Java GUI Payroll Program

The program below is the solution to Liang’s Introduction to Java Programming (9th Edition) Chapter 2 Exercise 2.27.

Question: Rewrite Exercise 2.25 using GUI input and output dialog boxes.


/**<br /> *<br /> * @Author: Aghatise Osazuwa<br /> * Website: www.cscprogrammingtutorials.com<br /> *<br /> * Exercise 2.27 - Financial application: payroll<br /> *<br /> */ <br /><br />import javax.swing.JOptionPane;<br /><br />public class Ex02_27 {<br /><br />    public static void main(String[] args) {<br />        <br />        //collect employee data using GUI input dialog box<br />        String name = JOptionPane.showInputDialog(null, "Enter employee's name: ",<br />                "Input", JOptionPane.QUESTION_MESSAGE);<br />        String sHours = JOptionPane.showInputDialog(null,<br />                "Enter number of hours worked in a week: ", "Input",<br />                JOptionPane.QUESTION_MESSAGE);<br />        int hours = Integer.parseInt(sHours);<br />        String sRate = JOptionPane.showInputDialog(null, "Enter hourly pay rate: ",<br />                "Input", JOptionPane.QUESTION_MESSAGE);<br />        double rate = Double.parseDouble(sRate);<br />        String sFedRate = JOptionPane.showInputDialog(null,<br />                "Enter federal tax withholding rate e.g 20 for 20%: ", "Input",<br />                JOptionPane.QUESTION_MESSAGE);<br />        int fedRate = Integer.parseInt(sFedRate);<br />        String sStateRate = JOptionPane.showInputDialog(null,<br />                "Enter state tax withholding rate e.g 10 for 10%: ", "Input",<br />                JOptionPane.QUESTION_MESSAGE);<br />        int stateRate = Integer.parseInt(sStateRate);<br /><br />        //calculate employee gross pay and net pay<br />        double grossPay = hours * rate;<br />        double fedWithHolding = ((fedRate / 100.0) * grossPay);<br />        double stateWithHolding = ((stateRate / 100.0) * grossPay);<br />        double totalDeduction = fedWithHolding + stateWithHolding;<br />        double netPay = grossPay - totalDeduction;<br /><br />        //format netPay to two decimal places<br />        netPay = (int) (netPay * 100) / 100.0;<br /><br />        //print payroll using GUI output dialog box<br />        String output = ("nnEmployee Name: " + name + "nHours Worked: " + hours<br />                + "nPay Rate: $" + rate + "nGross Pay: $" + grossPay + "nDeductions: "<br />                + "n  Federal Withholding (" + (double) fedRate + "%): $" + fedWithHolding<br />                + "n  State Withholding (" + (double) stateRate + "%): $" + stateWithHolding<br />                + "n  Total Deduction: $" + totalDeduction + "nNet Pay: $" + netPay);<br /><br />        JOptionPane.showMessageDialog(null, output, "Employee Payroll Info", 1);<br />    }<br />}<br />

/** * * @Author: Aghatise Osazuwa * Website: www.cscprogrammingtutorials.com * * Exercise 2.27 - Financial application: payroll * */ import javax.swing.JOptionPane; public class Ex02_27 { public static void main(String[] args) { //collect employee data using GUI input dialog box String name = JOptionPane.showInputDialog(null, "Enter employee's name: ", "Input", JOptionPane.QUESTION_MESSAGE); String sHours = JOptionPane.showInputDialog(null, "Enter number of hours worked in a week: ", "Input", JOptionPane.QUESTION_MESSAGE); int hours = Integer.parseInt(sHours); String sRate = JOptionPane.showInputDialog(null, "Enter hourly pay rate: ", "Input", JOptionPane.QUESTION_MESSAGE); double rate = Double.parseDouble(sRate); String sFedRate = JOptionPane.showInputDialog(null, "Enter federal tax withholding rate e.g 20 for 20%: ", "Input", JOptionPane.QUESTION_MESSAGE); int fedRate = Integer.parseInt(sFedRate); String sStateRate = JOptionPane.showInputDialog(null, "Enter state tax withholding rate e.g 10 for 10%: ", "Input", JOptionPane.QUESTION_MESSAGE); int stateRate = Integer.parseInt(sStateRate); //calculate employee gross pay and net pay double grossPay = hours * rate; double fedWithHolding = ((fedRate / 100.0) * grossPay); double stateWithHolding = ((stateRate / 100.0) * grossPay); double totalDeduction = fedWithHolding + stateWithHolding; double netPay = grossPay - totalDeduction; //format netPay to two decimal places netPay = (int) (netPay * 100) / 100.0; //print payroll using GUI output dialog box String output = ("nnEmployee Name: " + name + "nHours Worked: " + hours + "nPay Rate: $" + rate + "nGross Pay: $" + grossPay + "nDeductions: " + "n Federal Withholding (" + (double) fedRate + "%): $" + fedWithHolding + "n State Withholding (" + (double) stateRate + "%): $" + stateWithHolding + "n Total Deduction: $" + totalDeduction + "nNet Pay: $" + netPay); JOptionPane.showMessageDialog(null, output, "Employee Payroll Info", 1); } }