Find the maximum and minimum value in an array and multiply them

In this challenge, enter the value in one line as size of an array, and enter numbers separated by space as elements of array, find the maximum and minimum value of an array and multiply them.

	import java.util.*;
	public class PracticeDemo {
	public static void main(String [] args){
	Scanner sc=new Scanner(System.in);
	String arraySize=sc.nextLine();
	int size=Integer.parseInt(arraySize);
	String elements=sc.nextLine();
	String [] array=new String [size];
	int j=0,x=0,maximum=0,minimum=0;
	for(int i=0;i<elements.length();i++){
	if(String.valueOf(elements.charAt(i)).equals(" ")){
	array[j]=elements.substring(x,i);
	x=i+1;
	j++;
	}
	}
	array[j]=elements.substring(x,elements.length());
	maximum=Integer.parseInt(array[0]);
	minimum=Integer.parseInt(array[0]);
	for(int k=0;k<array.length;k++){
	if(Integer.parseInt(array[k])>maximum)
	maximum=Integer.parseInt(array[k]);
	else if(Integer.parseInt(array[k])<minimum)
	minimum=Integer.parseInt(array[k]);
	}
	System.out.print(maximum*minimum);
	sc.close();
	}
	}

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Output:
6
11 22 33 44 55 66
726