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package proj6;

public class Airplane {
    private Seat [] seats;// array of 10 items

    * default constructor
    public Airplane() {
       seats = new Seat[10];
       int i;
       for ( i = 0; i < 4; i++) {
            seats[i] = new Seat(true, i + 1);
       for (; i < 10; i++) {
            seats[i] = new Seat(false, i + 1);
    * reverse a seat based on its type
    * @param type true is first class, false is coach
    * @return number of the reserved seat
    *          -1 if cannot reserve any seat
    public int reverse(boolean type){      
       Seat seat ;
       for (int i = 0; i < seats.length; i++) {
            seat = seats[i];
            if (seat.getBooleanType() == type &&
                   seat.isEmpty()) {...
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