Please help with Java HomeWork

[Tomtstic]

I am having alot of problems with my java homework program and though maybe someone here might be able to help me out.

The assignment is:

CPS 121 – Program 5, Postage

20 points

Due: Monday, February 18

Task: Write a program that will calculate the length-plus-girth measurement that is used in post office regulations. Assume that a customer wants to mail several packages of the same size. Your program will verify that the packages qualify for first-class mail, and it will calculate the total postage due.

The length of a three-dimensional rectangular object is its longest dimension. The girth of the object is the distance around it, measured perpendicular to the length. In postal regulations, the length-plus-girth of a package cannot exceed 100 inches if the package is to be sent by first class mail.

Input: Using dialog boxes, input these items:

· 3 dimensions (in inches) of one package

· the weight (in ounces) of that package

· the number of that kind of package

Note: the user will provide 3 dimensions for the package, but you need to determine which of the three numbers is the longest. In other words, the user will give you 3 package measurements, but may enter them in any order.

Processing: If a package qualifies for first-class mail, assume that the postage due will be calculated as $0.42 per ounce. If a package does not qualify for first-class, it will be mailed by slower delivery bulk rate, which will be calculated as $0.23 per ounce.

Output: In one dialog box, display the length-plus-girth measurement of a package, the weight of the package, the number of packages, and the total postage due. Format money amounts neatly to 2 decimal places.

Here is my code:

//CPS 121, Assignment 5

//Postage Calculator

import javax.swing.JOptionPane;

public class PostageCalc

{

public static void main (String[] args)

{

final double firstclass, normal;

double dimension1, dimension2, dimension3, weight, //Input data

length, girth, size, postage;

String dimension1Str, dimension2Str, dimension3Str, weightStr;

firstclass = .42;

normal = .23;

dimension1Str = JOptionPane.showInputDialog("Enter the first dimension: " );

dimension1 = Integer.parseInt(dimension1Str);

dimension2Str = JOptionPane.showInputDialog("Enter the second dimension: " );

dimension2 = Integer.parseInt(dimension2Str);

dimension3Str = JOptionPane.showInputDialog("Enter the third dimension: " );

dimension3 = Integer.parseInt(dimension3Str);

weightStr = JOptionPane.showInputDialog("Enter the weight: ");

weight = Integer.parseInt(weightStr);

if ((dimension1 > dimension2) && (dimension1 > dimension3))

length = dimension1;

girth = (2 * dimension2) + (2 * dimension3);

if ((dimension2 > dimension1) && (dimension2 > dimension3))

length = dimension2;

girth = (2 * dimension1) + (2 * dimension3);

if ((dimension3 > dimension1) && (dimension3 > dimension2))

length = dimension3;

girth = (2 * dimension1) + (2 * dimension2);

size = length + girth;

if (size < 100 )

postage = size * firstclass;

JOptionPane.showMessageDialog(null, "Your package will be sent first class. ");

JOptionPane.showMessageDialog(null, "Your shipping cost is: " + postage);

if (size > 100)

postage = size * normal;

JOptionPane.showMessageDialog(null, "Your package will be sent through normal shipping." );

JOptionPane.showMessageDialog(null, "Your shipping cost is: " + postage);

System.exit(0);

}

}

[criso8]

In all honesty this isn't the greatest place to get help with this type of stuff but if your going to ask you should say what you may be wrong or what happens when you run it. Also formatting makes code a lot easier to read.

[VolkovBrad67]

Yea I think we're missing some brackets here, you can put your code in-between the CODE tags. Also you need to be more specific about what doesn't work, and what is your question.

But for starter, I can tell you a good way to find out the length would be to use arrays :

	int[ ] dimensions = { d1, d2, d3 } ;	Arrays.sort(dimensions);	// So length will be equal to :	// dimensions[dimensions.length-1]);	// because it's the last value (sorted in ascending order)

[Tomtstic]

Yea I think we're missing some brackets here, you can put your code in-between the CODE tags. Also you need to be more specific about what doesn't work, and what is your question.

But for starter, I can tell you a good way to find out the length would be to use arrays :

int[ ] dimensions = { d1, d2, d3 } ;

Arrays.sort(dimensions);

// So length will be equal to :

// dimensions[dimensions.length-1]);

// because it's the last value (sorted in ascending order)

Thanks for the tips. I will try them.