InternationalTrip.java

public class InternationalTrip extends Trip{
    private boolean passportRequired;
    private String currency;

    public InternationalTrip(String destination, int days, boolean passportRequired, String currency){

        super(destination,days);
        this.passportRequired = passportRequired;
        this.currency = currency;


    }
    public String toString(){
        return super.toString() + " \nPassport Required : " + passportRequired +
                "\n Currency " + currency;
    }



    public boolean equals(InternationalTrip other){
        return super.equals(other) && this.passportRequired == other.passportRequired  &&
                this.currency.equals(other.currency) ;

    }
    public InternationalTrip extend(Trip other){
        String newDestination =  getDestination() + "&" + other.getDestination();
        int newDays = this.getDays() + other.getDays();
        return new InternationalTrip(newDestination, newDays, this.passportRequired,this.currency);

    }



}