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referenceMystery

Author: Marty Stepp (on 2010/12/28)

The following program produces 4 lines of output. Write each line of output below as it would appear on the console. 

import java.util.*;   // for Arrays class

public class Island {
    int lat;
    int lng;

    public Island(int initialLat, int initialLng) {
        lat = initialLat;
        lng = initialLng;
    }
}

public class ReferenceMystery {
    public static void main(String[] args) {
        int n = 4;
        int[] a = {8, 15};
        Island isle = new Island(16, 23);

        mystery(n, a, isle);
        System.out.println(n + " " + Arrays.toString(a) + " " + isle.lat + " " + isle.lng);

        n++;
        a[0] += 2;
        isle.lat = 42;

        mystery(n, a, isle);
        System.out.println(n + " " + Arrays.toString(a) + " " + isle.lat + " " + isle.lng);
    }

    public static void mystery(int n, int[] a, Island isle) {
        n = n - 2;
        a[1]++;
        isle.lng += 100;
        System.out.println(n + " " + Arrays.toString(a) + " " + isle.lat + " " + isle.lng);
    }
}
line 1
line 2
line 3
line 4

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