Implement swap() method to swap two integers using an array.
public class Main { public static void main(String[] args) { int[] num = { 1, 2 }; System.out.println("Before swap"); System.out.println("#1: " + num[0]); System.out.println("#2: " + num[1]); // Call the swap() method passing the num array swap(num);/*www. j a va2 s. c om*/ System.out.println("After swap"); System.out.println("#1: " + num[0]); System.out.println("#2: " + num[1]); } // The swap() method accepts an int array as argument and swaps the values // if array contains two values. public static void swap(int[] source) { if (source != null && source.length == 2) { // Swap the first and the second elements int temp = source[0]; source[0] = source[1]; source[1] = temp; } } }