JAVA language ```javaimport java.util.*; // for Arrays classpublic class ReferenceMystery2 { public static void main(String[] args) { int x = 1; int[] a = new int[2]; mystery(x, a); System.out.println(x + " " + Arrays.toString(a)); x--; a[1] = a.length; mystery(x, a); System.out.println(x + " " + Arrays.toString(a)); } public static void mystery(int x, int[] list) { list[x]++; x++; System.out.println(x + " " + Arrays.toString(list)); }}```### Explanation:In this Java program, we have a class named `ReferenceMystery2` which contains two methods: the `main` method and a helper method named `mystery`.1. **`main` Method:** - Initializes an integer `x` with a value of 1. - Declares an integer array `a` of size 2 (`int[] a = new int[2]`) which means it contains two elements initially set to 0. - Calls the `mystery` method with the current value of `x` and the array `a`. - Prints the current value of `x` and the contents of the array `a` using `Arrays.toString(a)`. - Decrements `x`. - Sets the second element (`a[1]`) of the array `a` to the length of the array, which is 2. - Calls the `mystery` method again with the updated values. - Prints the final value of `x` and the contents of the array `a`.2. **`mystery` Method:** - Accepts an integer `x` and an integer array `list`. - Increments the value at the index `x` of the array. - Increments `x`. - Prints the modified value of `x` and the array `list`.The boxes labeled "line 1", "line 2", "line 3", and "line 4" seem to be placeholders and are not part of the Java code.

Here i written Output with better comments In Java. I hope you like it.code: code with comments for better understanding. package javaapplication13; import java.util.*;//for array class /** * * @author kdars */public class ReferenceMystery2 { //here define main method public static void main(String[] args) { //define var int x=1 int x = 1; //define 1D array of size 2 int[] a = new int[2]; //calling mystery function mystery(x, a); //print x value System.out.println(x + " " + Arrays.toString(a)); //decrease x value to 1 x--; //now define array element a[1] to size of array means to a[1]=2 a[1] = a.length; //now calling mystery function mystery(x, a); //print x value System.out.println(x + " " + Arrays.toString(a)); } //define mystery function with int x and list public static void mystery(int x, int[] list) { //increment list array elements list[x]++; //increment x x++; //print x System.out.println(x + " " + Arrays.toString(list)); }}Screenshot of code with editorOutput: line 1: 2 [0, 1]line 2: 1 [0, 1]line 3: 1 [1, 2]line 4: 0 [1, 2]