```
/**
* 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; }
* }
*/
class Solution {
public boolean canAttendMeetings(Interval[] intervals) {
if (intervals.length == 0 || intervals.length == 1)
return true;
Arrays.sort(intervals, new Comparator<Interval>() {
public int compare(Interval i1, Interval i2) {
return i1.start - i2.start;
}
});
for (int i = 1; i < intervals.length; i++) {
if (intervals[i].start >= intervals[i - 1].end) {
continue;
}
return false;
}
return true;
}
}
```