lintcode 容易题：Insert Interval 插入区间

/**
 * Definition of Interval:
 * public classs Interval {
 *     int start, end;
 *     Interval(int start, int end) {
 *         this.start = start;
 *         this.end = end;
 *     }
 */

class Solution {
    /**
     * Insert newInterval into intervals.
     * @param intervals: Sorted interval list.
     * @param newInterval: A new interval.
     * @return: A new sorted interval list.
     */
    public ArrayList<Interval> insert(ArrayList<Interval> intervals, Interval newInterval) {
        ArrayList<Interval> result = new ArrayList<Interval>();
        // write your code here
        if(intervals==null ||intervals.size()<=0){
             result.add(newInterval);
            return result;
        }
        int insertPos = 0;
        for(int i=0;i<intervals.size();i++){
            Interval curt = intervals.get(i);
            if(curt.end<newInterval.start){
                result.add(curt);
                insertPos++;
            } else if(curt.start>newInterval.end){
                result.add(curt);
            }else{
                newInterval.start = Math.min(curt.start,newInterval.start);
                newInterval.end = Math.max(curt.end,newInterval.end);
            }
            
        }
        result.add(insertPos,newInterval);
        return result;
    }
}