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‎src/Chapter06/Exercise0611_Financial_application_compute_commissions.java‎

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/**
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* (Financial application: compute commissions) Write a method that computes the
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* commission, using the scheme in Programming Exercise 5.39. The header of
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* the method is as follows:
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* public static double computeCommission(double salesAmount)
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* Write a test program that displays the following table:
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* Sales Amount Commission
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* 10000 900.0
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* 15000 1500.0
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* ...
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* 95000 11100.0
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* 100000 11700.0
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*
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* Created by Sven on 07/07/19.
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*/
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package Chapter06;
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public class Exercise0611_Financial_application_compute_commissions {
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public static void main(String[] args) {
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System.out.println("Sales Amount Commission");
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System.out.println("--------------------------");
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for (int i = 10000; i <= 100000; i += 5000) {
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System.out.printf("%-16d%10.1f\n", i, computeCommission(i));
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}
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}
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public static double computeCommission(double salesAmount) {
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double commission = 0.0;
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if (salesAmount > 10000.0) {
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commission = 700.0 + (salesAmount - 10000.0) * 0.1;
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} else if (salesAmount > 5000.0) {
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commission = 300.0 + (salesAmount - 5000.0) * 0.08;
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} else {
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commission = salesAmount * 0.06;
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}
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return commission;
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}
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}

‎src/Chapter06/Exercise0612_Display_numbers.java‎

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/**
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* (Display numbers) Write a method that prints numbers using the following header:
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* public static void printNumbers(int num1, int num2, int
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* numberPerLine)
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* This method prints the characters between num1 and num2 with the specified
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* numbers per line. Write a test program that prints ten characters per line from 1
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* to 100. Numbers are separated by exactly one space.
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*
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* Created by Sven on 07/07/19.
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*/
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package Chapter06;
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public class Exercise0612_Display_numbers {
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public static void main(String[] args) {
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printNumbers(1, 100, 10);
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}
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public static void printNumbers(int num1, int num2, int numberPerLine) {
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int count = 0;
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for (int i = num1; i <= num2; i++) {
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System.out.print(i + " ");
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count++;
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if (count % numberPerLine == 0) {
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System.out.println();
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}
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}
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}
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}

‎src/Chapter06/Exercise0613_Sum_series.java‎

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/**
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* (Sum series) Write a method to compute the following series:
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* m(i) = 1/3 +2/4 + ... + i/i+2
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* Write a test program that displays the following table:
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* I m(i)
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* 1 0.3333
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* 2 0.8333
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* ...
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* 19 14.7093
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* 20 15.6184
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*
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* Created by Sven on 07/07/19.
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*/
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package Chapter06;
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public class Exercise0613_Sum_series {
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public static void main(String[] args) {
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System.out.println("i m(i)");
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System.out.println("---------");
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for (int i = 1; i <= 20; i++) {
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System.out.printf("%-5d%.4f\n", i, computeSum(i));
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}
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}
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public static double computeSum(int i) {
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double sum = 0.0;
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for (int j = 1; j <= i; j++) {
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sum += (double) j / (double) (j + 2);
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}
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return sum;
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}
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}

‎src/Chapter06/Exercise0614_Estimate_PI.java‎

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/**
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* (Estimate p) p can be computed using the following summation:
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* m (i) = 4 (1 - 1/3 + 1/5 - 1/7 + 1/9 - 1/11 + ... + ((-1)^(i+1))/(2i-1))
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* Write a method that returns m(i) for a given i and write a test program that
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* displays the following table:
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* i m(i)
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* 1 4.0000
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* 101 3.1515
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* 201 3.1466
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* 301 3.1449
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* 401 3.1441
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* 501 3.1436
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* 601 3.1433
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* 701 3.1430
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* 801 3.1428
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* 901 3.1427
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*
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* Created by Sven on 07/07/19.
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*/
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package Chapter06;
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public class Exercise0614_Estimate_PI {
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public static void main(String[] args) {
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System.out.println("i m(i)");
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System.out.println("---------");
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for (int i = 1; i <= 901; i += 100) {
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System.out.printf("%-5d%.4f\n", i, computePI(i));
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}
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}
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public static double computePI(int i) {
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double sum = 0.0;
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for (int j = 1; j <= i; j++) {
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sum += 4 * (Math.pow(-1, j + 1) / (2 * j - 1));
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}
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return sum;
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}
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}

