public class Main{ public static class BO { public int v; public BO(int v) { this.v = v; } } public static void main(String[] args) { BO a = new BO(1); BO b = new BO(2); BO c = new BO(3); BO[] arr = {a, b, c}; BO t = arr[0]; arr[0] = arr[2]; arr[2] = t; arr[1].v = arr[0].v; System.out.println(..