cheater
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Joined: 16 Dec 2006
Posts: 464
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| Posted: Sun Mar 18, 2007 6:10 pm Post subject: |
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Thanks, I just got back from church, so I'll post my comments on your thread now.
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DeltaFlyer
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Joined: 22 Jul 2006
Posts: 666
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| Posted: Sun Mar 18, 2007 6:22 pm Post subject: |
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I wish I had the Scanner class when I started... I had to use this:
| Code: |
private static BufferedReader c = new BufferedReader (
new InputStreamReader (System.in));
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Anyways, your code looks kinda long... maybe it's because of all the commenting. Don't comment every obvious step that you do, only outline places where you would like to explain your logic. Also, you don't have to keep track of all the variables if you only want a total. One variable as a total would do fine. To make it more easily expandable, you could probably even put the questions into an array so that you could easily add new questions.
Something like this:
| Code: |
import java.util.Scanner;
public class BillCalculate
{
public static void main (String[] args)
{
Scanner in = new Scanner (System.in);
String[] strs = {"Water Bill",
"House Payment",
"Internet Service"
};
double t = 0;
for (int i = 0 ; i < strs.length ; i++)
{
System.out.println ("What is your " + strs [i] + "?");
t += read.nextDouble ();
}
System.out.println ("Your Total Bill is $" + t);
}
}
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Wow.... still working at 827... what's INCA thinking?
zomg l33t hax at this place (IE only). Over 150 people have used it, what are YOU waiting for? |
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ravicus
Master Cheater
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Joined: 16 Dec 2006
Posts: 464
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| Posted: Sun Mar 18, 2007 6:25 pm Post subject: |
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Hmm, Thanks for the suggestion, except i havn't learned about strings yet, so i dont want to write code i don't understand.
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hallowicked
Master Cheater
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Posts: 312
Location: Kansas City
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| Posted: Tue Mar 27, 2007 8:28 am Post subject: |
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I haven't learned anything yet  YAY. I'm staring up on C++ Right now. Just got my clienty thingy for it and when I get home today I'm probly going to start working on SOMETHING... I have no idea what I'm going to make but y'know.
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ravicus
Master Cheater
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Joined: 16 Dec 2006
Posts: 464
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| Posted: Tue Mar 27, 2007 7:18 pm Post subject: |
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hmmm Well, I am a lot more advanced than this code now.
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