【剑指Offer 44】扑克牌的顺子

题目：从扑克牌中随机抽5张牌，判断是不是一个顺子， 即这5张牌是不是连续的。2～10为数字本身， A为1。 J为11、Q为12、 为13。小王可以看成任意数字。

代码如下：

package demo;

import java.util.Arrays;

/**
 * 扑克牌的顺子
 * 
 * @author xiangdonglee
 *
 */
public class Test44 {
    public static boolean isContinuous(int[] numbers) {
        if (numbers == null || numbers.length != 5) {
            return false;
        }
        // 对元素进行排序
        Arrays.sort(numbers);
        int numberOfZero = 0;
        int numberOfGap = 0;
        for (int i = 0; i < numbers.length && numbers[i] == 0; i++) {
            numberOfZero++;
        }
        // 第一个非0元素的位置
        int small = numberOfZero;
        int big = small + 1;
        while (big < numbers.length) {
            if (numbers[small] == numbers[big]) {
                return false;
            }
            numberOfGap += (numbers[big] - numbers[small] - 1);
            small = big;
            big++;
        }
        return numberOfGap <= numberOfZero;
    }

    public static void main(String[] args) {
        int[] numbers1 = { 1, 3, 2, 5, 4 };
        System.out.println(isContinuous(numbers1));

        int[] numbers2 = { 1, 3, 2, 6, 4 };
        System.out.println(isContinuous(numbers2));

        int[] numbers3 = { 0, 3, 2, 6, 4 };
        System.out.println(isContinuous(numbers3));

        int[] numbers4 = { 0, 3, 1, 6, 4 };
        System.out.println(isContinuous(numbers4));

        int[] numbers5 = { 1, 3, 0, 5, 0 };
        System.out.println(isContinuous(numbers5));

        int[] numbers6 = { 1, 3, 0, 7, 0 };
        System.out.println(isContinuous(numbers6));

        int[] numbers7 = { 1, 0, 0, 5, 0 };
        System.out.println(isContinuous(numbers7));

        int[] numbers8 = { 1, 0, 0, 7, 0 };
        System.out.println(isContinuous(numbers8));

        int[] numbers9 = { 3, 0, 0, 0, 0 };
        System.out.println(isContinuous(numbers9));

        int[] numbers10 = { 0, 0, 0, 0, 0 };
        System.out.println(isContinuous(numbers10));

        int[] numbers11 = { 1, 0, 0, 1, 0 };
        System.out.println(isContinuous(numbers11));
    }
}

来源：http://blog.csdn.net/derrantcm/article/details/46798661