题解 | 向量叉乘

import java.util.*;


public class Solution {
    /**
     * 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可
     *
     * 计算出这两个向量叉乘的结果
     * @param vector1 int整型一维数组
     * @param vector2 int整型一维数组
     * @return int整型ArrayList
     */
    public ArrayList<Integer> crossTimes (int[] vector1, int[] vector2) {
        Integer i, j, k = 0;
        i = vector1[1] * vector2[2] - vector1[2] * vector2[1];
        j = vector1[0] * vector2[2] - vector1[2] * vector2[0];
        k = vector1[0] * vector2[1] - vector1[1] * vector2[0];

        ArrayList<Integer> result = new ArrayList<Integer>();
        result.add(i);
        result.add(-j);
        result.add(k);
        return  result;
    }
}