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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:

Java Basic Exercises: Find the k largest elements in a specified array.

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:

Flowchart: Java exercises: Find the k largest elements in a specified array.

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

Parsing dates:

import java.io.*;
import java.util.*;
import java.text.*;

String s = "2001/09/23 14:39";

SimpleDateFormat formatter = new SimpleDateFormat ("yyyy/MM/dd H:mm");
Date d = formatter.parse(s, new ParsePosition(0));