合并数组区间

 

import java.util.*;

/**

* Definition for an interval.

* public class Interval {

* int start;

* int end;

* Interval() { start = 0; end = 0; }

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

* }

*/

public class Solution {

public ArrayList<Interval> merge(ArrayList<Interval> list) {

ArrayList<Interval> mergeList = new ArrayList<>();

Collections.sort(list, (a, b) -> a.start - b.start);

int len = list.size();

int i = 0;

while (i < len) {

int left = list.get(i).start;

int right = list.get(i).end;

while (i < len - 1 && list.get(i + 1).start <= right) {

right = Math.max(right, list.get(i + 1).end);

i++;

}

mergeList.add(new Interval(left, right));

i++;

}

return mergeList;

}

}