Calculating Login and Logout Times - need help

Question

Hi everyone. I have the first part of this code and can't seem to figure out the time calculation part. What it is - create a code that asks for a user name or social security number, then the person enters up to 6 login and logout times for the day. They also have the option to enter personal time or sick time (neither of which can be over 8 hours). I have all of that complete, but I can't figure out how to get the in and out times and the leave times to calculate. I have 3 pieces of code - here they are:
Hours:
import java.util.*;
public class Hours
     //define states of Hours
     int regularhoursInt = 0;
     int regularminutesInt = 0;
     int overtimehoursInt = 0;
     int overtimeminutesInt = 0;          
     //set hours worked
     public void setHours(int timein, int timeout)
          int temphoursin = timein/100;
          int tempminutesin = timein - timein/100;
          int temphoursout = timeout/100;
          int tempminutesout = timeout - timeout/100;
          GregorianCalendar time1 = new GregorianCalendar(2003, 8, 1, temphoursin, tempminutesin, 0);
          GregorianCalendar time2 = new GregorianCalendar(2003, 8, 1, temphoursout, tempminutesout, 0);
          //store to date
          Date d1 = time1.getTime();
          Date d2 = time2.getTime();
          //store time to long
          long t1 = d1.getTime();
          long t2 = d2.getTime();
          //subtract and convert to seconds
          long time = (t2 - t1)/1000;
          long tempregularLong = 0;
          long tempovertimeLong = 0;
          //see if regular hours are over 8 hours (28800 seconds)
          tempregularLong = time;
          if (tempregularLong > 28800)
               tempovertimeLong = tempregularLong - 28800;
               tempregularLong = tempregularLong - tempovertimeLong;
          //convert to hours and minutes
          regularhoursInt = regularhoursInt + (Integer.parseInt(Long.toString(tempregularLong)) / 3600);
          regularminutesInt = regularminutesInt + (Integer.parseInt(Long.toString(tempregularLong)) / (3600 * regularhoursInt));
          overtimehoursInt = overtimehoursInt + (Integer.parseInt(Long.toString(tempovertimeLong)) / 3600);
          overtimeminutesInt = overtimeminutesInt + (Integer.parseInt(Long.toString(tempovertimeLong)) / (3600 * regularhoursInt));     }
     // get regular hours worked
     public int getRegularHours()
          return regularhoursInt;
     // get regular minutes worked
     public int getRegularMinutes()
          return regularminutesInt;
     //get overtime hours worked
     public int getOvertimeHours()
          return overtimehoursInt;
     // get overtime minutes worked
     public int getOvertimeMinutes()
          return overtimeminutesInt;
Employee:
public class Employee
     //define states of employee
     String nameString = "";
     String ssnString = "";
     double payrateDouble = 0;
     double hoursworkedDouble = 0;
     double overtimehoursDouble = 0;
     double sickleaveDouble = 0;
     double personalleaveDouble = 0;
     double totalpayDouble = 0;
     //set and get employee name
     public void setName(String name)
          nameString = name;
     public String getName()
          return nameString;
     //set and get employee ssn
     public void setSsn(String ssn)
          ssnString = ssn;
     public String getSsn()
          return ssnString;
     //set and get employee payrate
     public void setPayRate(double payrate)
          payrateDouble = payrate;
     public double getPayRate()
          return payrateDouble;
     //set and get employee hours worked
     public void setHoursWorked(double hoursworked)
          hoursworkedDouble = hoursworked;
     public double getHoursWorked()
          return hoursworkedDouble;
     //set and get employee overtimehours
     public void setOverTime(double overtime)
          overtimehoursDouble = overtime;
     public double getOverTime()
          return overtimehoursDouble;
     //set and get employee sick leave hours
     public void setSickLeave(double sickleave)
          sickleaveDouble = sickleave;
     public double getSickLeave()
          return sickleaveDouble;
     //set and get employee sick leave hours
     public void setPersonalLeave(double personalleave)
          personalleaveDouble = personalleave;
     public double getPersonalLeave()
          return personalleaveDouble;
     //get employees total pay
     public double getTotalPay()
          //calculate regular pay
          totalpayDouble = payrateDouble * hoursworkedDouble;
          //add in any over time pay
          totalpayDouble = totalpayDouble + payrateDouble * 1.5 * overtimehoursDouble;
          //add in any sick time pay
          totalpayDouble = totalpayDouble + payrateDouble * sickleaveDouble;
          //add in any personal leave time pay
          totalpayDouble = totalpayDouble + payrateDouble * personalleaveDouble;
          return totalpayDouble;
Entry Screen:
import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
import javax.swing.*;
import java.util.*;
import java.text.*;
//create entryscreen class as a java applet
public class EntryScreen extends Applet implements ActionListener
