Java獲取兩個指定日期之間的所有月份

public static void main(String[] args) {
    String y1 = "2016-02";// 開始時間
    String y2 = "2019-12";// 結束時間

    try {
        Date startDate = new SimpleDateFormat("yyyy-MM").parse(y1);
        Date endDate = new SimpleDateFormat("yyyy-MM").parse(y2);

        Calendar calendar = Calendar.getInstance();
        calendar.setTime(startDate);
        // 獲取開始年份和開始月份
        int startYear = calendar.get(Calendar.YEAR);
        int startMonth = calendar.get(Calendar.MONTH);
        // 獲取結束年份和結束月份
        calendar.setTime(endDate);
        int endYear = calendar.get(Calendar.YEAR);
        int endMonth = calendar.get(Calendar.MONTH);
        //
        List<String> list = new ArrayList<String>();
        for (int i = startYear; i <= endYear; i++) {
            String date = "";
            if (startYear == endYear) {
                for (int j = startMonth; j <= endMonth; j++) {
                    if (j < 9) {
                        date = i + "-0" + (j + 1);
                    } else {
                        date = i + "-" + (j + 1);
                    }
                    list.add(date);
                }

            } else {
                if (i == startYear) {
                    for (int j = startMonth; j < 12; j++) {
                        if (j < 9) {
                            date = i + "-0" + (j + 1);
                        } else {
                            date = i + "-" + (j + 1);
                        }
                        list.add(date);
                    }
                } else if (i == endYear) {
                    for (int j = 0; j <= endMonth; j++) {
                        if (j < 9) {
                            date = i + "-0" + (j + 1);
                        } else {
                            date = i + "-" + (j + 1);
                        }
                        list.add(date);
                    }
                } else {
                    for (int j = 0; j < 12; j++) {
                        if (j < 9) {
                            date = i + "-0" + (j + 1);
                        } else {
                            date = i + "-" + (j + 1);
                        }
                        list.add(date);
                    }
                }

            }

        }

        // 所有的月份已經准備好
        //System.out.println(list);
        for(int i = 0;i < list.size();i++){
            System.out.println(list.get(i));
        }

    } catch (Exception e) {
        e.printStackTrace();
    }
}