Java Triangle Area by Given Points

import java.util.Scanner;


public class TriangleArea {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int x1 = input.nextInt();
        int y1 = input.nextInt();
        int x2 = input.nextInt();
        int y2 = input.nextInt();
        int x3 = input.nextInt();
        int y3 = input.nextInt();

        int area = (x1 * (y2 - y3) + x2 * (y3 - y1) + x3 * (y1 - y2)) / 2;

        if (area < 0) {
            area = area * -1;
        }

        System.out.println(area);
    }

}