     //declare all variables, labels, textfields, and buttons
//store pay rate to variable payrateDouble
     double payrateDouble = 10.00;
     //store ssn and names to ssnString
     String[][] ssnString ={{"123121234", "234232345", "345343456", "456454567",
          "567565678", "678676789"},{"Jane Doe", "John Doe", "Sam Smith", "Tom Thumb", "Sara Jane", "Cindy Thompson"}};
     //set date format to MM/dd/yy and store in variable formatter
     SimpleDateFormat formatter = new SimpleDateFormat("MM/dd/yy");
     //store current date to variable date
     Date date = new Date();
     //using variable formatter store current date to dateString
     String dateString = formatter.format(date);
     //declare all label, Textfields and buttons use in the applet
     JLabel titleLabel;
JLabel dateLabel;
JTextField dateTextField;
JLabel ssnLabel;
JTextField ssnTextField;
JLabel timeLabel;
JLabel inLabel;
JLabel outLabel;
JTextField in1TextField;
JTextField in2TextField;
JTextField in3TextField;
     JTextField in4TextField;
     JTextField in5TextField;
JTextField in6TextField;
JTextField out1TextField;
JTextField out2TextField;
JTextField out3TextField;
JTextField out4TextField;
JTextField out5TextField;
JTextField out6TextField;
JLabel sickLabel;
JTextField sickTextField;
JTextField personalTextField;
JLabel personalLabel;
JButton okButton;
JButton clearButton;
JLabel day1Label;
JLabel day2Label;
JLabel day3Label;
JLabel day4Label;
JLabel day5Label;
JLabel day6Label;
     //initialize the applet screen
public void init()
          //create a custom layout object based on the EntryScreenLayout class
          EntryScreenLayout customLayout = new EntryScreenLayout();
          //set the font for the screen
setFont(new Font("Helvetica", Font.PLAIN, 12));
setLayout(customLayout);
     //populate the applet with the labels, textfields, and buttons
          titleLabel = new JLabel("Employee Payroll System");
add(titleLabel);
dateLabel = new JLabel("Date (MM/DD/YY):");
add(dateLabel);
dateTextField = new JTextField("");
add(dateTextField);
          //set text in field to current date
          dateTextField.setText(dateString);
ssnLabel = new JLabel("SSN (Numbers Only):");
add(ssnLabel);
ssnTextField = new JTextField("");
add(ssnTextField);
timeLabel = new JLabel("Hours Worked (hhmm)");
add(timeLabel);
inLabel = new JLabel("In:");
add(inLabel);
outLabel = new JLabel("Out");
add(outLabel);
in1TextField = new JTextField("");
add(in1TextField);
in2TextField = new JTextField("");
add(in2TextField);
in3TextField = new JTextField("");
add(in3TextField);
in4TextField = new JTextField("");
add(in4TextField);
in5TextField = new JTextField("");
add(in5TextField);
in6TextField = new JTextField("");
add(in6TextField);
out1TextField = new JTextField("");
add(out1TextField);
out2TextField = new JTextField("");
add(out2TextField);
out3TextField = new JTextField("");
add(out3TextField);
out4TextField = new JTextField("");
add(out4TextField);
out5TextField = new JTextField("");
add(out5TextField);
out6TextField = new JTextField("");
add(out6TextField);
sickLabel = new JLabel("Sick Leave Used:");
add(sickLabel);
sickTextField = new JTextField("");
add(sickTextField);
personalTextField = new JTextField("");
add(personalTextField);
personalLabel = new JLabel("Personal Leave Used:");
add(personalLabel);
     okButton = new JButton("Ok");
     add(okButton);
          okButton.addActionListener(this);
     clearButton = new JButton("Clear");
     add(clearButton);
          clearButton.addActionListener(this);
     day1Label = new JLabel("Day 1:");
     add(day1Label);
     day2Label = new JLabel("Day 2:");
     add(day2Label);
day3Label = new JLabel("Day 3:");
add(day3Label);
day4Label = new JLabel("Day 4:");
add(day4Label);
day5Label = new JLabel("Day 5:");
add(day5Label);
day6Label = new JLabel("Day 6:");
          add(day6Label);
          //set the size of the applet window as listed in the EntryScreenLayout class
          setSize(getPreferredSize());
     public void actionPerformed(ActionEvent e)
          //get the source object
          Object source = e.getSource();
          //perform if OK button was presses      
          if(source == okButton)
               int[][] inouttimes = new int[1][5];
               boolean matchBoolean = false;
               boolean timeError = false;
               int locationInt = 0;
               double[] leavehours = new double[1];
               String messageString = "";
               //get the text from the ssnTextField and store to inputString
               String inputString = ssnTextField.getText();
               //check to see if inputString matches ssnString array
               for(int i = 0; i < 6; ++i)
                    //if a match assign variables
                    if (inputString.equals(ssnString[0]))
                         matchBoolean = true;
                         locationInt = i;
                         break;
                    //if not a match
                    else
                         matchBoolean = false;
               }//end for i
               //if a SSN match is true than display the name, SSN, total hours, overtime hours, and total pay for hours worked.