‎src/Chapter06/Exercise0615_Financial_application_print_a_tax_table.java‎

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/**
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* (Financial application: print a tax table) Listing 3.5 gives a program to compute
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* tax. Write a method for computing tax using the following header:
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* public static double computeTax(int status, double taxableIncome)
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* Use this method to write a program that prints a tax table for taxable income from
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* $50,000 to $70,000 with intervals of $100 for all the following statuses:
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* Taxable Single Married Joint Married Head of
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* Income or Qualifying Separate a House
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* Widow(er)
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* 50000 8688 6665 8688 7353
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* 50100 8713 6680 8713 7378
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* ...
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* 69900 13663 9850 12328 9840
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* 70000 13688 9875 12353 9853
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* Hint: round the tax into integers using Math.round (i.e., Math
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* .round(computeTax(status, taxableIncome))).
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*
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* Created by Sven on 07/07/19.
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*/
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package Chapter06;
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public class Exercise0615_Financial_application_print_a_tax_table {
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public static void main(String[] args) {
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System.out.println("Taxable Income Single Married Joint or Qualifying Widow(er) Married Separate Head of a house");
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System.out.println("--------------------------------------------------------------------------------------------------------");
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for (int i = 50000; i <= 70000; i += 100) {
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System.out.printf("%-18d%-10d%-41d%-20d%d\n",
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i,
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Math.round(computeTax(0, i)),
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Math.round(computeTax(1, i)),
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Math.round(computeTax(2, i)),
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Math.round(computeTax(3, i)));
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}
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}
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public static double computeTax(int status, double taxableIncome) {
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double tax = 0;
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if (status == 0) { // Compute tax for single filers
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if (taxableIncome <= 8350)
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tax = taxableIncome * 0.10;
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else if (taxableIncome <= 33950)
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tax = 8350 * 0.10 + (taxableIncome - 8350) * 0.15;
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else if (taxableIncome <= 82250)
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tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (taxableIncome - 33950) * 0.25;
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else if (taxableIncome <= 171550)
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tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (82250 - 33950) * 0.25 + (taxableIncome - 82250) * 0.28;
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else if (taxableIncome <= 372950)
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tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (82250 - 33950) * 0.25 + (171550 - 82250) * 0.28 + (taxableIncome - 171550) * 0.33;
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else
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tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (82250 - 33950) * 0.25 + (171550 - 82250) * 0.28 + (372950 - 171550) * 0.33 + (taxableIncome - 372950) * 0.35;
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} else if (status == 1) { // Compute tax for married file jointly
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if (taxableIncome <= 16700)
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tax = taxableIncome * 0.10;
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else if (taxableIncome <= 67900)
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tax = 16700 * 0.10 + (taxableIncome - 16700) * 0.15;
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else if (taxableIncome <= 137050)
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tax = 16700 * 0.10 + (67900 - 16700) * 0.15 + (taxableIncome - 67900) * 0.25;
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else if (taxableIncome <= 208850)
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tax = 16700 * 0.10 + (67900 - 16700) * 0.15 + (137050 - 67900) * 0.25 + (taxableIncome - 137050) * 0.28;
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else if (taxableIncome <= 372950)
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tax = 16700 * 0.10 + (67900 - 16700) * 0.15 + (137050 - 67900) * 0.25 + (208850 - 137050) * 0.28 + (taxableIncome - 208850) * 0.33;
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else
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tax = 16700 * 0.10 + (67900 - 16700) * 0.15 + (137050 - 67900) * 0.25 + (208850 - 137050) * 0.28 + (372950 - 208850) * 0.33 + (taxableIncome - 372950) * 0.35;
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} else if (status == 2) { // Compute tax for married separately
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if (taxableIncome <= 8350)
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tax = taxableIncome * 0.10;
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else if (taxableIncome <= 33950)
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tax = 8350 * 0.10 + (taxableIncome - 8350) * 0.15;
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else if (taxableIncome <= 68525)
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tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (taxableIncome - 33950) * 0.25;
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else if (taxableIncome <= 104425)
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tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (68525 - 33950) * 0.25 + (taxableIncome - 68525) * 0.28;
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else if (taxableIncome <= 186475)
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tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (68525 - 33950) * 0.25 + (104425 - 68525) * 0.28 + (taxableIncome - 104425) * 0.33;
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else
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tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (68525 - 33950) * 0.25 + (104425 - 68525) * 0.28 + (186475 - 104425) * 0.33 + (taxableIncome - 186475) * 0.35;
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} else if (status == 3) { // Compute tax for head of household
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if (taxableIncome <= 11950)
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tax = taxableIncome * 0.10;
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else if (taxableIncome <= 45500)
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tax = 11950 * 0.10 + (taxableIncome - 11950) * 0.15;
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else if (taxableIncome <= 117450)
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tax = 11950 * 0.10 + (45500 - 11950) * 0.15 + (taxableIncome - 45500) * 0.25;
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else if (taxableIncome <= 190200)
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tax = 11950 * 0.10 + (45500 - 11950) * 0.15 + (117450 - 45500) * 0.25 + (taxableIncome - 117450) * 0.28;
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else if (taxableIncome <= 372950)
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tax = 11950 * 0.10 + (45500 - 11950) * 0.15 + (117450 - 45500) * 0.25 + (190200 - 117450) * 0.28 + (taxableIncome - 190200) * 0.33;
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else
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tax = 11950 * 0.10 + (45500 - 11950) * 0.15 + (117450 - 45500) * 0.25 + (190200 - 117450) * 0.28 + (372950 - 190200) * 0.33 + (taxableIncome - 372950) * 0.35;
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}
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return tax;
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}
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}

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