public Double calcTax(double income, double[][] taxBracket)
{
    double tax = 0.0;
    double lowerBracket = 0.0;
    double upperBracket = 0.0;
    for(int i = 0; i < taxBracket.length; i++)
    {
        lowerBracket = taxBracket[i][0];
        if(i+1 < taxBracket.length)
        {
            upperBracket = taxBracket[i+1][0];
            if(income >=lowerBracket && (income - lowerBracket) <= upperBracket)
            {
                tax += lowerBracket * taxBracket[i][1];
            }
            else if((income - lowerBracket)>= upperBracket)
            {
                tax += (income - lowerBracket) * taxBracket[i][1];
            }
        }
        else
        {
            tax += (income - lowerBracket) * taxBracket[i][1];
        }
    }
}