Get a human readable String representing a period between 2 dates

CalculateDuration.java

private static String getStringDuration(Temporal startDate, Temporal endDate){
		Duration d = Duration.between(startDate, endDate);
		StringBuilder str = new StringBuilder();
		
		long total = d.getSeconds();
		long days = total / DAYS;
		if (days > 0) {
			str.append(days)
			   .append("d ");
			total -= days * DAYS;
		}
		
		long hours = total / HOURS;
		if (hours > 0) {
			str.append(hours)
			   .append("h ");
			total -= hours * HOURS;
		}
		
		long minutes = total / MINUTES;
		str.append(minutes)
		   .append("m");
		
		return str.toString();
	}