class Solution {
public int findKthLargest(int[] nums, int k) {
//最小堆,堆顶就是最小,比较元素和堆顶的大小,如果比他大,就更新这个堆
PriorityQueue<Integer> heap = new PriorityQueue<>(k, (a,b)->(a-b));
for (int i = 0; i < nums.length; i++) {
if (i < k) heap.add(nums[i]);
else{
if (heap.peek() < nums[i]) {
heap.poll();
heap.add(nums[i]);
}
}
// System.out.println(heap.peek());
}
return heap.peek();
}
}