Help a newbie with some Java code please?

[KosherTurkey]

Okay. I am very new to Java and I am very excited about it. However, I have hit a brick wall. I have a couple of questions about my code.

1. How can I make the program print a blank space in between the ****RESIDENTIAL ....***** and Max number of customers....?

2. I want the program to say at the end - Cost for residential customer 1: is $ ---- then customer 2: is $ ------then customer 3: is $..... -----My code is only saying that "Gas used by residential customer 4444" This is just an example. I hope I made this question clear.

Here is the first part of my code that will compile but I have the problems above:

import java.io.*;

import java.text.DecimalFormat;

public class lab5
{
    public static void main(String[] args)
    {
        int resAmounts = 0;
        int busAmounts = 0;
        double resCosts = 0;
        double busCosts = 0;
        int[] resAmount = new int[20]; // Cubic meters - residential
        int[] busAmount = new int[20]; // Cubic meters - business
        int[] planNumber = new int[20]; // Plan numbers - business
        double[] resCost = new double[20]; // Residential costs
        double[] busCost = new double[20]; // Business costs
        System.out.println("*******RESIDENTIAL CUSTOMER ACCOUNTS*******");
        int numCust = inputNumCust(); // Call to get number of customers
        getResAmounts(numCust, resAmount); // Call to get Residential amounts
        getResCosts(numCust, resAmount, resCost); // Call to get Residential costs
        System.out.println("Cost for Residential customer " + numCust + " " + ": is" + resCosts[j]);
    } // End of Main

    public static int inputNumCust()
    {
        int max = 20, numCust = 0;
        System.out.println("Max number of customers allowed is " + max);
        do
        {
            System.out.println("Enter number of customers:");
            numCust = MyInput.readInt();
        }while(numCust > 20);
        System.out.println("Number of customers read as: " + numCust);
        return (numCust);
    } // End of InputNumCust

public static void getResAmounts(int numCust, int [] resAmount)
    {
        System.out.println("......Natural Gas Residential Usage........");
        for(int i = 0; i < numCust; i++)
        {
            {
                System.out.println("Enter meter reading for previous month (less than 9999):");
                int starting = MyInput.readInt();
                System.out.println("Enter meter reading for current month (less than 9999):");
                int ending = MyInput.readInt();
                resAmount[i] = ending - starting;
                if (resAmount[i] < 0)
                {
                    resAmount[i] = 10000 - starting + ending;
                }
                System.out.println("Gas used (cubic meters) by Residential customer " + numCust() + " " + resAmount[i] + " ");
            }
        }
    }

Now here is the part of my code that will not compile::: Please help with this! Please!

public static void getResCosts(int numCust, int [] resAmount, double [] resCost)
    {
        System.out.println("......Natural Gas Residential Costs........");
        for(int j = 0; j < numCust; j++)
        {
            if (resAmount[] <= 70)
            {
                resCost[j] = 5.00;
            }
            else if ((resAmount[] > 70) && (resAmount[i] <= 170))
            {
                resAmount[] = resAmount[] - 70;
                resCost[j] = 5.00 + (resAmount[] * .05);
            }
            else if ((resAmount[] > 170) && (resAmount[] <= 400))
            {
                resAmount[] = resAmount[i] - 170;
                resCost[j] = 10.00 + (resAmount[] * .025);
            }
            else
            {
                resAmount[] = resAmount[] - 400;
                resCost[j] = 15.75 + (resAmount[] * .015);
            }
            System.out.println("Cost for Residential customer numCust() is " + resCost);
        }
    }

} // End of Class

Any help?
Thank you in advance

[yni420]

1. How can I make the program print a blank space in between the ****RESIDENTIAL ....***** and Max number of customers....?

At present the output should be like this
*****Residential.......**********
Max number of customers...........
rt?
you want it in the same line is it instead of a new line

instead of using println which prints in a new line use print in the print statement for max no of customers and add " "

2) System.out.println("Cost for Residential customer " + numCust + " " + ": is" + resCosts[j]);
this is written inside the main.
how will the program get the value of numCust and j.
put it in a loop
for(j=0;j<numcust;j++)
{
System.out.println("Cost for Residential customer " + numCust + " " + ": is" + resCosts[j]);
}

3) resAmount[] <= 70

everywhere you have used resAmount[] like this try adding j that is use resAmount[j] instead.

i dont have java installed so could not make the changes and try out.
this should do.....
just post here if it does not

[KosherTurkey]

Okay, here is my complete code...It still is giving me compile errors in the getResCosts method:

import java.io.*;

import java.text.DecimalFormat;

public class lab5
{
    public static void main(String[] args)
    {
        int resAmounts = 0;
        int busAmounts = 0;
        double resCosts = 0;
        double busCosts = 0;
        int[] resAmount = new int[20]; // Cubic meters - residential
        int[] busAmount = new int[20]; // Cubic meters - business
        int[] planNumber = new int[20]; // Plan numbers - business
        double[] resCost = new double[20]; // Residential costs
        double[] busCost = new double[20]; // Business costs
        System.out.println("*******RESIDENTIAL CUSTOMER ACCOUNTS*******");
        int numCust = inputNumCust(); // Call to get number of customers
        getResAmounts(numCust, resAmount); // Call to get Residential amounts
        getResCosts(numCust, resAmount, resCost); // Call to get Residential costs
        System.out.println("Cost for Residential customer " + numCust + " " + ": is" + resCosts[j]);
        System.out.println("******BUSINESS CUSTOMER ACCOUNTS******");
        numCust = inputNumCust(); // Call to get Business amounts
        getBusAmounts(numCust, planNumber, busAmount);
        getBusCosts(numCust, planNumber, busAmount, busCost);
        System.out.println("Cost for Business customer " + numCust + " " + ": is" + busCosts[j]);
    } // End of Main

