Employee
<< Car Talk Lab | LabTrailIndex | Nifty Uno >>
Here is the tab separated file of employees at Car Talk Plaza:
Here is the Empolyee Class:
Employee.java
/**
* class Employee holds Infomation about an Employee at Car Talk Plaza.
*
*/
public class Employee
{
private String job;
private String fullName;
private String lastName;
private String phone;
private String SSN;
/**
* Constructor for objects of class Employee
*/
public Employee(String j, String n)
{
job=j;
fullName=n;
lastName=n.substring(n.lastIndexOf(" ")+1);
phone="("+rand(3)+") "+rand(3)+"-"+rand(4);
SSN=rand(3)+"-"+rand(2)+"-"+rand(4);
}
public Employee(String[] s)
{
job=s[0];
fullName=s[1];
lastName=s[2];
phone=s[3];
SSN=s[4];
}
public String getName (){
return fullName;
}
public String getLastName (){
return lastName;
}
public String getPhone (){
return phone;
}
public String getSSN (){
return SSN;
}
public String getJob (){
return job;
}
public int rand(int digits){
int result = (int)(10*Math.random());
int d=1;
while (d<digits){
result=10*result + (int)(10*Math.random());
d++;
}
return result;
}
}
Here is the application class...make sure the datafile is in the same directory as the projects class files:
StaffDirectory.java
import java.io.*;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.Frame;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
/**
* Class StaffDirectory - for browsing and searching Car Talk Employees
* employee Information
* original Applet version 4 Feb 2009
*
* @author Chris Thiel, OFMCap
* @version 9 Feb 2023
*/
public class StaffDirectory extends Frame implements ActionListener
{
// instance variables - replace the example below with your own
private int x;
TextArea textArea;
ArrayList<Employee> list;
Button sortName;
Button sortJob;
Button searchName;
Button searchJob;
TextField searchFor;
String message;
public StaffDirectory()
{
super("Car Talk Staff Directory");
setSize(1000,800);
this.addWindowListener(new WindowListener() {
public void windowClosing(WindowEvent e) {System.exit(0);}
public void windowClosed(WindowEvent e) {}
public void windowOpened(WindowEvent e) {}
public void windowIconified(WindowEvent e) {}
public void windowDeiconified(WindowEvent e) {}
public void windowActivated(WindowEvent e) {}
public void windowDeactivated(WindowEvent e) {}
});
list=new ArrayList<Employee>();
textArea=new TextArea("Added the following:",25,70);
textArea.setEditable(false);
setLayout(new FlowLayout());
sortName = new Button("Sort by Name");
sortName.addActionListener(this);
sortJob = new Button("Sort by Job");
sortJob.addActionListener(this);
add(sortName);
add(sortJob);
setSize(650,800);
add(textArea);
add(new Label("Search for: "));
searchFor = new TextField(30);
add(searchFor);
searchName = new Button("Search Names");
searchName.addActionListener(this);
searchJob = new Button("Search Job");
searchJob.addActionListener(this);
add(searchName);
add(searchJob);
File dataFile = new File("CarTalkStaff.txt");
if (dataFile.exists())
{
message="Car Talk Staff";
try{
FileReader inFile = new FileReader(dataFile);
BufferedReader inStream = new BufferedReader(inFile);
String newLine;
newLine = inStream.readLine();
int i=0;
while (newLine!=null){
i++;
String[] s= newLine.split("\t");
Employee e=new Employee(s);
list.add(e);
textArea.append("\n"+i+". "+e.getJob()+" -- "+e.getFullName());
newLine = inStream.readLine();
}
inStream.close();
textArea.select(0,0);
} catch (IOException e){
message="File \"CarTalkStaff.tab\" not Found";
}
}
}
public static void main(String[] args)
{
StaffDirectory app= new StaffDirectory();
app.setVisible(true);
}
/**
* Paint method for (applet-->application).
*
* @param g the Graphics object for this applet
*/
public void paint(Graphics g)
{
// simple text displayed on applet
g.setColor(Color.white);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(Color.black);
g.drawString(message, 20, 20);
g.setColor(Color.blue);
g.drawString("Car Talk Plaza", 500, 20);
}
/**
* showRecord will return a String describing the
* the desired Employee from the list.
*/
public String showRecord(int i){
String result="Record not found";
if (i>=0 && i<list.size() ){
Employee e=list.get(i);
result=e.getJob()+"\n";
result+=e.getName()+"\n";
result+="SSN: "+e.getSSN()+"\n";
result+="Telephone: "+e.getPhone()+"\n";
}
return result;
}
/**
* Here is the implementaqtion of the ActionPerformed interface
*
* This interface requred us to define a specific method called
* actionPerformed, which will handle any ActionEvent which
* is generated when our user pressed a button.
