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Creating a Two-Dimension Array Using Java (Other (Not Listed) Sample)
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Computer Science
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Writing CSCI 1301 Homework #9
Due date: November 5, 2023 (Sunday), 11:59pm
Write a program that computes weekly hours for each employee. Store the weekly hours for all employees in a
two-dimensional array. Each row records an employee’s seven-day work hours with seven columns. For
example, the following array stores the work hours for eight employees. Display employees and the total hours
of each employee in decreasing order of the total hours.
Su M T W R F Sa
Employee0 2 4 3 4 5 8 8
Employee1 7 3 4 3 3 4 4
Employee2 3 3 4 3 3 2 2
Employee3 9 3 4 7 3 4 1
Employee4 3 5 4 3 6 3 8
Employee5 3 4 4 6 3 4 4
Employee6 3 7 4 8 3 8 4
Employee7 6 3 5 9 2 7 9
Requirements:
1. Design a method that takes the 2-D array of weekly hours of all employees as an input parameter,
calculates the sum of the total hours of all employees and returns the total hour results in an array.
2. Design a method to sort the above returned array in Requirement 1 in descending order by selection sort.
* Important: when sorting the array, the program should keep track of which employee
corresponds to how many work hours. Therefore, you should store the employee information in
an array and return it as a result of your sort method.
3. Design a method to display the results of employees and their total hours in decreasing order. The
sample output for the above example is as follows:
4. Design a main method that uses the short hand initializer to initialize the 2-D array of weekly hours of
all employees and invokes all the three methods in Requirements 1-3 in a sequence.
Grading: This assignment is worth 100 points. If your program has compilation or run time errors, you will
receive 0 point.
Grade criteria Maximum points
Correct result and output
Proper implementation of all features specified in the program 80
Proper style and documentation * 20
* The requirement of proper style and documentation can be found in “Expanded Guidelines on
Programming Style and Documentation” document in the “Course Info” module in folio.
How to hand in the assignment
When you finish your assignment, you will upload (submit) it to Gradescope. I remind you that if you do not
submit the assignment before the due date, you will not be able to submit it.
1. Complete the assignment and name it HW9.
2. Return to the Gradescope to submit the .java file for this assignment.
3. Browse for the HW9.java file that you have on your computer and select it so that it uploads to the
assignment area.
4. Click “Upload”.
* For this assignment, please name your class file as “HW9”
package homework;
public class HW9 {
public static void main(String[] args) {
int[][] workHours = {
{2, 4, 3, 4, 5, 8, 8},
{7, 3, 4, 3, 3, 4, 4},
{3, 3, 4, 3, 3, 2, 2},
{9, 3, 4, 7, 3, 4, 1},
{3, 5, 4, 3, 6, 3, 8},
{3, 4, 4, 6, 3, 4, 4},
{3, 7, 4, 8, 3, 8, 4},
{6, 3, 5, 9, 2, 7, 9}
};
int[] sumArray = calculateSum(workHours);
int[] indexArray = decreasingSort(sumArray);
displayArray(indexArray, sumArray);
}
public static int[] calculateSum (int[][] array) {
//Please write your code here
}
public static int[] decreasingSort (int[] array) {
//Please write your code here
}
public static void displayArray (int[] indexArray, int[] array) {
/Please write your code here/
System.out.println("Employee" + indexArray[i] + ": " + array[i] + " hours");
}
* Finally, your code’s formatting should look exactly like the output mentioned below and should be able to
run/ compile.
Employee7: 41 hours
Employee6: 37 hours
Employee0: 34 hours
Employee4: 32 hours
Employee3: 31 hours
Employee5: 28 hours
Employee1: 28 hours
Employee2: 20 hours source..
Content:
Two-dimensional Array Employee Program.
Name
Date
Course
Part 1
The following is the program that calculates the weekly hours for each employee, stores them in a two-dimensional array, and displays the employees and their total hours in decreasing order.
