Answer:
See explaination
Explanation:
class Seat {
private boolean available;
private int tier;
public Seat(boolean isAvail, int tierNum)
{ available = isAvail;
tier = tierNum; }
public boolean isAvailable() { return available; }
public int getTier() { return tier; }
public void setAvailability(boolean isAvail) { available = isAvail; } }
//The Theater class represents a theater of seats. The number of seats per row and the number of tier 1 and tier 2 rows are
//determined by the parameters of the Theater constructor.
//Row 0 of the theaterSeats array represents the row closest to the stage.
public class Theater {
private Seat[][] theaterSeats; /** Constructs a Theater object, as described in part (a). * Precondition: seatsPerRow > 0; tier1Rows > 0; tier2Rows >= 0 */
public Theater(int seatsPerRow, int tier1Rows, int tier2Rows) {
theaterSeats= new Seat[tier1Rows+tier2Rows][seatsPerRow];
}
public boolean reassignSeat(int fromRow, int fromCol, int toRow, int toCol) {
if(theaterSeats[toRow][toCol].isAvailable()) {
int tierDestination =theaterSeats[toRow][toCol].getTier();
int tierSource =theaterSeats[fromRow][fromCol].getTier();
if(tierDestination<=tierSource) {
if(tierDestination==tierSource) {
if(fromRow<toRow) {
return false;
}else {
theaterSeats[toRow][toCol].setAvailability(false);
theaterSeats[fromRow][fromCol].setAvailability(true);
return true;
}
}
theaterSeats[toRow][toCol].setAvailability(false);
theaterSeats[fromRow][fromCol].setAvailability(true);
return true;
}else {
return false;
}
}else {
return false;
}
}
public static void main(String[] args) {
//Lets understand it with simple example
Theater t1 = new Theater(3,1,2);
//Our threater has 3 seat in each row and we have one tier 1 row and 1 tier 2 row
//total no of seat will be 9.
//Lets create our seat
t1.theaterSeats[0][0] = new Seat(true,1);
t1.theaterSeats[0][1] = new Seat(false,1);
t1.theaterSeats[0][2] = new Seat(true,1);
t1.theaterSeats[1][0] = new Seat(true,2);
t1.theaterSeats[1][1] = new Seat(true,2);
t1.theaterSeats[1][2] = new Seat(true,2);
t1.theaterSeats[2][0] = new Seat(false,2);
t1.theaterSeats[2][1] = new Seat(false,2);
t1.theaterSeats[2][2] = new Seat(true,2);
//Lets print out theater and see which seat is available or which is not
System.out.println("Theater===>");
for(int i=0;i<3;i++) {
for(int j=0;j<3;j++) {
System.out.print("["+i+"]"+"["+j+"] : "+t1.theaterSeats[i][j].isAvailable()+" ");
}
System.out.println();
}
System.out.println("(2,1) want to change seat to (0,0)");
System.out.println("["+2+"]"+"["+1+"]"+"===>"+"["+0+"]"+"["+0+"]");
t1.reassignSeat(2, 1, 0, 0);
for(int i=0;i<3;i++) {
for(int j=0;j<3;j++) {
System.out.print("["+i+"]"+"["+j+"] : "+t1.theaterSeats[i][j].isAvailable()+" ");
}
System.out.println();
}
}
}
