Bollinger Bands Using Talib

I am trying to implement a simple BBands application using the Taliban.

I have no experience in the Taliban and technical indicators.

Can anyone take a look at whether this is a good implementation of the Bollinger Bands with Talib and gives me tips on how to improve it. If anyone has experience with Talib and Bollinger, it would be very helpful to give me a hand. Here is the code.

import com.tictactec.ta.lib.Core;
import com.tictactec.ta.lib.MInteger;
import com.tictactec.ta.lib.RetCode;
import com.tictactec.ta.lib.*;
import com.tictactec.ta.lib.meta.helpers.*;

public class ExampleTALib 
{

  /**
   * The total number of periods to generate data for.
   */
  public static final int TOTAL_PERIODS = 100;

  /**
    * The number of periods to average together.
    */
  public static final int PERIODS_AVERAGE = 20;

    public static void main(String[] args) 
    {
      double[] closePrice = new double[TOTAL_PERIODS];
      double[] out = new double[TOTAL_PERIODS];
      MInteger begin = new MInteger();
      MInteger length = new MInteger();

      double[] outRealUpperBand = new double[TOTAL_PERIODS];
      double[] outRealMiddleBand = new double[TOTAL_PERIODS];
      double[] outRealLowerBand = new double[TOTAL_PERIODS];




      for (int i = 0; i < closePrice.length; i++) {
        closePrice[i] = (double) i;
      }

      Core c = new Core();
//      RetCode retCode = c.sma(0, closePrice.length - 1, closePrice, PERIODS_AVERAGE, begin, length, out);
//      RetCode re = c.sma(startIdx, endIdx, inReal, optInTimePeriod, outBegIdx, outNBElement, outReal)
      RetCode retCode = c.bbands(0, closePrice.length - 1, closePrice, PERIODS_AVERAGE,
              1.0, 3.0, MAType.Ema, begin, length, outRealUpperBand, outRealMiddleBand, outRealLowerBand);
//      RetCode re = c.bbands(startIdx, endIdx, inReal, optInTimePeriod, optInNbDevUp, optInNbDevDn, optInMAType, outBegIdx, outNBElement, outRealUpperBand, outRealMiddleBand, outRealLowerBand)


      if (retCode == RetCode.Success) {
        System.out.println("Output Begin:" + begin.value);
        System.out.println("Output Begin:" + length.value);

        for (int i = begin.value; i < closePrice.length; i++) {
            StringBuilder line = new StringBuilder();
            line.append("Period #");
            line.append(i+1);
            line.append(" close= ");
            line.append(closePrice[i]);
            line.append(" mov avg=");
            line.append(out[i-begin.value]);
            System.out.println(line.toString());
            }
    }
    else {
      System.out.println("Error");
    }
  }
}