Beginning Java Program

[+witbyt Subscriber¹]

So this is a long shot but I've been part of neowin for a while and think you folks might be able to help me. I am in my first java program design class in college and need to a program that will

"Write a Java program that accepts numeric input from the user (integer value)

2. Print out the square and cube of the number entered.

3. Make sure that the number is > 0.

4. Repeat the above three times.

5. If the number entered is <= 0 then end the program, telling the user why.

Include appropriate prompts so that the user knows what to do."

I have no clue where to start, I have looked recently at other forums here and wow this is like spanish to me, maybe because I'm just starting, just looking for some help if anyone has any to offer.

Thank you!

[Andre S. Veteran]

Can you write and run any Java program at all? Do you have a development environment set up, such as Eclipse or Netbeans? Are you on Windows, Mac, Linux? Do you know how to print something to the console? Don't your class recommend a textbook or other resources? This sort of stuff is explained in detail in dozens of books and tutorials if you just take a look.

[kjordan2001]

1. Use scanner to read input: http://docs.oracle.c...il/Scanner.html The first example in that doc is what you'll need.

2. http://docs.oracle.c...dbolts/op1.html (multiplication operator) or for a more advanced case Math.pow (http://docs.oracle.com/javase/6/docs/api/java/lang/Math.html#pow(double, double))

3. http://docs.oracle.c...dbolts/op2.html

4. http://docs.oracle.c...olts/while.html or http://docs.oracle.c...dbolts/for.html

5. See 3 and 6 to learn how to do this.

6. Use Console (http://docs.oracle.c...io/Console.html) or System.out (http://docs.oracle.c...ang/System.html and http://docs.oracle.c...rintStream.html) to print prompts out to the user.

Hopefully that should give you some hints and good sources of documentation for you to learn about the Java language. I'll leave it to you to put the pieces together.

[tiagosilva29]

1. http://docs.oracle.com/javase/tutorial/essential/environment/cmdLineArgs.html
   

[TheDarkLord]

I think that you'll have to learn Java first. These tutorials might be able to help you in getting started with Java.

Try them and I am sure you'll be able to do whatever you want later in time.

Best of luck!

[Original Poster]

the program you are asking info on how to right is very simple ..

I will not give it to you but I shall, help you with one or two bits of code you need...

obviously you need a JDK to even get started... i recommend eclipse...

This will allow input from a command line nothing graphical.

Scanner action = new Scanner(System.in);
	   System.out.println("enter a number");
	   input = action.nextLine();
[/CODE]

in all honesty this is all im going to give you... everything else is very simple and if this is for your class then I am not helping you by giving you the answers :) im sure you know how to do IF else statements and for loops

[spacer]

I can't recommend Head First Java enough for beginners. I read the book a few weeks ago as a refresher since I hadn't done any Java programming since college. The book's cover makes it look stupid so I never thought twice about it. However, I just decided to go for it after reading some reviews, and it seriously was a fantastic read for people new to the language. I really recommend it.

I know it's not a direct answer to the OP's problem, but the book will really give you the tools to solve this problem as well as future ones.

http://www.amazon.com/Head-First-Java-Kathy-Sierra/dp/0596009208/ref=sr_1_1?ie=UTF8&qid=1328983484&sr=8-1

[Xilo]

Do your own homework.