How To Compute Average True Range (ATR) using Java?

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public class ATRCalculator {
    
    public double calculateATR(double[] highs, double[] lows, double[] closes, int period) {
        double[] trueRanges = new double[highs.length];
        
        // Calculate True Range for each period
        for (int i = 1; i < highs.length; i++) {
            double trueRange = Math.max(highs[i] - lows[i], Math.max(Math.abs(highs[i] - closes[i - 1]), Math.abs(lows[i] - closes[i - 1])));
            trueRanges[i] = trueRange;
        }
        
        // Calculate Average True Range using Exponential Moving Average (EMA)
        double atr = 0;
        double multiplier = 2.0 / (period + 1);
        
        for (int i = 0; i < period; i++) {
            atr += trueRanges[i];
        }
        
        atr /= period;
        
        for (int i = period; i < highs.length; i++) {
            atr = ((trueRanges[i] - atr) * multiplier) + atr;
        }
        
        return atr;
    }
    
    public static void main(String[] args) {
        double[] highs = {10, 12, 14, 15, 16};
        double[] lows = {8, 10, 12, 13, 14};
        double[] closes = {9, 11, 13, 14, 15};
        
        ATRCalculator atrCalculator = new ATRCalculator();
        double atr = atrCalculator.calculateATR(highs, lows, closes, 3);
        
        System.out.println("Average True Range (ATR): " + atr);
    }
}