Triangle area

package com.gmail.orfejka;
import java.util.Scanner;
import java.lang.Math;
public class Main {


	public static void main(String[] args) {
	
		Scanner sc = new Scanner(System.in);
		
		System.out.println("Type the triangle's sides length");

		double ab=sc.nextInt();
		
		double bc=sc.nextInt();
		
		double ac =sc.nextInt();
		
			if(ab+ac<bc||ab+bc<ac||bc+ac<ab)
			{
				System.out.println("It is impossible to construct a triangle with sides given length.");		
			}
			else
			{
				double trianglePerimeter= (ab+bc+ac)/2;
				double triangleArea=Math.sqrt((trianglePerimeter-ab)*
				(trianglePerimeter-ac)*(trianglePerimeter-bc));
		
				System.out.println("Triangle's area is: " + triangleArea);
			}
		
		sc.close();
		}

}