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referenceMystery2

Language/Type: Java parameters reference semantics

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

null 
public class ReferenceMystery2 {
    public static void main(String[] args) {
        int x = 1;
        int[] a = new int[4];

        x = x * 2;
        mystery(x, a);
        System.out.println(x + " " + Arrays.toString(a));

        x = x * 2;
        mystery(x, a);
        System.out.println(x + " " + Arrays.toString(a));
    }

    public static void mystery(int x, int[] a) {
        x = x * 2;

        if (x > 6) {
            a[2] = 14;
            a[1] = 9;
        } else {
            a[0] = 9;
            a[3] = 14;
        }

        System.out.println(x + " " + Arrays.toString(a));
    }
}
line 1
line 2
line 3
line 4

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