Question

How to find the N largest elements in an array with Java

Answer 1

import java.util.List;
import java.util.Arrays;
import java.util.Collections;
import java.util.stream.Collectors;
 
public class MyClass {
 
    public static void kLargest(int[] arr, int N) {
        List<Integer> integerList = Arrays.stream(arr).boxed().
                                    sorted(Collections.reverseOrder()).
                                    collect(Collectors.toList());
         
        for (int i = 0; i < N; i++) {
            System.out.print(integerList.get(i) + " ");
        }
    }
 
    public static void main(String[] args) {
        int[] arr = new int[]{34, 3, 8, 2, 9, 4, 6, 12, 7};
         
        int N = 3;
         
        kLargest(arr, N);
    }
}
 
 
 
 
/*
run:
 
34 12 9 
 
*/

 

 

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