Test44.java

import java.util.Arrays;

/**
 * Author: 王俊超
 * Date: 2015-06-14
 * Time: 14:33
 * Declaration: All Rights Reserved !!!
 */
public class Test44 {
    /**
     * 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。
     * @param numbers
     * @return
     */
    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));


    }
}