Milestone1.java

package Milestone1;

import java.time.LocalDate;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;


public class Train{

  long trainno;
  String source,dest;
  int soudist,destdist;
  String[] coaches;
  int[] availseats;
  int len;
Map<LocalDate,int[]>seatMatrix=new HashMap<>();
 Train(long t,String s,String d,int sd,int dd,String[] c,int[] a){
    this.trainno=t;
    this.source=s;
    this.dest=d;
    this.soudist=sd;
    this.destdist=dd;
    this.coaches=c;
    this.availseats=a;
}
void disp()
    {
        System.out.println("The train "+this.trainno+" is available from "+this.source+" to "+this.dest);
    }
    
boolean book(String source,String dest,LocalDate date,String coa,int num,int ticknum)
    {
        try {
            if (!this.seatMatrix.containsKey(date)) { 
                this.seatMatrix.put(date, new int[4]);
            }

            for(int i=0;i<coaches.length;i++)
            {
                  if(coaches[i].charAt(0)=='S')
                  {
                      seatMatrix.get(date)[0] += availseats[i];
                  }
                  else if(coaches[i].charAt(0)=='A')
                  {
                      seatMatrix.get(date)[1] += availseats[i];
                  }
                  else if(coaches[i].charAt(0)=='B')
                  {
                      seatMatrix.get(date)[2] += availseats[i];
                  }
                  else 
                  {
                      seatMatrix.get(date)[3] += availseats[i];
                  }
            }
              
           if (coa.charAt(0) == 'S' && (seatMatrix.get(date)[0]>=num))
            {
                seatMatrix.get(date)[0]-=num;
                System.out.println(ticknum+" "+Math.abs(this.soudist-this.destdist)*1*num);
            }
            else if(coa.charAt(0) == '3' && (seatMatrix.get(date)[1]>=num))
            {
                seatMatrix.get(date)[1]-=num;
                System.out.println(ticknum+" "+Math.abs(this.soudist-this.destdist)*2*num);
            } 
            else if(coa.charAt(0) == '2' && (seatMatrix.get(date)[2]>=num))
            {
                seatMatrix.get(date)[2]-=num;
                System.out.println(ticknum+" "+Math.abs(this.soudist-this.destdist)*3*num);
            }
            else if(coa.charAt(0) == '1' && (seatMatrix.get(date)[3]>=num))
            {
                seatMatrix.get(date)[3]-=num;
                System.out.println(ticknum+" "+Math.abs(this.soudist-this.destdist)*4*num);
            }
            else 
            {
                System.out.println("Not enough seats available!Try with a lesser number");
            }    
        return true;  
        } catch (Exception e) {
            System.out.println("The booking failed due to "+e.getMessage());
            System.out.println("Please try again");
            return false;
        }
    }
public static void main(String[] args) {
        int ticknum=10000001;
        String p[]={"S1","S2","B1","A1","H1"};
        String s[]={"S1","S2","S3","B1","B2"};
        int q[]={72,72,72,48,24};
        int r[]={15,20,50,36,48};
        Train[] trains = new Train[2];
        trains[0] = new Train(17726, "Rajkot","Mumbai",0,750,p,q);
        trains[1] = new Train(37392,"Ahmedabad","Surat",0,300,s,r);
        System.out.println("Welcome to the Railways!");
        while(true)
        {
            Scanner sc=new Scanner(System.in);
            System.out.println("Write book for booking else exit for exit");
            String in=sc.nextLine(),out="exit";

            if(in.equals(out))
            {
                System.out.println("Thank You for choosing Indian Railways");
                System.out.println("We hope to serve you again some day");
                break;
            }
            else
            {
                for (Train train : trains) {
                    train.disp();
                }
                System.out.println("Please enter the booking details in the format(in space-separated form):");
                System.out.println("Source Destination Date(YYYY/MM/DD) Coach Number-of-passengers");
                System.out.println("The following is the convention for respective type of coach");
                System.out.println("SL-Sleeper");
                System.out.println("3A-3 Tier AC");
                System.out.println("2A-2 Tier AC");
                System.out.println("1A-First Class AC");
                String input=sc.nextLine();
                String[] inputs=input.split(" ");
                String source=inputs[0];
                String dest=inputs[1];
                LocalDate date=LocalDate.parse(inputs[2]);
                String coa=inputs[3];
                int num=Integer.parseInt(inputs[4]);
                int check=0;
                
                
                for (Train train : trains) {
                    if(train.source.equals(source) && train.dest.equals(dest) && train.book(source,dest,date,coa,num,ticknum)==true)
                    {
                        // train.book(source,dest,date,coa,num,ticknum);
                        ticknum++;
                        check++;
                    }
                }
                if(check==0){
                    System.out.println("No such trains available for the following source and destination");
                }

