LeetCode-Summary Ranges

注意循环的结束点 最后一个数字还没有加进去 所以循环后继续做一遍

public class Solution {    public List<String> summaryRanges(int[] nums) {        List<String> list = new ArrayList<String>();        if ( nums == null || nums.length == 0)            return list;        int left = 0;        for ( int i = 0; i < nums.length - 1; i ++ ){            if ( nums[ i + 1 ] != nums[i] + 1 ){                String str;                if ( left == i)                     str = Integer.toString(nums[left]);                else                    str = Integer.toString(nums[left]) + "->" + Integer.toString(nums[i]);                list.add(str);                left = i + 1;            }        }        String str;        if ( left == nums.length -1 )            str = Integer.toString(nums[left]);        else            str = Integer.toString(nums[left]) + "->" + Integer.toString(nums[nums.length-1]);          list.add(str);        return list;    }}