这是带有描述步骤的注释的粗略版本：
// create a Calendar for the 1st of the required monthint year = 2010;int month = Calendar.JANUARY;Calendar cal = new GregorianCalendar(year, month, 1);do { // get the day of the week for the current day int day = cal.get(Calendar.DAY_OF_WEEK); // check if it is a Saturday or Sunday if (day == Calendar.SATURDAY || day == Calendar.SUNDAY) { // print the day - but you could add them to a list or whatever System.out.println(cal.get(Calendar.DAY_OF_MONTH)); } // advance to the next day cal.add(Calendar.DAY_OF_YEAR, 1);} while (cal.get(Calendar.MONTH) == month);// stop when we reach the start of the next month
