leetcode 57. Insert Interval

package com.bupt;

import java.util.ArrayList;
import java.util.List;

//Given a set of non-overlapping intervals, insert a new interval into the intervals (merge if necessary).
//
//You may assume that the intervals were initially sorted according to their start times.
//
//Example 1:
//Given intervals [1,3],[6,9], insert and merge [2,5] in as [1,5],[6,9].
//
//Example 2:
//Given [1,2],[3,5],[6,7],[8,10],[12,16], insert and merge [4,9] in as [1,2],[3,10],[12,16].
//
//This is because the new interval [4,9] overlaps with [3,5],[6,7],[8,10].


class Interval {
    int start;
    int end;
    Interval() { start = 0; end = 0; }
    Interval(int s, int e) { start = s; end = e; }
}

public class Solution {
    public static List<Interval> insert(List<Interval> intervals, Interval newInterval) {
    	List<Interval> result = new ArrayList<Interval>();
    	while(intervals.size() == 0){
    		result.add(newInterval);
    		return result;
    	}
    	int i = 0;
    	while(i<intervals.size() && newInterval.start>intervals.get(i).end){
    		result.add(intervals.get(i));
    		i++;
    	}
    	if(i<intervals.size()){
    		newInterval.start = Math.min(newInterval.start, intervals.get(i).start);
    	}
    	result.add(newInterval);
    	while(i<intervals.size() && newInterval.end>=intervals.get(i).start){
    		newInterval.end = Math.max(newInterval.end, intervals.get(i).end);
    		i++;
    	}
    	while(i<intervals.size()){
    		result.add(intervals.get(i));
    		i++;
    	}
    	return result;
    }
    public static void main(String[] args){
    	Interval interval1 = new Interval(1,5);
//    	Interval interval2 = new Interval(10,11);
//    	Interval interval3 = new Interval(15,16);
//    	Interval interval4 = new Interval(9,11);
    	
    	Interval newInterval = new Interval(0,1);
    	List<Interval> intervals = new ArrayList<Interval>();
    	intervals.add(interval1);
//    	intervals.add(interval2);
//    	intervals.add(interval3);
//    	intervals.add(interval4);
    	
    	List<Interval> result = insert(intervals,newInterval);
    	for(int i = 0;i<result.size();i++){
    		System.out.PRintln(result.get(i).start+" "+result.get(i).end);
    	}
    }
}