SOLVED Java NetBeans, :( I need help!

Nkay said:

Yes. Question.
They told us to use this formula to get the subnet mask.
I'm not too sure what I need to do.
I've split the octects into a,b,c and d..
but how do I implement the formula?

(((a x 256) + b) x 256 + c) x 256 + d

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Design, write in Java, test and document a program to calculate the average tax that can be collected from residents of a city.
The following table is to be used to calculate the tax payable by each person on their annual income:
Tax Boundary Tax Due Excess %
$6,000 $0 15.0%
$37,000 $4,650 30.0%
$80,000 $17,550 37.0%
$180,000 $54,550 45.0%
As an example, assume a resident’s annual income is $30,000. His/her tax due based on annual income (using the above table) is
0 + ($30,000 - $6,000) * 15% = $3,600
If a resident’s annual income is $50,000, his/her tax due based on annual income is
4,650 + ($50,000 - $37000) * 30% = $8,550
Similarly, if a resident’s annual income is $90,000, his/her tax due based on annual income is
17,550 + ($90,000 - $80000) * 37% = $21,250
Your program should first ask the user to enter the four tax boundaries (an integer or a float each), the four tax dues (an integer or a float each), and the excess tax rates (for example 15.0% is entered as
0.15, a float or a double). You have the freedom to format the display on how you want to get the information from the user. It should then ask the user to enter the name of the city (a string). After the tax rate information and the city name have been entered, the annual income for each resident can be entered. For each resident, the program should ask the user to enter the name (a string) and his/her annual income. It should then calculate the tax due and display the name of the person, his/her annual income
and tax due (a float or a double). The program should loop around until the user does not want to process any more residents. Choose a sensible way for the user to indicate that there are no more residents to process. When all residents have been processed, the program is to print out the name of the city, the number of residents processed, the average annual income of residents and the average amount of tax due from all residents.
The program should be well-structured and should have a reasonable set of methods in addition to the main method. It should use a good coding style, proper indentation, meaningful identifiers and appropriate comments throughout. Your program should also include a method (eg, StudentInfo( )) to output your student details (name, student number, mode of enrolment, tutor name, tutorial attendance day and time) at the start of
program results. Devise suitable test data to test your program. The test data together with test results (sample program output) should be submitted as part of your external documentation.

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package tax;

import java.util.Scanner;

public class Tax
{
static String city;
static String name;
static float income;
static float taxDue, taxBoundary, excessTax;
static float taxBoundary1, taxBoundary2, taxBoundary3, taxBoundary4;
static float taxDue1, taxDue2, taxDue3, taxDue4;
static float excessTax1, excessTax2, excessTax3, excessTax4;
static float answer1, answer2, answer3, answer4;


private static void Student_Info()
{
System.out.println("Name:");
System.out.println("Student ID: ");
System.out.println("Enrollment Mode:");
System.out.println("Lecturer: ");
System.out.println("Tutorial:");
}

private static void Input()
{


Scanner keyboard = new Scanner(System.in);
System.out.println("Please enter your first tax boundary: ");

taxBoundary1 = keyboard.nextFloat();
System.out.println("Please enter your second tax boundary: ");
taxBoundary2 = keyboard.nextFloat();
System.out.println("Please enter your third tax boundary: ");
taxBoundary3 = keyboard.nextFloat();
System.out.println("Please enter your fourth tax boundary: ");
taxBoundary4 = keyboard.nextFloat();
System.out.println("Please enter your first tax due: ");

taxDue1 = keyboard.nextFloat();
System.out.println("Please enter your second tax due: ");
taxDue2 = keyboard.nextFloat();
System.out.println("Please enter your third tax due: ");
taxDue3 = keyboard.nextFloat();
System.out.println("Please enter your fourth tax due: ");
taxDue4 = keyboard.nextFloat();

System.out.println("Please enter the first excess tax rate: (decimals)");
excessTax1 = keyboard.nextFloat();
System.out.println("Please enter the second excess tax rate: (decimals)");
excessTax2 = keyboard.nextFloat();
System.out.println("Please enter the third excess tax rate: (decimals)");
excessTax3 = keyboard.nextFloat();
System.out.println("Please enter the fourth excess tax rate: (decimals)");
excessTax4 = keyboard.nextFloat();

System.out.println("Please enter the name of your City: ");
city = keyboard.nextLine();
System.out.println("Please enter a resident's name: ");
name = keyboard.nextLine();
System.out.println("Please enter his/her annual income: ");
income = keyboard.nextFloat();

}


public static void Calculate1()
{

float difference = income - taxBoundary1;
float multiplication = difference*excessTax1;
answer1 = taxDue1 + multiplication;

System.out.println(answer1);
}


public static void Calculate2()
{

float difference = income - taxBoundary2;
float multiplication = difference*excessTax2;
answer2 = taxDue2 + multiplication;

System.out.println(answer2);
}


public static void Calculate3()
{

float difference = income - taxBoundary3;
float multiplication = difference*excessTax3;
answer3 = taxDue3 + multiplication;

System.out.println(answer3);
}

public static void Calculate4()
{

float difference = income - taxBoundary4;
float multiplication = difference*excessTax4;
answer4 = taxDue4 + multiplication;

System.out.println(answer4);
}



public static void main(String[] args)
{

Student_Info();
Input();


System.out.println("His/Her tax due based on annual income is: ");


if(income <= taxBoundary1 && income < 1)
{
Calculate1();
}
else if(income <= taxBoundary2 && income > taxBoundary1)
{
Calculate2();
}
else if(income <= taxBoundary3 && income > taxBoundary2)
{
Calculate3();

}
else
{
Calculate4();
}
}


}

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