Exception:

SEATNOTAVAILABLEEXCEPTION

Sample Input and Output 1:

Enter the number of rows and columns of the show:
3
Enter the number of seats to be booked:
2
Enter the seat number 1
8
Enter the seat number 2
0
The seats booked are:
1 0 0
0 0 0
0 0 1

Sample Input and Output 2:

Enter the number of rows and columns of the show:
3
Enter the number of seats to be booked:
2
Enter the seat number 1
9
java.lang.ArrayIndexOutOfBoundsException: 9
The seats booked are:
0 0 0
0 0 0
0 0 0

Sample Input and Output 3:

Enter the number of rows and columns of the show:
4
Enter the number of seats to be booked:
3
Enter the seat number 1
15
Enter the seat number 2
14
Enter the seat number 3
15
SeatNotAvailableException: Already Booked
The seats booked are:
0 0 0 0
0 0 0 0
0 0 0 0
0 0 1 1


CODE:

public class SeatNotAvailableException extends Exception{
    SeatNotAvailableException(String a){
super(a);
}
}


import java.util.Scanner;
public class Main {
    public static void main(String args[]) throws SeatNotAvailableException{
        Scanner sc = new Scanner(System.in);
System.out.println("Enter the number of rows and columns of the show:");
int n = sc.nextInt();
System.out.println("Enter the number of seats to be booked:");
int num = sc.nextInt();
int seats[][] = new int[n][n]; //to be displayed
int user_seats[]=null;
//if (num>=0) {
//user_seats=new int[num];
//}
for(int r=0; r<n; r++) {
for(int c=0; c<n; c++) {
seats[r][c]=0;
}
}
for(int i=1; i<=num; i++) {
System.out.println("Enter the seat number "+i);
int seatNo = sc.nextInt();
//for(int p=0; p<n; p++) {
//for(int q=0; q<n; q++) {
try {
int count=-1;
for(int j=0; j<n; j++) { //traversing each element in matrix (seats)
for(int k=0; k<n; k++) {
count++;
if(seatNo>(n*n)-1) {
throw new SeatNotAvailableException("java.lang.ArrayIndexOutOfBoundsException: "+seatNo);
}else {
//user_seats[0]=seatNo;
if(count==seatNo) {
if(seats[j][k]!=1) {
seats[j][k]=1;
}else {
System.out.println("SeatNotAvailableException: Already Booked");
}
}
}
}
}
}catch(SeatNotAvailableException exp) {
System.out.println(exp.getMessage());
System.out.println("The seats booked are:");
for(int row=0; row<n; row++) {
for(int col=0; col<n; col++) {
System.out.print(seats[row][col]+" ");
}
System.out.println(" ");
}
System.exit(0);
}
}
/*int count=-1;
for(int j=0; j<n; j++) {
for(int k=0; k<n; k++) {
count++;
for(int index=0; index<num; index++) {
if(count==user_seats[index]) {
if(seats[j][k]!=1) {
seats[j][k]=1;
}else {
System.out.println("SeatNotAvailableException: Already Booked");
}
}
}
}
}*/
System.out.println("The seats booked are:");
for(int row=0; row<n; row++) {
for(int col=0; col<n; col++) {
System.out.print(seats[row][col]+" ");
}
System.out.println(" ");
}
}
}

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