    public static int inputNumCust()
    {
        int max = 20, numCust = 0;
        System.out.println("Max number of customers allowed is " + max);
        do
        {
            System.out.println("Enter number of customers:");
            numCust = MyInput.readInt();
        }while(numCust > 20);
        System.out.println("Number of customers read as: " + numCust);
        return (numCust);
    } // End of InputNumCust

    public static void getResAmounts(int numCust, int [] resAmount)
    {
        System.out.println("......Natural Gas Residential Usage........");
        for(int i = 0; i < numCust; i++)
        {
                System.out.println("Enter meter reading for previous month (less than 9999):");
                int starting = MyInput.readInt();
                System.out.println("Enter meter reading for current month (less than 9999):");
                int ending = MyInput.readInt();
                resAmount[i] = ending - starting;
                if (resAmount[i] < 0)
                {
                    resAmount[i] = 10000 - starting + ending;
                }
                System.out.println("Gas used (cubic meters) by Residential customer " + numCust() + " " + resAmount[i] + " ");
        }
    }

    public static void getResCosts(int numCust, int [] resAmount, double [] resCost)
    {
        System.out.println("......Natural Gas Residential Costs........");
        for(int j = 0; j < numCust; j++)
        {
            if (resAmount[j] <= 70)
            {
                resCost[j] = 5.00;
            }
            else if ((resAmount[j] > 70) && (resAmount[j] <= 170))
            {
                resAmount[j] = resAmount[j] - 70;
                resCost[j] = 5.00 + (resAmount[j] * .05);
            }
            else if ((resAmount[j] > 170) && (resAmount[j] <= 400))
            {
                resAmount[j] = resAmount[j] - 170;
                resCost[j] = 10.00 + (resAmount[j] * .025);
            }
            else
            {
                resAmount[j] = resAmount[j] - 400;
                resCost[j] = 15.75 + (resAmount[j] * .015);
            }
            System.out.println("Cost for Residential customer numCust() is " + resCost(j) + " ");
        }
    }

    public static void getBusAmounts(int numCust, int [] planNumber, int [] busAmount)
    {
        System.out.println(".....NATURAL GAS BUSINESS USAGE .....");
        System.out.println("PLAN 1 - FOR LOW VOLUME USERS");
        System.out.println("PLAN 2 - FOR MEDIUM VOLUME USERS");
        System.out.println("PLAN 3 - FOR LARGE VOLUME USERS");
        System.out.println("PLAN 4 - FOR HIGHEST VOLUME USERS");
        for(int k = 0; k < numCust; k++)
        {
            System.out.println("Enter the plan number for customer :");
            int plan = MyInput.readInt();
            while ((plan < 1) || (plan > 4))
            {
                System.out.println("PLAN NUMBER ERRROR...PLEASE ENTER EITHER 1 OR 2 OR 3 OR 4");
                System.out.println("...NATURAL GAS BUSINESS USAGE PLANS...");
                System.out.println("PLAN 1 - FOR LOW VOLUME USERS");
                System.out.println("PLAN 2 - FOR MEDIUM VOLUME USERS");
                System.out.println("PLAN 3 - FOR LARGE VOLUME USERS");
                System.out.println("PLAN 4 - FOR HIGHEST VOLUME USERS");
                System.out.println("Enter the plan number:");
                plan = MyInput.readInt();
            }
            System.out.println("Enter meter reading for previous month (less than 9999):");
            int previous = MyInput.readInt();
            System.out.println("Enter meter reading for current month (less than 9999):");
            int current = MyInput.readInt();
            int amount = current - previous;
            if (amount < 0)
            {
                amount = 10000 - previous + current;
            }
            System.out.println("Gas used (cubic meters) by Business customer " + numCust() + " " + resAmount[i] + " ");
        }
    }

    public static void getBusCosts(int numCust, int [] planNumber, int [] busAmount, double [] busCost)
    {
        System.out.println("......Natural Gas Business Costs........");
        switch (planNumber)
        {
            case 1:
                cost = 200 + (.04 * amount);
                System.out.println("Cost is $" + cost);
                break;
            case 2:
                cost = 300 + (.035 * amount);
                System.out.println("Cost is $" + cost);
                break;
            case 3:
                cost = 350 + (.029 * amount);
                System.out.println("Cost is $" + cost);
                break;
            case 4:
                cost = 400 + (.024 * amount);
                System.out.println("Cost is $" + cost);
                break;
        }
    }

} // End of Class

Any help at all? Thank you.

[yni420]

what error message is coming?

[alpha_foobar]

I'd bet the compile error is this:

System.out.println("Cost for Residential customer numCust() is " + resCost(j) + " ");

it should be:

System.out.println("Cost for Residential customer numCust() is " + resCost[j] + " ");

because resCost is an array.