*/
public void actionPerformed (ActionEvent ev){
Object source = ev.getSource();
if (source == sortName){
list=mergeSort(list, "lastName");
message="Sorting by last name";
textArea.setText("Names and Jobs");
for (Employee e:list) textArea.append( "\n"+e.getName()+" -- "+e.getJob() );
}
if (source == sortJob){
message="Sorting by job";
list=mergeSort(list, "job");
textArea.setText("Jobs and Names");
for (Employee e:list) textArea.append( "\n"+e.getJob()+" -- "+e.getName());
}
if (source == searchName){
String userInput = searchFor.getText();
message="Searching Names for "+userInput;
textArea.setText(message);
list=mergeSort(list, "lastName");
int record =findLastName(userInput,list);
textArea.setText(showRecord(record));
}
if (source == searchJob){
String userInput = searchFor.getText();
message="Searching Jobs for "+userInput;
int record =findJob(userInput,list);
textArea.setText(showRecord(record));
}
repaint();
}
public static ArrayList<Employee> mergeSort(ArrayList<Employee> a, String field)
{
if (a.size()<=1) return a;
int middle=a.size()/2;
ArrayList<Employee> left=new ArrayList<Employee>();
ArrayList<Employee> right=new ArrayList<Employee>();
for (int i=0;i<middle; i++)
{
left.add(a.get(i));
}
for (int i=middle;i<a.size();i++)
{
right.add(a.get(i));
}
left =mergeSort(left, field);
right=mergeSort(right, field);
ArrayList<Employee> result=merge(left,right, field);
return result;
}
private static ArrayList<Employee> merge(ArrayList<Employee> left, ArrayList<Employee> right, String field)
{
ArrayList<Employee> result=new ArrayList<Employee>();
while (left.size()>0 && right.size()>0)
{
String theLeft="",theRight="";
if (field.equals("lastName")) {
theLeft=(left.get(0)).getLastName();
theRight=(right.get(0)).getLastName();
}
if (field.equals("job")) {
theLeft=(left.get(0)).getJob();
theRight=(right.get(0)).getJob();
}
if (theLeft.compareTo(theRight)<0){
result.add(left.get(0));
left.remove(0);
}else {
result.add(right.get(0));
right.remove(0);
}
}
//Since left or right ran out, we attach the remainder to the result
while (left.size()>0)
{
result.add(left.get(0));
left.remove(0);
}
while (right.size()>0)
{
result.add(right.get(0));
right.remove(0);
}
return result;
}
/**
* When the search by Name button is pressed it calls this method
* it should search the list of Employees for last,
* returning the index of the first record it finds with
* the search string last, or a -1 if it was not found
**/
public int findLastName(String last, ArrayList<Employee> list)
{
//Your code here
return -1;
}
/**
* When the search by Job button is pressed it calls this method
* it should search the list of Employees for the job,
* returning the index of the first record it finds with
* the search string job, or a -1 if it was not found
**/
public int findJob(String job, ArrayList<Employee> list)
{
//Your code here
return -1;
}
}
Here is the old deprecated applet... make sure the data file is in the same directory as the class files:
StaffDirectory.java
import java.io.*;
import java.text.DecimalFormat;
import java.util.ArrayList;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
/**
* Class StaffDirectory - Applet for browsing and searching
* employee Information
*
* @author Chris Thiel, OFMCap
* @version 4 Feb 2009
*/
public class StaffDirectory extends JApplet implements ActionListener
{
// instance variables - replace the example below with your own
private int x;
TextArea textArea;
ArrayList<Employee> list;
Button sortName;
Button sortJob;
Button searchName;
Button searchJob;
TextField searchFor;
String message;
public void init()
{
list=new ArrayList<Employee>();
textArea=new TextArea("Added the following:",25,70);
textArea.setEditable(false);
setLayout(new FlowLayout());
sortName = new Button("Sort by Name");
sortName.addActionListener(this);
sortJob = new Button("Sort by Job");
sortJob.addActionListener(this);
add(sortName);
add(sortJob);
setSize(700,500);
add(textArea);
searchFor = new TextField(30);
add(searchFor);
searchName = new Button("Search Names");
searchName.addActionListener(this);
searchJob = new Button("Search Job");
searchJob.addActionListener(this);
add(searchName);
add(searchJob);
File dataFile = new File("CarTalkStaff.txt");
if (dataFile.exists())
{
message="Car Talk Staff";
try{
FileReader inFile = new FileReader(dataFile);
BufferedReader inStream = new BufferedReader(inFile);
String newLine;
newLine = inStream.readLine();
int i=0;
while (newLine!=null){
i++;
String[] s= newLine.split("\t");
Employee e=new Employee(s);
list.add(e);
textArea.append("\n"+i+". "+e.getJob()+" -- "+e.getName());
newLine = inStream.readLine();
}
inStream.close();
textArea.select(0,0);
} catch (IOException e){
message="File \"CarTalkStaff.tab\" not Found";
}
}
}
/**
* Paint method for applet.
