How To Compute Relative Strength Index (RSI) using Java?

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public static double calculateRSI(double[] prices, int period) {
    double sumGain = 0;
    double sumLoss = 0;
    
    for (int i = 1; i < period; i++) {
        double priceDiff = prices[i] - prices[i - 1];
        if (priceDiff > 0) {
            sumGain += priceDiff;
        } else {
            sumLoss -= priceDiff;
        }
    }
    
    double avgGain = sumGain / period;
    double avgLoss = sumLoss / period;
    
    double rs = avgGain / avgLoss;
    double rsi = 100 - (100 / (1 + rs));
    
    return rsi;
}

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double[] prices = {50.0, 55.0, 60.0, 65.0, 70.0, 75.0, 80.0, 85.0, 90.0, 95.0};
int period = 14;

double rsi = calculateRSI(prices, period);
System.out.println("RSI: " + rsi);