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package solution.study;import java.util.Arrays;/** * Created by Anjude * Date: 2021/4/18 23:28 * 注意数组中可能出现负数 */public class MaxProduct {       public static void main(String[] args) {           System.out.println(sort(new int[]{   1, 2, 3, 4, 5, 6}));        System.out.println(getMaxMin(new int[]{   1, 2, 3, 4, 5, 6}));    }    // 线性扫描    private static int getMaxMin(int[] nums) {           int min1 = Integer.MAX_VALUE, min2 = min1;        int max1 = Integer.MIN_VALUE, max2 = max1, max3 = max1;        for (int x : nums) {               if (x < min1) {                   min2 = min1;                min1 = x;            } else if (x < min2) {                   min2 = x;            }            if (x > max1) {                   max3 = max2;                max2 = max1;                max1 = x;            } else if (x > max2) {                   max3 = max2;                max2 = x;            } else if (x > max3) {                   max3 = x;            }        }        return Math.max(min1 * min2 * max1, max1 * max2 * max3);    }    private static int sort(int[] nums) {           Arrays.sort(nums);        int n = nums.length;        return Math.max(nums[0] * nums[1] * nums[n - 1], nums[n - 1] * nums[n - 2] * nums[n - 3]);    }}

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