Please assist. I want to add an array to my area calculation of a triangle

Question

Yes, it compliles and runs,with just one set of integers, but I want to be able to calculate 3,4, 5 and 1,10, 2 as well using arrays. and I don't understand arrays enough to do this.
public class Heron{
private static void main (String [] args)
int a=3;
int b=3;
int c=3;
float s= (a+b+c)/2;
float y=s*((s-a)+(s-b)+(s-c));
if (s > a && s > b && s > c)
System.out.println ("The area of the triangle is " + Math.sqrt (y));
else
System.out.println ("Value=0");
}

Answer 1

public class Euclidean {
     static int [] triangle;
     private static void main (String [] args) {
         if(args.length == 0) {
             System.out.println("Specify length and height");
             System.exit(0);
         } else if(args.length % 2 != 0) {
             System.out.println("incorrect number of args!");
             System.exit(0);
         triangle = new int[args.length];
         for(int x = 0; x < args.length; x++) {
             triangle[x] = Integer.parseInt(args[x]);
         for(int i = 0; x < triangle.length; x++) {
             calc(triangle[x], triangle[x+1]);
             //System.out.println(x);
             x = x+1;
    public static void calc(int length, int height) {
         System.out.println("Length = " + length);
         System.out.println("Height = " + height);
         int area = (length * height) / 2;
         System.out.println ("The area of the triangle is " + area);