package org.alohaworld.mactest;import java.util.Arrays;public class BuyBlockTest {    /**     * 面试题选出股票的买入和卖出时机，使盈利最大     *      * @param args     *            股票数据数组     * @return 买入时间点和卖出时间点，买入点时的点数，卖出点时的点数     */    public static int[] getInAndOutPoint(int[] args) {        if (null == args || args.length <= 1) {            return new int[] { 0, 0, 0, 0 };        }        int in = 0, out = 0, next = 0;        for (int i = 0; i < args.length; i++) {            if (args[i] < args[next]) {                next = i;            }            if ((args[i] - args[next]) > (args[out] - args[in])) {                in = next;                out = i;            } else if (args[i] > args[out]) {                out = i;            }        }        return new int[] { in + 1, out + 1, args[in], args[out] };    }    public static void main(String[] args) {        int[] a = new int[] { 9, 6, 7, 6, 7, 8, 99, -1, 99 };        int[] result = getInAndOutPoint(a);        System.out.println(Arrays.toString(result));    }}