Question

Write this in java please. I use Eclipse

Write the following two functions. main doesnt need to be filled up.

Function 1:

Write a function called howMany that takes two arguments: an array of integers called arr, and an integer called iTarget. The function should return an integer result. Inside the function write a loop to go through the array and count the number of elements in the array that have the same value as iTarget. At the end it should return the count as the function return value.

Function 2:

Write a function called endsIn that takes two arguments: a String and a character. The function should return true if the string ends in that character or else return false. (Only if the ending character of the string is the character passed in as an argument.)

You sell the book “JAVA for Fools”. Write a program that has you enter a years worth of monthly sales (in terms of money). Create an array of string objects initialized to the month strings. The program should use a loop to prompt you by month from this created array of months and storing the input data (sales numbers for each month) in an array of double. Then the program should find the sum of the array contents and report the total sales for the year.

The Kingdom of Mars, where the unit of currency is the Rock, has the following income tax code:

First 3,000 Rocks: 0% tax

Next 5,000 Rocks: 5% tax

Next 10,000 Rocks: 10% tax

Rocks after 18,000: 15% tax

For example, someone earning 30,000 Rocks would owe (3,000 × 0.00 + 5,000 × 0.05 + 10,000 × 0.10 + 12,000 × 0.15, or) 3,050 Rocks. Write a JAVA program that inputs incomes and calculates the tax owed in the Kingdom of Mars in Rocks.

Answer 1

Test1.java

public class Test1 {

   public static void main(String[] args) {
       // Test samples
       System.out.println(howMany(new int[] {1,2,3,2,3,1,1,1},1));
       System.out.println(endsIn("Hello",'o'));
       System.out.println(endsIn("Many",'o'));
   }

   public static int howMany(int arr[],int iTarget) {
       int count = 0;
       // Iterate over array
       // if value at index i = iTarget
       // Increment count by 1
       for(int i =0;i<arr.length;i++) {
           if(arr[i]==iTarget) {
               count+=1;
           }
       }
       // Return count
       return count;
   }
  
   public static boolean endsIn(String str,char ch) {
       // If char at last index = ch
       // return true
       // else false
       if(str.charAt(str.length()-1)==ch) {
           return true;
       }else {
           return false;
       }
   }
}

OUTPUT

YearSale.java

import java.util.Scanner;

public class YearSale {

   public static void main(String[] args) {
       // Scanner class object to take user input
       Scanner scan = new Scanner(System.in);
      
       // Create string array of months
       String[] months = new String[] {"January","February","March","April","May","June",
               "July","August","September","October","November","December"};
       // Create double array for sales
       double sales[] = new double[12];
      
       // Iterate loop for all month
       // take use input
       for(int i = 0;i<sales.length;i++) {
           System.out.print(months[i]+" sale: ");
           sales[i] = Double.parseDouble(scan.nextLine());
       }
       // Iterate loop over sales array
       // Add sales to totalSales
       double totalSales = 0;
       for(int i = 0;i<sales.length;i++) {
           totalSales+=sales[i];
       }
       // Print totalSales
       System.out.println("Total sales for the year is $"+totalSales);
   }
}

OUTPUT

Mars.java

import java.util.Scanner;

public class Mars {

   public static void main(String[] args) {
       // Scanner class object to take user input
       Scanner scan = new Scanner(System.in);

       // Ask user to enter income
       System.out.print("Enter income: ");
       double income = Double.parseDouble(scan.nextLine());
       // Assign income to temp variable
       double temp = income - 3000;
       double tax = 0;

       // If temp is between 0-5000
       // apply tax 0.05 on temp amount
       if (temp > 0 && temp <= 5000) {
           tax += temp * 0.05;
       }
       // If between 5000-10000
       // apply tax 0.05 on first 5000
       // then subtract 5000 from temp
       // apply tax 0.10 on remaining temp amount
       if (temp > 5000 && temp <= 18000) {
           tax += 5000 * 0.05;
           temp = temp - 5000;
           tax += temp * 0.10;
       }
      
       if (temp > 18000) {
           tax += 5000 * 0.05;
           temp = temp - 5000;
           tax += 10000 * 0.10;
           temp = temp - 10000;
           tax += temp * 0.15;
       }
       System.out.println(tax + " rocks owed");
   }
}

OUTPUT