Question

I was wondering if I could get some help with a Java Program that I am currently working on for homework. When I run the program in Eclipse nothing shows up in the console can you help me out and tell me if I am missing something in my code or what's going on?

In this assignment, you are to create a class named Payroll. In the class, you are to have the following data members: name: String (5 pts) .İd: String (5 pts) hours: int (5 pts) rate: double (5 pts) private members (5 pts) You are to create no-arg and parameterized constructors and the appropriate setters(accessors) and getters (mutators). (20 pts) The class definition should also handle the following exceptions: An employee name should not be empty, otherwise an exception should be thrown. (10 pts) An employee id should have the form LLNNNN. If that form is not received, an exception should be thrown. (10 pts) thrown otherwise. (10 pts) thrown otherwise. (10 pts) An employee's hours should neither be negative nor greater than 84. An exception should be An employee's pay rate should neither be negative nor greater than 25.00. An exception should be Demonstrate this class in a program (separate class or in the same class). (5 pts) The exception messages should be appropriate to the specific exception that has occurred. (5 pts) Create a package payrol1 for the project. (5 pts)

My Code:

public class Payroll {

public static void main(String[] args) {

}

// TODO Auto-generated method stub

private int[] employeeId = { 5658845, 4520125, 7895122, 8777541, 8451277, 1302850, 7580489 };

private int[] hours = new int[7];

private double[] payrate = new double[7];

private double[] wages;

/**

* Iterates through the wages array setting each element to the product of its corresponding

* values in the hours and payRate arrays.

*/

public void calculateWages()

{

wages = new double[7];

for (int index = 0; index < 7; index++)

{

wages[index] = hours[index] * payrate[index];

}

}

public int getEmployeeId(int index)

{

return employeeId[index];

}

public int[] getHours()

{

return hours;

}

public int getHours(int index)

{

return hours[index];

}

public double[] getPayrate()

{

return payrate;

}

public double getPayrate(int index)

{

return payrate[index];

}

/**

* Finds the wage of an employee and returns it.

*

* @param id The employee's ID

* @return The wage of the employee whose ID was given. Returns -1 if no employee was found.

*/

public double getWage(int id)

{

for (int index = 0; index < 7; index++)

{

if (id == employeeId[index])

{

return wages[id];

}

}

return -1;

}

public double[] getWages()

{

return wages;

}

public double getWages(int index)

{

return wages[index];

}

public void setEmployeeId(int index, int employeeId)

{

this.employeeId[index] = employeeId;

}

public void setHours(int index, int hours)

{

this.hours[index] = hours;

}

public void setPayRate(int index, double payRate)

{

this.payrate[index] = payRate;

}

public void setWages(int index, double wages)

{

this.wages[index] = wages;

}

}

Answer 1

solution:

File: Payroll.java

// Payroll class implementation
package payroll;
public class Payroll
{
   // private members
   private String name;
   private String id;
   private int hours;
   private double rate;
  
   // no-arg constructor implementation
   public Payroll()
   {
       name = "";
       id = "";
       hours = 0;
       rate = 0.0;
   }
  
   // parameterized constructor implementation
   public Payroll(String aname, String aid, int ahours, double arate)
   {
       setName(aname);
       setId(aid);
       setHours(ahours);
       setRate(arate);
   }

   // setters
  
   // setName method implementation
   public void setName(String aname)
   {
       if(aname.equals(""))
       {
           throw new IllegalArgumentException("Employee's name should not be empty!");
       }
          
       name = aname;
   }

   // setId method implementation
   public void setId(String aid)
   {      
       if(aid.length() != 6 || !Character.isLetter(aid.charAt(0)) || !Character.isLetter(aid.charAt(1))
               || !Character.isDigit(aid.charAt(2)) || !Character.isDigit(aid.charAt(3))
               || !Character.isDigit(aid.charAt(4)) || !Character.isDigit(aid.charAt(5)))
       {
           throw new IllegalArgumentException("Employee's id should have the form LLNNNN!");
       }
      
       id = aid;
   }
  
   // setHours method implementation
   public void setHours(int ahours)
   {
       if(ahours < 0 || ahours > 84)
       {
           throw new IllegalArgumentException("Employee's hours should neither be negative nor greater than 84!");
       }
      
       hours = ahours;
   }

   // setRate method implementation
   public void setRate(double arate)
   {
       if(arate < 0 || arate > 25.00)
       {
           throw new IllegalArgumentException("Employee's pay rate should neither be negative nor greater than 25.00!");
       }
      
       rate = arate;
   }

   // getters
  
   // getName method implementation
   public String getName()
   {
       return name;
   }

   // getId method implementation
   public String getId()
   {
       return id;
   }

   // getHours method implementation
   public int getHours()
   {
       return hours;
   }

   // getRate method implementation
   public double getRate()
   {
       return rate;
   }
  
} // end of Payroll class

File: PayrollDemo.java

// PayrollDemo class implementation
package payroll;
public class PayrollDemo
{
   // start main method
   public static void main(String[] args)
   {
       // create an object for the Payroll class
       Payroll pr = new Payroll();
      
       // test the setter method
       pr.setName("Joseph Li");
       pr.setId("JL3699");
       pr.setHours(36);
       pr.setRate(18.36);
      
       // test the getter method
       System.out.println("Detailes of Payroll...");
       System.out.println("Name: " + pr.getName());
       System.out.println("ID: " + pr.getId());
       System.out.println("Hours: " + pr.getHours());
       System.out.println("Pay rate: " + pr.getRate());      
   } // end of main method
} // end of PayrollDemo class