Ex14_1

public class Ex14
{
    private static final int DEFAULT_VAL = -1;

    public static int findMinDiff(int[] a, int x, int y)
    {
        int iX = DEFAULT_VAL;
        int iY = DEFAULT_VAL;
        int dist = DEFAULT_VAL;

        for(int i = 0; i < a.length; i++)
        {
            if(a[i] == x)
            {
                iX = i;
            }
            else if(a[i] == y)
            {
                iY = i;
            }

            if(iX != -1 && iY != -1)
            {
                dist = Math.abs(iX - iY);
            }
        }

        if(dist == DEFAULT_VAL)
        {
            return Integer.MAX_VALUE;
        }

        return dist;
    }
}