Question

Code a complete Java program for the following payroll application:

First, hard code the following data for the object ‘Employee’ into 4 separate arrays:

SSN: 478936762, 120981098, 344219081, 390846789, 345618902, 344090917

First name      : Robert, Thomas, Tim, Lee, Young, Ropal

Last name       : Donal, Cook, Safrin, Matlo, Wang, Kishal

Hourly rate     : 12.75, 29.12, 34.25, 9.45,   20.95, 45.10

Hours worked: 45,        40,        39,       20,      44,        10

These 4 arrays must be declared inside the class and not within any method.

Also, declare a 5^th array that will store the gross salaries of all har coded employees.

Steps:

-Code a menu in a method with the following options:

-1-Display all employees

-2-Search for an employee by SSN

-3-Display the employee record with the largest gross salary

-4-Display the employee record with the smallest gross salary

-5-Quit program

-Code a method that calculate the gross salaries for all employees (this method should be called earlier).

-Code a method that display a given employee record.

-Code a method that search for a given employee (when found you need to call the display method)

-Code a method that determine the max salary

-Code a method that determines the smallest salary.

The overall design is up to you, but do consider the following:

-is the SSN a String or an int?

-option 3 and 4 should not be enabled if the salary was not calculated first.

-Implement all checks and control (i.e. accept only valid options in the menu).

-Code a switch…case instead of the if..else

-Of course this program needs to repeat until user decides to quit.

Xtra credits:

-increase the size of all arrays to 100…in this case only the first 6 entries are filled still.

-add an option to the menu (i.e. get an employee) a new employee data will be added at the end of a given array (don’t forget to keep a count of how any entered so far)

-Code a method that calculate and displays the total payroll for all employees..but, of course, you need to tally all salaries first

Answer 1

import java.util.Scanner;

class Employee{

    static int[] SSN = new int[100];
    static String[][] name = new String[100][2];
    static double[] h_rate = new double[100];
    static int[] h_worked = new int[100];
    static double[] gross = new double[100];

  
  
    static int tot_emp = 6;
  
    static void initial_values(){
  
    SSN[0] = 478936762;
    SSN[1] = 120981098;
    SSN[2] = 344219081;
    SSN[3] = 390846789;
    SSN[4] = 345618902;
    SSN[5] = 344090917;
  
    name[0][0] = "Robert";
    name[0][1] = "Donal";
  
    name[1][0] = "Thomas";
    name[1][1] = "Cook";
  
    name[2][0] = "Tim";
    name[2][1] = "Safrin";
  
    name[3][0] = "Lee";
    name[3][1] = "Matlo";
  
    name[4][0] = "Young";
    name[4][1] = "Wang";
  
    name[5][0] = "Ropal";
    name[5][1] = "Kishal";
  
    h_rate[0] = 12.75;
    h_rate[1] = 29.12;
    h_rate[2] = 34.25;
    h_rate[3] = 9.45;
    h_rate[4] = 20.95;
    h_rate[5] = 45.10;
  
    h_worked[0] = 45;
    h_worked[1] = 40;
    h_worked[2] = 39;
    h_worked[3] = 20;
    h_worked[4] = 44;
    h_worked[5] = 10;
  
    //calculate gross salary
    for (int i = 0;i<tot_emp;i++)
   {
      gross[i] = h_rate[i] * h_worked[i];
   }
  
    }

    static void func1(){

   System.out.println("All Employees Detail");
  
   for (int i = 0;i<tot_emp;i++)
   {
       System.out.println("SSN "+SSN[i]+" Employee Name "+name[i][0]+" "+name[i][1]+ " Hourly Rate: "+h_rate[i]+" Hours Worked "+h_worked[i]+ " Gross Salary: "+ gross[i]);
   }

    }

    static void func2(){
   System.out.println("Enter SSN to search");
  
   Scanner in = new Scanner(System.in);
   int ssn_search = in.nextInt();
   int found = 0;
  
   for (int i = 0;i<tot_emp;i++)
   {
       if(ssn_search == SSN[i])
        {
          System.out.println("SSN "+SSN[i]+" Employee Name "+name[i][0]+" "+name[i][1]+ " Hourly Rate: "+h_rate[i]+" Hours Worked "+h_worked[i]+ " Gross Salary: "+ gross[i]);
          found = 1;
          break;
        }
   }

   if(found==0)
      System.out.println("The SSN doesn't exist");

    }

    static void func3(){
   System.out.println("Employee Record With Largest Salary:");
  
   double max = gross[0];
   int pos = 0;
   for(int i=1;i<tot_emp;i++)
   {
      if(max<gross[i])
      {
        max = gross[i];
        pos = i;
      }
   }
  
   System.out.println("SSN "+SSN[pos]+" Employee Name "+name[pos][0]+" "+name[pos][1]+ " Hourly Rate: "+h_rate[pos]+" Hours Worked "+h_worked[pos]+ " Gross Salary: "+ gross[pos]);

    }

    static void func4(){
   System.out.println("Employee Record With Smallest Salary:");
  
   double min = gross[0];
   int pos = 0;
   for(int i=1;i<tot_emp;i++)
   {
      if(min>gross[i])
      {
        min = gross[i];
        pos = i;
      }
   }
  
   System.out.println("SSN "+SSN[pos]+" Employee Name "+name[pos][0]+" "+name[pos][1]+ " Hourly Rate: "+h_rate[pos]+" Hours Worked "+h_worked[pos]+ " Gross Salary: "+ gross[pos]);

    }
  
    static void func5(){
       System.out.println("Enter Info for New Employee");
       Scanner in = new Scanner(System.in);
      
      
       System.out.println("Enter SSN of new Employee");
       SSN[tot_emp] = in.nextInt();
       in.nextLine();   //to remove extra newline character in buffer
      
       System.out.println("Enter First Name of new Employee");
       name[tot_emp][0] = in.nextLine();
      
       System.out.println("Enter Last Name of new Employee");
       name[tot_emp][1] = in.nextLine();
      
       System.out.println("Enter Hourly Rate of new Employee");
       h_rate[tot_emp] = in.nextDouble();
      
       System.out.println("Enter Hours Worked of New Employee");
       h_worked[tot_emp] = in.nextInt();
      
       //calculate gross for new employee
       gross[tot_emp] = h_rate[tot_emp] * h_worked[tot_emp];
              
       tot_emp++;
    }

    static void func6(){
  
   System.out.println("Press any key to continue");
   Scanner in = new Scanner(System.in);
   String choice = in.nextLine();
   System.out.println("Bye!!!");
   System.exit(0);

    }

    public static void main(String args[]){

   int choice;
  
   initial_values();
  
   while(true){
  
        System.out.println("---------------------------------");
        System.out.println();
        System.out.println();
        System.out.println();
        System.out.println();
        System.out.println("1-Display all Employees");
        System.out.println("2-Search for an Employee by SSN");
        System.out.println("3-Display the employee record with largest gross salary ");
        System.out.println("4-Display the employee record with lowest salary");
        System.out.println("5-Add a new employee");
        System.out.println("6-Quit");
        System.out.println();
        System.out.println();
        System.out.println();
        System.out.println();
        System.out.println("Enter your choice");

        Scanner in = new Scanner(System.in);
        choice = in.nextInt();

        switch(choice){

        case 1:
       func1();
       break;
        case 2:
       func2();
       break;

        case 3:
       func3();
       break;

        case 4:
       func4();
       break;
      
        case 5:
             func5();
             break;

        case 6:
       func6();
       break;
        default:
       System.out.println("Enter Correct Choice");
        }

   }

    }

}