Example: Days - Beginning of Period to Settlement Date

import com.imsl.finance.*;
import java.text.*;
import java.util.*;

public class coupdaybsEx1 {
    static final DateFormat dateFormat =
    DateFormat.getDateInstance(DateFormat.SHORT,  Locale.US);
    
    static private GregorianCalendar parse(String s) throws ParseException {
        GregorianCalendar cal = new GregorianCalendar();
        cal.setTime(dateFormat.parse(s));
        return cal;
    }
    
    public static void main(String args[]) throws ParseException {
        GregorianCalendar settlement = parse("11/11/86");
        GregorianCalendar maturity = parse("3/1/99");
        int freq = Bond.SEMIANNUAL;
        DayCountBasis dcb = DayCountBasis.BasisActual365;
        int coupdaybs = Bond.coupdaybs(settlement, maturity, freq, dcb);
        System.out.println("The number of days from the beginning of the" +
        "\ncoupon period to the settlement date is " + coupdaybs);
    }
}

Output

The number of days from the beginning of the
coupon period to the settlement date is 71