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In Introduction To Java Programming

Java Program To Calculate Area Of A Hexagon

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The program below is the answer to Liang’s Introduction to Java Programming (9th Edition) Chapter 2 Exercise 2.16.

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/**<br /> *<br /> * @Author: Aghatise Osazuwa<br /> * Website: www.cscprogrammingtutorials.com<br /> *<br /> * Exercise 2.16 - Geometry: Area of a Hexagon<br /> *<br /> */ <br /><br />import java.util.Scanner;<br /><br />public class Ex02_16 {<br /><br />    public static void main(String[] args) {<br />        <br />        //Display Program Information<br />        System.out.println("This Program Calculates The Area Of A Hexagon.n");<br /><br />        //create Scanner <br />        Scanner input = new Scanner(System.in);<br /><br />        //prompt user to enter details<br />        System.out.println("Enter the length of a side of the hexagon:");<br />        double side = input.nextDouble();<br /><br />        //calculate area using the formula ((3√3) ÷ 2) * the square of the length of a side<br />        double area = ((3 * (Math.pow(3, 0.5))) / 2) * side * side;<br />        //format area to two decimal places<br />        area = (int) (area * 10000) / 10000.0;<br /><br />        //display the result<br />        System.out.println("The area of the hexagon is " + area + "n");<br />    }<br />}<br />

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In Introduction To Java Programming

Financial Application: Compound Value

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The program below is the answer to Liang’s Introduction to Java Programming (9th Edition) Chapter 2 Exercise 2.13.

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/**<br /> *<br /> * @Author: Aghatise Osazuwa<br /> * Website: www.cscprogrammingtutorials.com<br /> *<br /> * Exercise 2.13 - Financial Application: Compound Value<br /> *<br /> */ <br /><br />import java.util.Scanner;<br /><br />public class CompoundValue {<br /><br />    public static void main(String[] args) {<br />        <br />        //Display Program Information<br />        System.out.println("This Program Calculates The Compound Value Of An "<br />                + "Account After The Sixth Month.n");<br /><br />        //create Scanner <br />        Scanner input = new Scanner(System.in);<br /><br />        //prompt user to enter details<br />        System.out.println("Enter the monthly saving amount:");<br />        double savings = input.nextDouble();<br /><br />        //calculate the account value after the sixth month<br />        double firstMonth = savings * (1 + 0.00417);<br />        double secondMonth = (savings + firstMonth) * (1 + 0.00417);<br />        double thirdMonth = (savings + secondMonth) * (1 + 0.00417);<br />        double fourthMonth = (savings + thirdMonth) * (1 + 0.00417);<br />        double fifthMonth = (savings + fourthMonth) * (1 + 0.00417);<br />        double sixthMonth = (savings + fifthMonth) * (1 + 0.00417);<br /><br />        //format the sixth month to two decimal places<br />        sixthMonth = (int) (sixthMonth * 100) / 100.0;<br /><br />        //display the result<br />        System.out.println("After the sixth month, the account value is $"<br />                + sixthMonth + "n");<br />    }<br />}<br />

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In Introduction To Java Programming

Physics: Finding Runway Length

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The program below is the answer to Liang’s Introduction to Java Programming (9th Edition) Chapter 2 Exercise 2.12.

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/**<br /> *<br /> * @Author: Aghatise Osazuwa<br /> * Website: www.cscprogrammingtutorials.com<br /> *<br /> * Exercise 2.12 - Physics: Finding Runway Length<br /> *<br /> */ <br /><br />import java.util.Scanner;<br /><br />public class RunwayLength {<br /><br />    public static void main(String[] args) {<br />        <br />        //Display Program Information<br />        System.out.println("This Program Calculates The Minimum Runway Length "<br />                + "Needed For An Airplane To Take Off.n");<br /><br />        //create Scanner <br />        Scanner input = new Scanner(System.in);<br /><br />        //prompt user to enter details<br />        System.out.println("Enter speed (in meters per second) and "<br />                + "acceleration (in meters/second squared):");<br />        double speed = input.nextDouble();<br />        double acceleration = input.nextDouble();<br /><br />        //calculate length <br />        double length = ((speed * speed) / (2 * acceleration));<br />        <br />        //format length to 4 decimal places<br />        length = (int)(length * 10000) / 10000.0;<br /><br />        //display the result<br />        System.out.println("The minimum runway length for this airplane is "<br />                + length + "n");<br />    }<br />}<br />

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In Introduction To Java Programming

Java Population Projection Calculator

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The program below is the answer to Liang’s Introduction to Java Programming (9th Edition) Chapter 1 Exercise 1.11.

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/**<br /> *<br /> * @Author: Aghatise Osazuwa<br /> * Website: www.cscprogrammingtutorials.com<br /> *<br /> * Exercise 1.11 - Population Projection<br /> *<br /> */ <br /><br />import java.util.Scanner;<br /><br />public class PopulationProjection {<br /><br />    public static void main(String[] args) {<br />        <br />                int birth = 7;<br />  int death = 13;<br />  int immigrant = 45;<br />  int currentPopulation = 312032486;<br />  int year = 365;<br />  int yearlyBirths = (((60 * 60 * 24 * year) / birth));<br />  int yearlyDeaths = (((60 * 60 * 24 * year) / death));<br />  int yearlyImmigrants = (((60 * 60 * 24 * year) / immigrant));<br />  int yearlyPopulation = (yearlyBirths + yearlyImmigrants - yearlyDeaths);<br /><br />  System.out.println("Current Year Population = " + currentPopulation);<br />  System.out.println("Next Year's Population = "<br />    + (currentPopulation + yearlyPopulation));<br />  System.out.println("Next Two Year's Population = "<br />    + (currentPopulation + (yearlyPopulation * 2)));<br />  System.out.println("Next Three Year's Population = "<br />    + (currentPopulation + (yearlyPopulation * 3)));<br />  System.out.println("Next Four Year's Population = "<br />    + (currentPopulation + (yearlyPopulation * 4)));<br />  System.out.println("Next Five Year'ss Population = "<br />    + (currentPopulation + (yearlyPopulation * 5)));<br />    }<br />}<br />

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In Java

Multiplication Table Program In Java Using Array

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This is a simple Java program to produce a 12×12 multiplication table using 2-dimensional array.

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/**<br /> *<br /> * @Author: Aghatise Osazuwa<br /> * Website: www.cscprogrammingtutorials.com<br /> *<br /> */ <br /><br />public class ArrayMultiplicationTable {<br /><br />    public static void main(String[] args) {<br />        int[][] demo = new int[12][12];<br />        int row = 1, column = 1;<br />        for (int x = 0; x &lt; demo.length; x++) {<br />            for (int y = 0; y &lt; demo[x].length; y++) {<br />                demo[x][y] = row * column;<br />                column = column + 1;<br />            }<br />            row = row + 1;<br />            column = 1;<br />        }<br />        for (int x = 0; x &lt; demo.length; x++) {<br />            for (int y = 0; y &lt; demo[x].length; y++) {<br />                System.out.print("  " + demo[x][y] + "t|");<br />            }<br />            System.out.println();<br />        }<br />    }<br />}<br />

See program output below Program output

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