flight.java

Java模拟航空公司订票系统

import java.io.*;
import java.util.*;
import java.util.Date;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
public class Flight
{
private Seat seats [];
private String flightNumber;
private String departure;
private String arrival;
private String date;
private boolean checkingIn = false;
private boolean boarding = false;
private boolean closed = false;
private boolean full = false;
private String statusMessage = "Seats available";;
private int freeSeats;
private int reservedSeats;
private int bookedSeats;
private int rows;
private int cols;
//---------- constructor -----------
public Flight (int rows, int cols)
{
seats = new Seat[rows*cols];
Date today = new Date();
int i = 0;
this.rows = rows;
this.cols = cols;
// instantiate an array of Seat objects
for (int row=1; row<=rows; row++)
for(int col=1; col<=cols; col++){
seats[i] = new Seat(row, col);
i++;
} // endfor
// endfor
freeSeats = rows*cols;
reservedSeats = 0;
bookedSeats = 0;
today = new Date();
SimpleDateFormat df1 = new SimpleDateFormat( "dd-MM-yy" );
date = df1.format(today);
}
//---------- methods -----------
public boolean isCheckingIn()
{
return checkingIn;
}
public boolean isBoarding()
{
return boarding;
}
public boolean isClosed()
{
return closed;
}

public boolean isFull()
{
return full;
}
public String getStatusMessage()
{
return statusMessage;
}
public void setFlightDetails(String fltNo, String dep, String arr)
{
flightNumber = fltNo;
departure = dep;
arrival = arr;
}
public String getDeparture()
{
return departure;
}
public String getArrival()
{
return arrival;
}
public void setFlightStatus(char statusCode)
{
switch (statusCode)
{
case '1' : checkingIn = true;
statusMessage = "Checking in";
break;
case '2' : boarding = true;
statusMessage = "Boarding";
break;
case '3' : closed = true;
statusMessage = "Flight closed";
break;
} // endswitch
}
public int getFreeSeats()
{
return freeSeats;
}
public int getReservedSeats()
{
return reservedSeats;
}
public int getBookedSeats()
{
return bookedSeats;
}
public String getDate()
{
return date;
}

public void viewSeat (String seatNo)
{
Seat temp;
temp = getSeat(seatNo);
if (temp != null)
temp.displaySeatInfo();
}
public void displayFlightInfo()
{
DecimalFormat df1 = new DecimalFormat("###0.00");
System.out.print("\n\t\tFlight: "+flightNumber);
System.out.print("\tDate: "+date);
System.out.print("\n\t\tDep: "+departure);
System.out.println(" Arr: "+arrival);
System.out.println("\t\tFlight Status: "+statusMessage);
System.out.println("\t\tTakings: "+df1.format(getTakings()));
System.out.print("\t\tfree: "+getFreeSeats());
System.out.print(" reserved: "+getReservedSeats());
System.out.println(" booked: "+getBookedSeats());
}
public void displaySeatingPlan()
{
int i = 0;
int row = 1;
System.out.println("\n\t\t\t AB CD");
System.out.println("\t\t\t -----");
for (int j=1; j<=rows; j++) {
System.out.print("\t\t\t"+row+" - ");
row++;
for (int k=1; k <=cols; k++){
if (k == 3)
System.out.print(" ");
// endif
if (k % 4 == 0)
System.out.println(seats[i].getStatus());
else
System.out.print(seats[i].getStatus());
// endif
i++;
} // endfor
}// endfor
}

public void updateSeat (String seatNo, String pName, int status) throws IOException
{
Seat temp;
temp = getSeat(seatNo);
if (temp != null) {
temp.changeSeatStatus(status, pName);
if (temp.updated() != 0) {
switch (temp.updated())
{
case 1 : freeSeats++; // reserved to free
reservedSeats--;
if (!boarding || !closed){
statusMessage = "Seats available";
full = false;
}// endif
break;
case 2 : freeSeats++; // booked to free
bookedSeats--;
if (!boarding || !closed){
statusMessage = "Seats available";
full = false;
}// endif
break;
case 3 : freeSeats--; // free to reserved
reservedSeats++;
break;
case 4 : freeSeats--; // free to booked
bookedSeats++;
break;
case 5 : reservedSeats--; // reserved to booked
bookedSeats++;
break;
} // endswitch
} // endif
} // endif
if ( freeSeats == 0 ) {
full = true;
statusMessage = "Flight full";
}// endif
}
public void setTakings (String seatNo, float takings)
{
Seat temp;
temp = getSeat(seatNo);
if (temp != null) {
temp.setTakings(takings);
} // endif
}

//----- file handling methods ---------------
public void loadFromFile(String filename)
{
String textLine = "";
FileReader fr;
BufferedReader br;
Seat temp;
String seatNo = "";
String pName = "";
char pType = 'X';
String pInfo = "";
int status;
float takings;
try {
fr = new FileReader (filename);
br = new BufferedReader (fr);
while ((textLine = br.readLine()) != null) {
StringTokenizer st = new StringTokenizer (textLine, ",");
while (st.hasMoreTokens()) {
seatNo = st.nextToken();
pName = st.nextToken();
pType =st.nextToken().charAt(0);
pInfo = st.nextToken();
status = Integer.parseInt(st.nextToken());
takings = Float.parseFloat(st.nextToken());
temp = getSeat(seatNo);
temp.changeSeatStatus(status, pName, pType, pInfo);
setTakings (seatNo, takings);
if (status == 2)
bookedSeats++;
else
reservedSeats++;
// endif
freeSeats--;
}// endwhile
} // endwhile
fr.close();
br.close();
}catch (IOException e) {System.out.println("File not found");}
}
public void saveToFile(String filename)
{
FileWriter fw;
PrintWriter pw;
String textLine;
try {
fw = new FileWriter (filename);
pw = new PrintWriter (fw);
for (int i=0; i<24; i++){
if (seats[i].getStatus() != 0) {
textLine = seats[i].getNo() + ",";
textLine += seats[i].getPassDetails()+",";
textLine += seats[i].getStatus()+",";
textLine += seats[i].getTakings();
pw.println(textLine);
}
} // endfor
fw.close();
pw.close();
}catch (IOException e) {System.out.println("Unable to open file");}
}

//---------- helper methods -----------
private Seat getSeat(String searchValue)
{
int index = 0;
boolean found = true;
try{
while (!(seats[index].getNo().equalsIgnoreCase(searchValue))){
index++;
} // endwhile
}catch (ArrayIndexOutOfBoundsException e){
System.out.println("\n\t\tERROR - invalid seat number entered");
found = false;};
if (found)
return seats[index];
else
return null;
}
private float getTakings()
{
float takings = 0.0F;
for (int i=0; i<rows*cols; i++)
takings += seats[i].getTakings();
// endfor
return takings;
}
} // end of Flight class