*
* @param g the Graphics object for this applet
*/
public void paint(Graphics g)
{
// simple text displayed on applet
g.setColor(Color.white);
g.fillRect(0, 0, getWidth(), getHeight());
g.setColor(Color.black);
g.drawString(message, 20, 20);
g.setColor(Color.blue);
g.drawString("Car Talk Plaza", 500, 20);
}
/**
* showRecord will return a String describing the
* the desired Employee from the list.
*/
public String showRecord(int i){
String result="Record not found";
if (i>=0 && i<list.size() ){
Employee e=list.get(i);
result=e.getJob()+"\n";
result+=e.getName()+"\n";
result+="SSN: "+e.getSSN()+"\n";
result+="Telephone: "+e.getPhone()+"\n";
}
return result;
}
/**
* Here is the implementaqtion of the ActionPerformed interface
*
* This interface requred us to define a specific method called
* actionPerformed, which will handle any ActionEvent which
* is generated when our user pressed a button.
*/
public void actionPerformed (ActionEvent ev){
Object source = ev.getSource();
if (source == sortName){
list=mergeSort(list, "lastName");
message="Sorting by last name";
textArea.setText("Names and Jobs");
for (Employee e:list) textArea.append( "\n"+e.getName()+" -- "+e.getJob() );
}
if (source == sortJob){
message="Sorting by job";
list=mergeSort(list, "job");
textArea.setText("Jobs and Names");
for (Employee e:list) textArea.append( "\n"+e.getJob()+" -- "+e.getName());
}
if (source == searchName){
String userInput = searchFor.getText();
message="Searching Names for "+userInput;
textArea.setText(message);
list=mergeSort(list, "lastName");
int record =findLastName(userInput,list);
textArea.setText(showRecord(record));
}
if (source == searchJob){
String userInput = searchFor.getText();
message="Searching Jobs for "+userInput;
int record =findJob(userInput,list);
textArea.setText(showRecord(record));
}
repaint();
}
public static ArrayList<Employee> mergeSort(ArrayList<Employee> a, String field)
{
if (a.size()<=1) return a;
int middle=a.size()/2;
ArrayList<Employee> left=new ArrayList<Employee>();
ArrayList<Employee> right=new ArrayList<Employee>();
for (int i=0;i<middle; i++)
{
left.add(a.get(i));
}
for (int i=middle;i<a.size();i++)
{
right.add(a.get(i));
}
left =mergeSort(left, field);
right=mergeSort(right, field);
ArrayList<Employee> result=merge(left,right, field);
return result;
}
private static ArrayList<Employee> merge(ArrayList<Employee> left, ArrayList<Employee> right, String field)
{
ArrayList<Employee> result=new ArrayList<Employee>();
while (left.size()>0 && right.size()>0)
{
String theLeft="",theRight="";
if (field.equals("lastName")) {
theLeft=(left.get(0)).getLastName();
theRight=(right.get(0)).getLastName();
}
if (field.equals("job")) {
theLeft=(left.get(0)).getJob();
theRight=(right.get(0)).getJob();
}
if (theLeft.compareTo(theRight)<0){
result.add(left.get(0));
left.remove(0);
}else {
result.add(right.get(0));
right.remove(0);
}
}
//Since left or right ran out, we attach the remainder to the result
while (left.size()>0)
{
result.add(left.get(0));
left.remove(0);
}
while (right.size()>0)
{
result.add(right.get(0));
right.remove(0);
}
return result;
}
/**
* When the search by Name button is pressed it calls this method
* it should search the list of Employees for last,
* returning the index of the first record it finds with
* the search string last, or a -1 if it was not found
**/
public int findLastName(String last, ArrayList<Employee> list)
{
//Your code here
return -1;
}
/**
* When the search by Job button is pressed it calls this method
* it should search the list of Employees for the job,
* returning the index of the first record it finds with
* the search string job, or a -1 if it was not found
**/
public int findJob(String job, ArrayList<Employee> list)
{
//Your code here
return -1;
}
}
What to do
- Try to get it running. As it is, it only sorts the information, the search is not yet working.
- Complete the search by name (and or search by job) using a linear search
- Complete the search by name (and or search by job) using a binary search (don't forget to sort first!)
- If you notice the search will only return the first record--try to fill the textArea will all the records that match the search criteria