Airplane

import java.util.*;
class Airplane {
    public static void main (String args[]) {
        String seat[] = {"X","X","X","X","X"};
        int old[] = {0, 0, 0, 0, 0};
        String empty = "X";
        while ((seat[0].equals(empty))||(seat[1].equals(empty))||(seat[2].equals(empty))||(seat[3].equals(empty))||(seat[4].equals(empty))){
            Scanner in = new Scanner(System.in);
            System.out.println("Hello. Enter seat choice. Between 1 and 5.");
            int choice = in.nextInt();
            if ((choice<1)||(choice>5)) {
                System.out.println("Error.");
            }
            else if (seat[choice-1].equals(empty)) {
                System.out.println("Seat available. Enter name.");
                String name = in.next();
                seat[choice-1] = name;
                System.out.println("Enter age.");
                int age = in.nextInt();
                old[choice-1] = age;
            }
            else {
                System.out.println("Seat unavailable. Enter seat choice again.");
                int choice2 = in.nextInt();
                if (seat[choice2-1].equals(empty)) {
                    System.out.println("Seat available. Enter name.");
                    String name2 = in.next();
                    seat[choice2-1] = name2;
                    System.out.println("Enter age.");
                    int age2 = in.nextInt();
                    old[choice2-1] = age2;
                }
                else {
                    System.out.println("Seat unavailable. Failure.");
                }
            }
            System.out.println("");
        }
        System.out.println("** All seats reserved. **");
        System.out.println("");
        System.out.println("Seat 1 : " + seat[0] + " (" + old[0] + ")");
        System.out.println("Seat 2 : " + seat[1] + " (" + old[1] + ")");
        System.out.println("Seat 3 : " + seat[2] + " (" + old[2] + ")");
        System.out.println("Seat 4 : " + seat[3] + " (" + old[3] + ")");
        System.out.println("Seat 5 : " + seat[4] + " (" + old[4] + ")");
        for (int i=0; i<=3; i++) {
            for (int j=0; j<=3-i; j++) {
                if (old[j] > old[j+1]) {
                    int temp = old[j];
                    old[j] = old[j+1];
                    old[j+1] = temp;
                    String temp2 = seat[j];
                    seat[j] = seat[j+1];
                    seat[j+1] = temp2;
                }
            }
        }
        System.out.println("");
        System.out.println("Sorted by Age.");
        for (int e=0; e<=4; e++){
            System.out.println(seat[e] + " (" + old[e] + ")");
        }
        int target = 15;
        int min = 0;
        int high = 4;
        boolean found = false;
        int answer = 0;
        int mid = 0;
        while ((found==false)&&(min<=high)) {
            mid = ((min+high)/2);
            if (old[mid]==target) {
                found = true;
                answer = min;
            }
            else if (target>old[mid]) {
                min = mid+1;
            }
            else {
                high = mid-1;
            }
        }
        System.out.println("");
        if (found == true) {
            System.out.println("Age " + target + " found at array index " + answer + ".");
        }
        else {
            System.out.println("Age " + target + " was not found.");
        }
    }
}