Code
package homework;
import java.util.Arrays;
public class HW9 {
public static void main(String[] args) {
int[][] weekHours = {
{2, 4, 3, 4, 5, 8, 8},
{7, 3, 4, 3, 3, 4, 4},
{3, 3, 4, 3, 3, 2, 2},
{9, 3, 4, 7, 3, 4, 1},
{3, 5, 4, 3, 6, 3, 8},
{3, 4, 4, 6, 3, 4, 4},
{3, 7, 4, 8, 3, 8, 4},
{6, 3, 5, 9, 2, 7, 9}
};
String[] employeeNames = {"Employee0", "Employee1", "Employee2", "Employee3", "Employee4", "Employee5", "Employee6", "Employee7"};
int[] totalHours = calculateTotalHours(weekHours);
sortEmployeesByTotalHours(employeeNames, totalHours);
// The decreasing order of the employees and their total hours
System.out.println("Employee\tTotal Hours");
for (int i = 0; i < employeeNames.length; i++) {
System.out.println(employeeNames[i] + "\t" + totalHours[i]);
}
}
public static int[] calculateTotalHours(int[][] hoursArray) {
int[] totalHours = new int[hoursArray.length];
for (int i = 0; i < hoursArray.length; i++) {
for (int j = 0; j < hoursArray[i].length; j++) {
totalHours[i] += hoursArray[i][j];
}
}
return totalHours;
}
public static void sortEmployeesByTotalHours(String[] employeeNames, int[] totalHours) {
for (int i = 0; i < totalHours.length - 1; i++) {
for (int j = i + 1; j < totalHours.length; j++) {
if (totalHours[i] < totalHours[j]) {
int tempHours = totalHours[i];
totalHours[i] = totalHours[j];
totalHours[j] = tempHours;
String tempName = employeeNames[i];
employeeNames[i] = employeeNames[j];
employeeNames[j] = tempName;
}
}
}
}
}
Part 2
The following code provides a technique for determining the total number of hours and arranging workers based on their overall work hours through the employment of the selection sort algorithm while also monitoring employee details. This software computes each worker's cumulative working time, sorts them by their respective total hours worked using the descending order selection sorting method, and preserves all employee-related data in an array named "employeeNames."
Code
package homework;
import java.util.Arrays;
public class HW9 {
public static void main(String[] args) {
int[][] weekHours = {
{2, 4, 3, 4, 5, 8, 8},
{7, 3, 4, 3, 3, 4, 4},
{3, 3, 4, 3, 3, 2, 2},
{9, 3, 4, 7, 3, 4, 1},
{3, 5, 4, 3, 6, 3, 8},
{3, 4, 4, 6, 3, 4, 4},
{3, 7, 4, 8, 3, 8, 4},
{6, 3, 5, 9, 2, 7, 9}
};
String[] employeeNames = {"Employee0", "Employee1", "Employee2", "Employee3", "Employee4", "Employee5", "Employee6", "Employee7"};
int[] totalHours = calculateTotalHours(weekHours);
// Arrange the employees by total hours in descending order and get the sorted employee names
String[] sortedEmployeeNames = sortEmployeesByTotalHours(employeeNames, totalHours);
//The employees and their total hours in decreasing order
System.out.println("Employee\tTotal Hours");
for (int i = 0; i < sortedEmployeeNames.length; i++) {
int employeeIndex = Integer.parseInt(sortedEmployeeNames[i].substring(8)); // Extract the employee index
System.out.println(sortedEmployeeNames[i] + "\t" + totalHours[employeeIndex]);
}
}
public static int[] calculateTotalHours(int[][] hoursArray) {
int[] totalHours = new int[hoursArray.length];
for (int i = 0; i < hoursArray.length; i++) {
for (int j = 0; j < hoursArray[i].length; j++) {
totalHours[i] += hoursArray[i][j];
}
}
return totalHours;
}
public static String[] sortEmployeesByTotalHours(String[] employeeNames, int[] totalHours) {
int n = totalHours.length;
for (int i = 0; i < n - 1; i++) {
int maxIndex = i;
for (int j = i + 1; j < n; j++) {
if (totalHours[j] > totalHours[maxIndex]) {
maxIndex = j;
}
}
// employee names
String tempName = employeeNames[i];
employeeNames[i] = employeeNames[maxIndex];
employeeNames[maxIndex] = tempName;
// total hours
int tempHours = totalHours[i];
totalHours[i] = totalHours[maxIndex];
totalHours[maxIndex] = tempHours;
}
return employeeNames;
}
}
Part 3
The following is the code where the main method of this program employs shorthand initialization to initialize a 2-D array containing the weekly working hours of all employees. It then proceeds to calculate their total hours, sort them in desce...
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