Java Exercises: Find the k largest elements in a specified array
Java Basic: Exercise-159 with Solution
Write a Java program to find the k largest elements in a given array. Elements in the array can be in any order.
Pictorial Presentation:
Sample Solution:
Java Code:
import java.util.*;
public class Solution {
public static void main(String[] args)
{
Integer arr[] = new Integer[]{1, 4, 17, 7, 25, 3, 100};
int k = 3;
System.out.println("Original Array: ");
System.out.println(Arrays.toString(arr));
System.out.println(k +" largest elements of the said array are:");
Arrays.sort(arr, Collections.reverseOrder());
for (int i = 0; i < k; i++)
System.out.print(arr[i] + " ");
}
}
Sample Output:
Original Array: [1, 4, 17, 7, 25, 3, 100] 3 largest elements of the said array are: 100 25 17
Flowchart:
Java Code Editor:
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Previous: Write a Java program to create a two-dimension array (m x m) A[][] such that A[i][j] is true if I and j are prime and have no common factors, otherwise A[i][j] becomes false.
Next: Write a Java program to find the k smallest elements in a given array. Elements in the array can be in any order.
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Java: Tips of the Day
How to sort an ArrayList?
Collections.sort(testList); Collections.reverse(testList);
That will do what you want. Remember to import Collections though!
Ref: https://bit.ly/32urdSe
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