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#19175 - 09/22/04 08:39 AM Second Java Program (what u think ?)  
Joined: Nov 2002
Posts: 1,146
Ice Offline
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Ice  Offline
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Canada
Well, I just started learing Java couple days ago, this is the second program i made.. the first one is really crapy, just fooling around with some basic stuff.

So i decided to use a IDE and started making this program. Its for school and it you made it in the "Consol" but i started fooling around with it and made it a little better. If ur wondering why the seond program goes to the console, gets the Grade, then goes back to Messages, its because Java cant use the variable String in switch statements, and i read some tutorials on connverting the string to a hash (Just got confused). So i just used this way lol. If the Comments dont seem correct, dont Flame i am new to this language. Heres my Code:

Code:
import javax.swing.JOptionPane; // Import the Class for the JOptionPane
import java.lang.String; // Import the Class for the String variable

/*
Name: Ice
Date: September 21, 2004
Exercise: Assignment #2
*/

public class SecondAssignment {
    public static void main(String[] Args) {

           int theChoice; // Declares all the Variables Needed
           int userAge;
           char theGrade;
		
		//Prompt the user to Pick the Assignment they wanna see and store it in userChoice

           String userChoice = JOptionPane.showInputDialog(null, "Assignment #2" + "\nPlease Pick the Assignment you would like to see: "
          + "\n(1) - The Age Program" + "\n(2) - The Switch Program", "Assigment #2", JOptionPane.INFORMATION_MESSAGE);

           	//Convert the String to a Integer and store it in theChoice so a Switch statment can be used
		
		theChoice = Integer.parseInt(userChoice);
           
		switch (theChoice) {
           case 1: // First Case

		//Asks the user How old they are and stores it in firstChoice

               String firstChoice = JOptionPane.showInputDialog(null, "Please Enter How Old you Are:", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
               userAge = Integer.parseInt(firstChoice);

			// IF/ELSEIF statment to check that message to print out to the user
               		
                        if (userAge <= 1)
			JOptionPane.showMessageDialog(null, "Infant", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
		else if (userAge == 2)
			JOptionPane.showMessageDialog(null, "Toddlert", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
		else if (userAge >= 3 && userAge <= 5)
			JOptionPane.showMessageDialog(null, "Preschool", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
		else if (userAge >= 6 && userAge <= 10)
			JOptionPane.showMessageDialog(null, "Child", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
		else if (userAge >= 11 && userAge <= 13)
			JOptionPane.showMessageDialog(null, "Preteen", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
		else if (userAge >= 14 && userAge <= 18)
			JOptionPane.showMessageDialog(null, "Teenager", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
		else if (userAge >= 19 && userAge <= 26)
			JOptionPane.showMessageDialog(null, "Young Adult", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
		else if (userAge >= 27 && userAge <= 45)
			JOptionPane.showMessageDialog(null, "Adult", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
		else if (userAge >= 40 && userAge <= 60)
			JOptionPane.showMessageDialog(null, "Older Adult", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
		else if (userAge >= 66 && userAge <= 100)
			JOptionPane.showMessageDialog(null, "Senior", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
		else
			JOptionPane.showMessageDialog(null, "Wise Old Sage", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
                System.exit(0);
		break;

            case 2: // Second Case

		// Ask the user for there Grade and store it inside theGrade char Variable

            System.out.print("Please Enter your Grade: ");
            theGrade = in.getChar();

		//Does the Switch Statement to see witch Message to print from the user		

            switch (theGrade) {
                case 'A': JOptionPane.showMessageDialog(null, "Excellent", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
                break;
                case 'B': JOptionPane.showMessageDialog(null, "Good", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
                break;
                case 'C': JOptionPane.showMessageDialog(null, "Average", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
                break;
                case 'D': JOptionPane.showMessageDialog(null, "Poor", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
                break;
                case 'F': JOptionPane.showMessageDialog(null, "Unsatifactory", "Assignment#2", JOptionPane.INFORMATION_MESSAGE);
                break;
                default:
                    JOptionPane.showMessageDialog(null, "Invalid Grade Assignment", "Assignment#2", JOptionPane.WARNING_MESSAGE);
                    break; }
                System.exit(0); // End the Program with nothing being stored into memory (Realese all Variables)
         }
     }
} 
Tell me what u guys think, and what i can do to improve :]


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steal.

