# 606.Kth Largest Element II

## 1.Description(Medium)

Find K-th largest element in an array. and N is much larger than k.

### Notice

You can swap elements in the array

**Example**

In array`[9,3,2,4,8]`, the`3rd`largest element is`4`.

In array`[1,2,3,4,5]`, the`1st`largest element is`5`,`2nd`largest element is`4`,`3rd`largest element is`3`and etc.

[**Tags**](https://www.lintcode.com/en/problem/kth-largest-element-ii/#tags)

[Heap](https://www.lintcode.com/tag/heap/)

## 2.Code

用minheap维护。

```
//Version 1:minheap
    public int kthLargestElement2(int[] nums, int k) {
        Queue<Integer> queue=new PriorityQueue<Integer>(k);
        for(int i=0;i<nums.length;i++){
            if(queue.size()<k){
                queue.offer(nums[i]);
            }else{
                if(queue.peek()<nums[i]){
                    queue.poll();
                    queue.offer(nums[i]);
                }
            }
        }
        return queue.peek();
    }

    //version 2:minheap
    public int kthLargestElement22(int[] nums, int k){
         Queue<Integer> queue=new PriorityQueue<Integer>(k);
         for(int element:nums){
             queue.offer(element);
             if(queue.size()>k){
                 queue.poll();
             }
         }
         return queue.peek();
    }
```


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