            }
        }
        
    }
}
//OUTPUT
Welcome to the Railways!
Write book for booking else exit for exit
book
The train 17726 is available from Rajkot to Mumbai
The train 37392 is available from Ahmedabad to Surat
Please enter the booking details in the format(in space-separated form):
Source Destination Date(YYYY/MM/DD) Coach Number-of-passengers
The following is the convention for respective type of coach
SL-Sleeper
3A-3 Tier AC
2A-2 Tier AC
1A-First Class AC
Rajkot Surat 2023-04-15 SL 144
No such trains available for the following source and destination
Write book for booking else exit for exit
book
The train 17726 is available from Rajkot to Mumbai
The train 37392 is available from Ahmedabad to Surat
Please enter the booking details in the format(in space-separated form):
Source Destination Date(YYYY/MM/DD) Coach Number-of-passengers
The following is the convention for respective type of coach
SL-Sleeper
3A-3 Tier AC
2A-2 Tier AC
1A-First Class AC
Rajkot Surat 2023-04-15 SL 144
No such trains available for the following source and destination
Write book for booking else exit for exit
book
The train 17726 is available from Rajkot to Mumbai
The train 37392 is available from Ahmedabad to Surat
Please enter the booking details in the format(in space-separated form):
Source Destination Date(YYYY/MM/DD) Coach Number-of-passengers
The following is the convention for respective type of coach
SL-Sleeper
3A-3 Tier AC
2A-2 Tier AC
1A-First Class AC
Rajkot Surat 2023-04-15 SL 144
No such trains available for the following source and destination
Write book for booking else exit for exit
book
The train 17726 is available from Rajkot to Mumbai
The train 37392 is available from Ahmedabad to Surat
Please enter the booking details in the format(in space-separated form):
Source Destination Date(YYYY/MM/DD) Coach Number-of-passengers
The following is the convention for respective type of coach
SL-Sleeper
3A-3 Tier AC
2A-2 Tier AC
1A-First Class AC
Rajkot Mumbai 2023-04-15 SL 144
10000001 108000
Write book for booking else exit for exit
book
The train 17726 is available from Rajkot to Mumbai
The train 37392 is available from Ahmedabad to Surat
Please enter the booking details in the format(in space-separated form):
Source Destination Date(YYYY/MM/DD) Coach Number-of-passengers
The following is the convention for respective type of coach
SL-Sleeper
3A-3 Tier AC
2A-2 Tier AC
1A-First Class AC
Rajkot Mumbai 2023-04-15 SL 144
Not enough seats available!Try with a lesser number
Write book for booking else exit for exit
book
The train 17726 is available from Rajkot to Mumbai
The train 37392 is available from Ahmedabad to Surat
Please enter the booking details in the format(in space-separated form):
Source Destination Date(YYYY/MM/DD) Coach Number-of-passengers
The following is the convention for respective type of coach
SL-Sleeper
3A-3 Tier AC
2A-2 Tier AC
1A-First Class AC
Rajkot Surat 2023-04-15 SL 144
No such trains available for the following source and destination
Write book for booking else exit for exit
book
The train 17726 is available from Rajkot to Mumbai
The train 37392 is available from Ahmedabad to Surat
Please enter the booking details in the format(in space-separated form):
Source Destination Date(YYYY/MM/DD) Coach Number-of-passengers
The following is the convention for respective type of coach
SL-Sleeper
3A-3 Tier AC
2A-2 Tier AC
1A-First Class AC
Rajkot Surat 2023-04-15 SL 144
No such trains available for the following source and destination
Write book for booking else exit for exit
book
The train 17726 is available from Rajkot to Mumbai
The train 37392 is available from Ahmedabad to Surat
Please enter the booking details in the format(in space-separated form):
Source Destination Date(YYYY/MM/DD) Coach Number-of-passengers
The following is the convention for respective type of coach
SL-Sleeper
3A-3 Tier AC
2A-2 Tier AC
1A-First Class AC
Rajkot Mumbai 2023-04-15 SL 144
Not enough seats available!Try with a lesser number
Write book for booking else exit for exit
book
The train 17726 is available from Rajkot to Mumbai
The train 37392 is available from Ahmedabad to Surat
Please enter the booking details in the format(in space-separated form):
Source Destination Date(YYYY/MM/DD) Coach Number-of-passengers
The following is the convention for respective type of coach
SL-Sleeper
3A-3 Tier AC
2A-2 Tier AC
1A-First Class AC
Rajkot Mumbai 2023-04-15 SL 145
Not enough seats available!Try with a lesser number
Write book for booking else exit for exit
exit
Thank You for choosing Indian Railways
We hope to serve you again some day