-Picasso
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#19176 - 09/22/04 01:20 PM Re: Second Java Program (what u think ?)  
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You need pergesu... Looks good to me, but I know bare bones. I mean bare as they get bones

#19177 - 10/12/04 09:54 PM Re: Second Java Program (what u think ?)  
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Ice Offline
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i think Java is a weak Language thou
Its pretty sweet, but very weak at times.


Good artists copy, great artists
steal.

-Picasso
#19178 - 10/12/04 11:52 PM Re: Second Java Program (what u think ?)  
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However JSP pays big bucks. What I have found,

PHP - No major company wants to support it or never heard of it.

Perl - Never was intended to be a web language and it far to slow and complicated compared to what is out there.

ASP - slightly outdated

ASP.net - Jobs abound, get certed and SQL Certed and make some bank

JSP - Jobs abound, Get good with JDBC connections, dynamic content and make bank.

C# - See ASP.net

There are more but they fall under PHP's situation.

Python -
Delphi -
on and on and on

#19179 - 10/13/04 03:58 AM Re: Second Java Program (what u think ?)  
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Ice Offline
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Canada
I think C++ is pretty good. Some good jobs out there if your good with C++.


Good artists copy, great artists
steal.

-Picasso
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#19180 - 10/13/04 06:23 AM Re: Second Java Program (what u think ?)  
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'eh companies will learn of PHP; i'd definately learn it for now, it's a fuckin powerful and nice language


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#19181 - 10/13/04 10:48 AM Re: Second Java Program (what u think ?)  
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Ice Offline
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Agreed :] PHP is pretty sweet especially when combined with MySQL

Anyways, I've been working with Java, we learning Constructors and Objects :]

Heres a simple program if ur Intrested.

The Class:

Code:
class Circle {
    private double r;
 
    public Circle() {
        r = 1.0;
    }
    
    public Circle(double radius) {
        r = radius;
    }
    
    public double getr() {
        return r;
    }
    
    public void setr(double theNewRadius) {
        r = theNewRadius;
    }
   
    public double theArea() {
        return r *= 3.14;
    }
}
And the Program that uses the class:

Code:
public class theProgram {
    public static void main(String[] args) {
        
        // Using the Defualt Constructer
        Circle FirstCircle = new Circle();
        System.out.println("(1)The Radius is: " + FirstCircle.getr());
        System.out.println("(1)The Area is: " + FirstCircle.theArea());
        
        // Using the Second Constructor (Assignment)
        Circle SecondCircle = new Circle(4.1);
        System.out.println("(2)Radius is: " + SecondCircle.getr());
        System.out.println("(2)The Area is: " + SecondCircle.theArea());
        
        // Using the setr to assign the raduis to the circle
        Circle ThirdCircle = new Circle();
        ThirdCircle.setr(8.0);
        System.out.println("(3)Radius is: " + ThirdCircle.getr());
        System.out.println("(3)The Area is:" + ThirdCircle.theArea());
    }
}
Simple, but hey, its a learning process.


Good artists copy, great artists
steal.

-Picasso
#19182 - 10/14/04 09:01 AM Re: Second Java Program (what u think ?)  
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Agreed, PHP is a powerful, and awesome language. It's also pretty easy to learn.

#19183 - 10/24/04 02:53 AM Re: Second Java Program (what u think ?)  
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Ice Offline
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Ice  Offline
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Quote:
Agreed, PHP is a powerful, and awesome language. It's also pretty easy to learn.
Only problem is that only small and medium sized buisness use PHP/MySQL. The big enterprise buisness dont bother using PHP/MySQL :[


Good artists copy, great artists
steal.

-Picasso
#19184 - 02/23/05 12:02 PM Re: Second Java Program (what u think ?)  
Joined: Feb 2005
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SHiDi Offline
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Malaysia
I tried compiling the first java code u post. But some error came out. "cannot resolve symbol variable in".

I see that u used in.getChar() so I think u need to import java.io.*; and declared in as BufferedReader...

Btw despite what I'm suggesting here, does u program work?


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#19185 - 02/23/05 04:48 PM Re: Second Java Program (what u think ?)  
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Pimpin the Colorizzle
Change it to System.in.getChar()


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