I am in need of a basic Java program using GUI. Here is the prompt: Purpose: Bui

Question

I am in need of a basic Java program using GUI. Here is the prompt:

Purpose:

Build an application to calculate an Employee’s Gross Pay use Java OO GUI Design.

Problem:

Build a GUI application that would allow the user to calculate an Employee’s Gross Pay. The user will enter the employee’s id number, pay-period end-date and hours worked. The program will read the input file to obtain the employee name and hourly pay rate. The program then calculates and displays the Employee’s Full Name and Gross Pay for the pay period

(see both inputs and outputs listed in the table below).

Assumptions:

Gross Pay = (Regular hours* pay rate) + (Over Time hours * pay rate *1.5)

Regular hours are less than or equal to 40

Language: JAVA (Object - oriented and UI)

Data Requirements Input User Input Fields Data-Tvpe Employee # Pay-Period End-Date Hours Worked Strin String (or Date Double 15 03/13/17 41.5 Employee File Employee.txt Employee # Last Name First Name Pay Rate Strin String Strin Currency or Double 15 John Smith 25.75 Processes Enter Input Read Employee File Calculate Gross Pa Display Output Other Processes Clear Clear Input /Output control for the next Emplovee or To start over End the Screen / Application Close / Exit Output Employee's Full Name Regular Hours Over-Time Hours Regular Pa Over-Time Pa Employee's Gross Pa Advanced

Explanation / Answer

package testswing; import javax.swing.*; import javax.swing.table.DefaultTableModel; import javax.swing.table.JTableHeader; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; public class GrossPay extends JFrame implements ActionListener { private JFrame f; private JTextField idv=null,hoursv=null; private JLabel id=null,hours=null; private JButton button=null,clear=null; private JLabel error=null; JScrollPane pane=null; JTable table=null; DefaultTableModel model =null; public void actionPerformed(ActionEvent e){ } public GrossPay(){ f = new JFrame("Employee’s Gross Pay Calculator"); id=new JLabel("Employee ID: "); hours=new JLabel("Pay Hours"); id.setBounds(200,30,120,30); hours.setBounds(200,70,120,30); idv=new JTextField(""); hoursv=new JTextField(""); idv.setBounds(360,30,120,30); hoursv.setBounds(360,70,120,30); f.getContentPane().setLayout(null); f.setSize(800,600); f.setVisible(true); button = new JButton("Calculate Gross Pay"); button.setBounds(160,120,150,30); button.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { try{ File file=new File("Give the PATH of the File Here"); FileReader reader = new FileReader(file); BufferedReader bufferedReader = new BufferedReader(reader); boolean hit=false; while (true) { String line = bufferedReader.readLine(); if (line == null) break; String[] data=line.split(","); if(idv.getText()==null||idv.getText().equals("")) throw new Exception("Employee Id Shouldn't be Empty"); if(hoursv.getText()==null||hoursv.getText().equals("")) throw new Exception("Hours Worked Shouldn't be Empty"); if(idv.getText().equals(data[0])){ hit=true; String firstName=data[1]; String secondName=data[2]; Double payrate=Double.parseDouble(data[3]); Double hoursCount=Double.parseDouble(hoursv.getText()); Double oT=0.0; if(hoursCount>=40.0){ oT=hoursCount-40.0; hoursCount=hoursCount-oT; } Double regPay=hoursCount*payrate; Double oTpay=oT*1.5*payrate; Double grossPay=regPay+oTpay; String col[] = {"Employee Id","Employee Name","Regular Hours","OverTime Hours","Regular Pay","OT Pay","GrossPay"}; String[][] datas={{idv.getText(),firstName + " "+secondName,hoursCount+"",oT+"",regPay+"",oTpay+"",grossPay+""}}; if(model==null) { model = new DefaultTableModel(datas, col); } if(table==null){ table = new JTable(); table.setModel(model);} else{ model.setDataVector(datas,col); table.setModel(model); } table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); JTableHeader header = table.getTableHeader(); header.setBackground(Color.yellow); if(error!=null){ f.remove(error); } if(pane==null) pane = new JScrollPane(table); pane.setBounds(20,200,500,50); f.add(pane); f.getRootPane().setWindowDecorationStyle(JRootPane.PLAIN_DIALOG); f.repaint(); } } if(hit==false){ throw new Exception("Employee Id not Found"); } }catch (Exception ex){ if(error==null) error=new JLabel(); error.setText(ex.getMessage()); error.setBounds(60,250,400,30); f.add(error); f.repaint(); } } }); clear =new JButton("Clear"); clear.setBounds(320,120,150,30); clear.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { idv.setText("");hoursv.setText("");f.remove(pane); if(error!=null){ f.remove(error); } f.repaint(); } }); f.add(id);f.add(hours);f.add(idv);f.add(hoursv);f.add(button);f.add(clear); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } public static void main(String a[]){ GrossPay g=new GrossPay(); } }

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