Write a class (and a client class to test it) that encapsulates statistics for s

Question

Write a class (and a client class to test it) that encapsulates statistics for summer job salaries for a group of people over several years. Your only instance variable should be a two-dimensional array of values representing salaries. Dimension 1 represents the people and dimension 2 represents the year of the summer job. Your constructor can simply take two integers representing the number of people and the number of years, then randomly generate the salaries and fill the array. You should include the following methods:

Overloaded Constructor, accessor, mutator, toString(), and equals()

A method returning the index of the person having made the most money over the years

A method returning the year when the highest salary was earned

A method returning the total amount of money made by all the people over the years

Explanation / Answer

SalaryStatistics.java

import java.util.Arrays;
import java.util.Random;

public class SalaryStatistics {
   // Declaring instance variable
   private int sal[][];

   // Parameterized constructor
   public SalaryStatistics(int no_of_people, int no_of_years) {
       super();
       this.sal = new int[no_of_people][no_of_years];
       Random r = new Random();
       for (int i = 0; i < no_of_people; i++) {
           for (int j = 0; j < no_of_years; j++) {
               sal[i][j] = r.nextInt((75000 - 30000) + 1) + 30000;
           }
       }

   }

   // Zero argumented constructor
   public SalaryStatistics() {
       super();

   }

   // Getters and setters
   public int[][] getSal() {
       return sal;
   }

   public void setSal(int[][] sal) {
       this.sal = sal;
   }

   /*
   * this method will return the index of person who earned most salary over
   * the years
   */
   public int mostMoneyPersonIndex() {
       int sum = 0;
       int index = 0;
       int personTotalSal[] = new int[sal.length];
       int max;
       for (int i = 0; i < sal.length; i++) {
           sum = 0;
           for (int j = 0; j < sal[0].length; j++) {
               sum += sal[i][j];
           }

           personTotalSal[i] = sum;
       }
       max = personTotalSal[0];
       for (int i = 0; i < personTotalSal.length; i++) {
           if (max < personTotalSal[i]) {
               max = personTotalSal[i];
               index = i;
           }
       }

       return index;
   }

   /*
   * This method will return in which year the person receiver the highest
   * salary
   */
   public int highestSalaryYear() {
       int max = sal[0][0];
       int year = 0;
       for (int i = 0; i < sal.length; i++) {
           for (int j = 0; j < sal[0].length; j++) {
               if (max < sal[i][j]) {
                   max = sal[i][j];
                   year = j;
               }
           }
       }
       return year;
   }

   // This method will return the total salary earned by all the people
   public int totalMoney() {

       int sum = 0;
       for (int i = 0; i < sal.length; i++) {
           for (int j = 0; j < sal[0].length; j++) {
               sum += sal[i][j];
           }
       }
       return sum;
   }

   // This method will display all persons salary over the years
   @Override
   public String toString() {
       for (int i = 0; i < sal.length; i++) {
           for (int j = 0; j < sal[0].length; j++) {
               System.out.print(sal[i][j] + " ");
           }
           System.out.println();
       }
       return "";
   }

   @Override
   public boolean equals(Object obj) {
       if (this == obj)
           return true;
       if (obj == null)
           return false;
       if (getClass() != obj.getClass())
           return false;
       SalaryStatistics other = (SalaryStatistics) obj;
       if (!Arrays.deepEquals(sal, other.sal))
           return false;
       return true;
   }

}

___________________

Test.java

import java.util.Scanner;

public class Test {

   public static void main(String[] args) {

       //Declaring variables
       int no_of_people, no_of_years;
       //Scanner object is used to get the inputs entered by the user
       Scanner sc=new Scanner(System.in);
      
       //Getting the inputs entered by the user
       System.out.print("Enter the no of people :");
       no_of_people=sc.nextInt();
       System.out.print("Enter the no of Years :");
       no_of_years=sc.nextInt();
      
       //Creating the Class object
   SalaryStatistics ss=new SalaryStatistics(no_of_people, no_of_years);
  
   //Displaying the salaries of all persons
   System.out.println("Displayiong the salaries of the persons in each year :");
   ss.toString();
  
System.out.println("Index of the Person who made highest salary over the years is "+(ss.mostMoneyPersonIndex()+1));
System.out.println("The year when the highest salary was earned :"+(ss.highestSalaryYear()+1));
System.out.println("Total money earned by all the persons is :"+ss.totalMoney());
   }

}

______________________

Output:

Enter the no of people :5
Enter the no of Years :6
Displayiong the salaries of the persons in each year :
49261 73511 30654 44701 41727 74210
38144 64184 67407 61341 34686 37533
66751 57445 69423 72853 47341 50107
43635 30956 54350 68140 53215 73289
33066 59988 42001 66310 37188 68989
Index of the Person who made highest salary over the years is 3
The year when the highest salary was earned :6
Total money earned by all the persons is :1612406

______________Thank You

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