find third largest element in an Arrays or List

There are multiple way to find third largest element in an Arrays or List in java.

Using Stream.skip() method :-

First convert Arrays to list using Arrays.asList method
Now, get Stream data from List using arrayList.stream() method
Sort arrayList in reverse order using Comparator.reverseOrder() inside Stream.sorted() method
To arrayList sorted in reverse order, 3rd element in the list will be the third longest element
We will skip first 2 element which is the longest and 2nd longest element using Stream.skip() method.
findFirst() method will return 3rd longest String in the arrayList.
Inside if condition we validate 3rd longest element is not equals to null.
Now we will print 3rd longest element from get() method.

Using size() method :-

First we find size of array using length() method.
Now we sort the elements of the given array using the sort method of the java.util.Arrays class.
Here array[size-3] is give the 3rd position of element.
Now we will print 3rd longest element.

				
					import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.Optional;

public class ThirdLargestElement {
	public static void main(String[] args) {
		List<Integer> arrayList = Arrays.asList(220, 2, 16, 238, 185);

		// Stream.skip() method
		Optional<Integer> str = arrayList.stream().sorted(Comparator.reverseOrder()).skip(2).findFirst();
		if (str != null) {
			System.out.println("3rd largest element are :- " + str.get());
		}
		// Using size method
		int array[] = {220, 2, 16, 238, 185};
		int size = array.length;
		Arrays.sort(array);
		int in = array[size - 3];
		System.out.println("3rd largest element are :" + in);
	}
}

Output :-
3rd largest element are :- 185
3rd largest element are :185