//二分查找; package ErfenChazhao; public class ErfenChaZhao { public static void main(String[] args) { //二分查找的数组必须已经排好序; int[] Array = {1,2,3,4,5,6,7,9,56,236,489}; int num = 1; int start = 0; int end = Array.length - 1; while (start <= end) { int middle = (start + end)/2; if (num == Array...