               if (matchBoolean == true)
                    //get the check in/out times, if blank assign a zero
                    Employee temp = new Employee();
                    temp.setName(ssnString[1][locationInt]);
                    temp.setSsn(ssnString[0][locationInt]);
                    temp.setPayRate(payrateDouble);
                    temp.setSickLeave(Double.parseDouble(sickTextField.getText()));
                    temp.setPersonalLeave(Double.parseDouble(personalTextField.getText()));
                    /*inouttimes[0][0] = Integer.parseInt(in1TextField.getText());
                    inouttimes[1][0] = Integer.parseInt(out1TextField.getText();
                    inouttimes[0][1] = Integer.parseInt(in2TextField.getText();
                    inouttimes[1][1] = Integer.parseInt(out2TextField.getText();
                    inouttimes[0][2] = Integer.parseInt(in3TextField.getText();
                    inouttimes[1][2] = Integer.parseInt(out3TextField.getText();
                    inouttimes[0][3] = Integer.parseInt(in4TextField.getText();
                    inouttimes[1][3] = out4TextField.getText();
                    inouttimes[0][4] = in5TextField.getText();
                    inouttimes[1][4] = out5TextField.getText();
                    inouttimes[0][5] = in6TextField.getText();
                    inouttimes[1][5] = out6TextField.getText();
                    for (int x = 0; x < 2; ++x)
                         for (int y = 0; y < 2; ++y)
                              String temp = String.valueOf(inouttimes[x][y]);
                              if (temp.equals(""))
                                   inouttimes[x][y] = 0;
                              if (inouttimes[x][y] < 0 && inouttimes[x][y] > 2400)
                                   timeError = true;          
                                   break;
                         if (timeError = true)
                              break;
                    messageString = temp.getName() + "\n" + temp.getSsn() + "\n" + temp.getTotalPay();
               JOptionPane.showMessageDialog(null, messageString);
               }//if (matchBoolean == true)
               //if SSN match is false then display error message
               else
                    JOptionPane.showMessageDialog(null, "There is no listing under that Social Security Number.\n" +
                         "Please verify and re-enter.");                    
          }//end if(source == okButton)
          //perform if the Clear button was pressed
          if(source == clearButton)
               //clear all the textfields
               dateTextField.setText("");
               ssnTextField.setText("");
               in1TextField.setText("");
               out1TextField.setText("");
               in2TextField.setText("");
               out2TextField.setText("");
               in3TextField.setText("");
               out3TextField.setText("");
               in4TextField.setText("");
               out4TextField.setText("");
               in5TextField.setText("");
               out5TextField.setText("");
               in6TextField.setText("");
               out6TextField.setText("");
               sickTextField.setText("");
               personalTextField.setText("");
               //set text in field to current date
               dateTextField.setText(dateString);
     public static void main(String args[])
          //create new entryscreen object called applet
          EntryScreen applet = new EntryScreen();
     //create new frame for applet called window
          Frame window = new Frame("EntryScreen");
     window.addWindowListener(new WindowAdapter()
               public void windowClosing(WindowEvent e)
               //close the applet           
                    System.exit(0);
          //initiate the applet
          applet.init();
window.add("Center", applet);
window.pack();
window.setVisible(true);
//create entryscreenlayout custom class to position controls on applet screen
class EntryScreenLayout implements LayoutManager {
public EntryScreenLayout() {
public void addLayoutComponent(String name, Component comp) {
public void removeLayoutComponent(Component comp) {
public Dimension preferredLayoutSize(Container parent) {
Dimension dim = new Dimension(0, 0);
Insets insets = parent.getInsets();
dim.width = 360 + insets.left + insets.right;
