I need help with the following java project. I don't really understand the concepts.

 

 

import java.util.Scanner;

public class WorkerPay

{

  public static void main( String args [] )

  {

   WorkerPay worker = new WorkerPay(); // 1. Instantiate the object "worker" here using the

                      //  no-argument constructor:

// 2. Reference the method to prompt for inputs here:

// 3. Reference the method to display the results here:

  } // end main

  /*

   Students must fill in the code for the private instance fields

   and the two instance methods: grossPay, fedTax, and display.

   Declare the three private instance fields here: */

 

privatedoublehours;

privatedoublewageRate;

privateintindependents;

// Write the no-argument constructor here:

public WorkerPay ()

{              // initialize the instance fields to zero.

hours = 0.0;

wageRate = 0.0;

independents = 0;

}

public double getHours()

{

returnhours;

}

public double getWageRate()

{

returnwageRate;

}

public int independents()

{

returnindependents;

}

 

publicvoid prompt4data() // this is an instance method 

{

                         // This method should prompt for the input data

   Scanner console = new Scanner( System.in );

// Fill in the remaining code here by prompting for the

// three inputs and assigning the three instance fields.

   System.out.println( "Enter the number of hours worked: " );

   hours = console.nextDouble();

   System.out.println("Enter the wage rate:");

   wageRate = console.nextDouble();

   System.out.println("Enter the number of independents:");

   independents = console.nextInt();

}

/* Complete the grossPay instance method */

public double grossPay()

{

returnwageRate * hours;

// return the gross pay, not zero.

}

 

publicdouble fedTax()   // Write the fedTax() instance method here:  

{ 

return 0.;

}

public String toString()//Write the toString() instance method here: 

{

String worker ="The hour worked is: "+ hours +" n ";

worker = "The hourly rate is: "+ wageRate+" n";

worker = "The number of independents is: "+ independents+" n";

worker = "The gross income is: "+ +""

returnworker;

}

// end class

}