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Thread: Java - Inheritance help!

  1. #1
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    Default Java - Inheritance help!

    Hi, can I please get some help with the following task. I've started the coding, although I have some of the methods I'm not sure on how to do (i.e the toString and equals)

    The task and other provided are below.
    Task.doc

    public class Employee
    {
        private String name;
     
        public Employee()
        {
     
        }
     
        public Employee(String employeeName)
        {
            name = employeeName;
        }
     
        public Employee(Employee Employee)
        {
     
        }
     
        public String getName()
        {
            return name;
        }
     
        public void setName(String employeeName)
        {
            this.name = employeeName;
        }
     
        public String toString()
        {   
             return name;
        }
     
        public boolean equals(Employee Object)
        {
     
        }
    }

    public class HourlyEmployee extends Employee
    {
        private double wageRate;
        private double hours;
     
        public HourlyEmployee()
        {
     
        }
     
        public HourlyEmployee(String name, double employeeWageRate, double employeeHours)
        {
            super(name);
            wageRate = employeeWageRate;
            hours = employeeHours;
        }
     
        public HourlyEmployee(Employee HourlyEmployee)
        {
     
        }
     
        public double getRate()
        {
            return wageRate;        
        }
     
        public double getHours()
        {
            return hours;
        }
     
        public double getPay()
        {
     
            return wageRate*hours;
        }
     
        public void setHours(double employeeHours)
        {
            this.hours = employeeHours;
        }
     
        public void setRate(double employeeWageRate)
        {
            this.wageRate = employeeWageRate;
        }
     
        public String toString()
        {
            return "Sam\n$50.5 per hour for 40.0 hours\n";
        }
     
    //     public boolean equals(Object)
    //     {
    //         
    //     }    
    }

    public class SalariedEmployee extends Employee
    {
        private double salary;
        public SalariedEmployee()
        {
     
        }
     
        public SalariedEmployee(String name, double employeeSalary)
        {
            super(name);
            salary = employeeSalary;
        }
     
        public SalariedEmployee(Employee SalariedEmployee)
        {
     
        }
     
        public double getSalary()
        {
            return salary;
        }
     
    //     public double getPay()
    //     {
    //         return ;
    //     }
     
        public void setSalary(double employeeSalary)
        {
            this.salary = employeeSalary;
        }
     
    //     public String toString()
    //     {
    //         return 
    //     }
     
    //     public boolean equals(Object Employee)
    //     {
    //         
    //     }
    }

    public class EmployeeDemo
    {
        public static void main(String[] args)
        {
            ArrayList<Employee> emplist = new ArrayList<Employee>();
            emplist.add(new SalariedEmployee("Josephine", 100000));
            emplist.add(new HourlyEmployee("Sam",50.50, 40.0));
     
            //this loop shows you how to call a public method in a superclass that all subclasses inherit from.   
            //this also shows how to call methods of individual sub classes.
            for(Employee aEmp: emplist)
            {
                System.out.println(aEmp.getName());
                    if(aEmp instanceof SalariedEmployee)
                    {
                        System.out.println("$" + ((SalariedEmployee) aEmp).getSalary() + " per year");
                    }
                    else if(aEmp instanceof HourlyEmployee)
                    {
                        System.out.print("$" + ((HourlyEmployee) aEmp).getRate() + " per hour for ");
                        System.out.println(((HourlyEmployee) aEmp).getHours() + " hours");
                    }
                    System.out.println();
            }
            //the following will produce the same output as above.
            //Note that System.out.println() calls the toString() method initially defined in class Object but
            //overridden by SalariedEmployee and HourlyEmployee classes.
            for(Employee aEmp: emplist)
            {
                System.out.println(aEmp +"\n");
            }
        }
    }
    Attached Images Attached Images


  2. #2
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    Default Re: Java - Inheritance help!

    Way too much code. This is what we need:

    - a description of what the toString() method should do
    - your current code for the toString() method
    - any questions or problems you're having with code you've posted

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