dim.height = 487 + insets.top + insets.bottom;
return dim;
public Dimension minimumLayoutSize(Container parent) {
Dimension dim = new Dimension(0, 0);
return dim;
public void layoutContainer(Container parent) {
Insets insets = parent.getInsets();
Component c;
c = parent.getComponent(0);
if (c.isVisible()) {c.setBounds(insets.left+88,insets.top+8,192,24);}
c = parent.getComponent(1);
if (c.isVisible()) {c.setBounds(insets.left+24,insets.top+48,152,24);}
c = parent.getComponent(2);
if (c.isVisible()) {c.setBounds(insets.left+184,insets.top+48,152,24);}
c = parent.getComponent(3);
if (c.isVisible()) {c.setBounds(insets.left+24,insets.top+80,152,24);}
c = parent.getComponent(4);
if (c.isVisible()) {c.setBounds(insets.left+184,insets.top+80,152,24);}
c = parent.getComponent(5);
if (c.isVisible()) {c.setBounds(insets.left+104,insets.top+112,152,24);}
c = parent.getComponent(6);
if (c.isVisible()) {c.setBounds(insets.left+104,insets.top+144,72,24);}
c = parent.getComponent(7);
if (c.isVisible()) {c.setBounds(insets.left+184,insets.top+144,72,24);}
c = parent.getComponent(8);
if (c.isVisible()) {c.setBounds(insets.left+104,insets.top+176,72,24);}
c = parent.getComponent(9);
if (c.isVisible()) {c.setBounds(insets.left+104,insets.top+208,72,24);}
c = parent.getComponent(10);
if (c.isVisible()) {c.setBounds(insets.left+104,insets.top+240,72,24);}
c = parent.getComponent(11);
if (c.isVisible()) {c.setBounds(insets.left+104,insets.top+272,72,24);}
c = parent.getComponent(12);
if (c.isVisible()) {c.setBounds(insets.left+104,insets.top+304,72,24);}
c = parent.getComponent(13);
if (c.isVisible()) {c.setBounds(insets.left+104,insets.top+336,72,24);}
c = parent.getComponent(14);
if (c.isVisible()) {c.setBounds(insets.left+184,insets.top+176,72,24);}
c = parent.getComponent(15);
if (c.isVisible()) {c.setBounds(insets.left+184,insets.top+208,72,24);}
c = parent.getComponent(16);
if (c.isVisible()) {c.setBounds(insets.left+184,insets.top+240,72,24);}
c = parent.getComponent(17);
if (c.isVisible()) {c.setBounds(insets.left+184,insets.top+272,72,24);}
c = parent.getComponent(18);
if (c.isVisible()) {c.setBounds(insets.left+184,insets.top+304,72,24);}
c = parent.getComponent(19);
if (c.isVisible()) {c.setBounds(insets.left+184,insets.top+336,72,24);}
c = parent.getComponent(20);
if (c.isVisible()) {c.setBounds(insets.left+24,insets.top+368,152,24);}
c = parent.getComponent(21);
if (c.isVisible()) {c.setBounds(insets.left+184,insets.top+368,72,24);}
c = parent.getComponent(22);
if (c.isVisible()) {c.setBounds(insets.left+184,insets.top+400,72,24);}
c = parent.getComponent(23);
if (c.isVisible()) {c.setBounds(insets.left+24,insets.top+400,152,24);}
c = parent.getComponent(24);
if (c.isVisible()) {c.setBounds(insets.left+104,insets.top+440,72,24);}
c = parent.getComponent(25);
if (c.isVisible()) {c.setBounds(insets.left+184,insets.top+440,72,24);}
c = parent.getComponent(26);
if (c.isVisible()) {c.setBounds(insets.left+24,insets.top+176,72,24);}
c = parent.getComponent(27);
if (c.isVisible()) {c.setBounds(insets.left+24,insets.top+208,72,24);}
c = parent.getComponent(28);
if (c.isVisible()) {c.setBounds(insets.left+24,insets.top+240,72,24);}
c = parent.getComponent(29);
if (c.isVisible()) {c.setBounds(insets.left+24,insets.top+272,72,24);}
c = parent.getComponent(30);
if (c.isVisible()) {c.setBounds(insets.left+24,insets.top+304,72,24);}
c = parent.getComponent(31);
if (c.isVisible()) {c.setBounds(insets.left+24,insets.top+336,72,24);}
I know it is a lot of code, but I am just starting and couldn't think of an easier way to do this.
Thank you for any help - it is greatly appreciated. You can email me with any code help - [email protected].
Steph

Answer 1

My 2 cents, I dunno what it'll be worth.
I think you should never convert anything until the final moment that you are at actually getting the int or float number of hours.
Why are you doing all this Gregorian and conversion gymnastics throughout your calculations?
To get the current time in milliseconds, use either
java.util.Date d = new java.util.Date();
or
long d = System.currentTimeMillis();
Use this long number for all your calculations, and only at the end convert it. To convert, you can use java.text.SimpleDateFormat, which I find very straightforward to use. I honestly think you should never convert your dates before doing any calculations, only after doing them, otherwise you'll loose precision and make errors for sure.