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Question about Java programming?
My assignment was to create a program of a ticket booking system using java.
The program should print out a summary of the tickets booked. If the user booked more than 1 tickets, it is correct to use "counter"?
4 Answers
- Black RoseLv 51 decade agoFavorite Answer
import javax.swing.JOptionPane;
public class TicketSystem{
private static final int MAX_TICKETS = 50;
private int MAX_MOVIES = 5;
private String MOVIE[];
private int SOLD[];
public TicketSystem(){
MOVIE = new String[MAX_MOVIES];
SOLD = new int[MAX_MOVIES];
}
public TicketSystem(int max_movies){
setMAX_MOVIES(max_movies);
MOVIE = new String[MAX_MOVIES];
SOLD = new int[MAX_MOVIES];
}
public void setMAX_MOVIES(int max_movie){
MAX_MOVIES = (max_movie>=0)?max_movie:MAX_MOVIES;
}
public int getMAX_MOVIES(){
return MAX_MOVIES;
}
public int getMAX_TICKETS(){
return MAX_TICKETS;
}
public boolean setMovie(String[] movie){
if(movie.length>this.MAX_MOVIES){
JOptionPane.showMessageDialog( null, "Array Length Exceeding No. of Movies!!!",
"ERROR" ,JOptionPane.ERROR_MESSAGE);
return false;
}
else if(movie.length<this.MAX_MOVIES){
JOptionPane.showMessageDialog( null, "Array Length Deceed No. of Movies!!!",
"ERROR", JOptionPane.ERROR_MESSAGE);
return false;
}
else{
for(int index=0; index<MAX_MOVIES; index++)
MOVIE[index] = movie[index];
}
return true;
}
public boolean getMovie(String[] movie){
if(movie.length>this.MAX_MOVIES){
JOptionPane.showMessageDialog( null, "Array Length Exceeding No. of Movies!!!",
"ERROR", JOptionPane.ERROR_MESSAGE);
return false;
}
else if(movie.length<this.MAX_MOVIES){
JOptionPane.showMessageDialog( null, "Array Length Deceed No. of Movies!!!",
"ERROR", JOptionPane.ERROR_MESSAGE);
return false;
}
else{
for(int index=0; index<MAX_MOVIES; index++)
movie[index] = MOVIE[index];
}
return true;
}
private void setSold(int movie, int tickets){
SOLD[movie]+=tickets;
}
private int getSold(int movie){
return SOLD[movie];
}
public boolean reserve(int movie, int tickets){
// validate value of movie & tickets
// if valide:
// update SOLD[moive]
// return true
// else:
// show error message
// return flase
if( movie<0 || movie>=MAX_MOVIES ){
JOptionPane.showMessageDialog( null, "Movie is not Available",
"ERROR", JOptionPane.ERROR_MESSAGE);
return false;
}
else if( tickets<=0 ){
JOptionPane.showMessageDialog( null, "No. of Tickets is not Valid",
"ERROR", JOptionPane.ERROR_MESSAGE);
return false;
}
else{
int remained = MAX_TICKETS-getSold(movie);
if(tickets>MAX_TICKETS || tickets>remained){
JOptionPane.showMessageDialog( null, "Available tickets can't cover your want\n"
+ "We still have <" + remained + "> seat available",
"WARNING", JOptionPane.WARNING_MESSAGE);
return false;
}
else{
JOptionPane.showMessageDialog( null, tickets + " tickets reserved for "
+ MOVIE[movie],
"Reserved OK", JOptionPane.INFORMATION_MESSAGE);
setSold(movie, tickets);
}
}
return true;
}
public boolean dereserve(int movie, int tickets){
// validate value of movie & tickets
// if valide:
// update SOLD[moive]
// return true
// else:
// show error message
// return flase
return true;
}
}
- 1 decade ago
I'm not quite sure what you're asking. Are you trying to keep track of the total number of tickets booked by a customer?
If so, you can use a variable called "counter" if you want. You may want to name it something a little more intuitive like "numOfTickets" or "ticketQuantity" or something.
Sorry, I'm not so sure I'm getting what you're after.
- 5 years ago
Why roll your own when there is in all likelihood a calendar widget you can reuse? By the way, the Java API itself provides many useful classes and interfaces: Date, Calendar, GregorianCalendar, DateFormat, and SimpleDateFormat.
