如何使用for循环填充年月列表？

Question

我如何循环年和月来显示下面的输出？显示期间的限制也是当月和年度，显示3年，包括截至日期的年度。意思是如果现在是2019年，那就展示2018年和2017年。

public class TestClass {
public static void main(String[] args) {
    Calendar today = Calendar.getInstance();
    //month=5, index starts from 0
    int month = today.get(Calendar.MONTH);
    //year=2019
    int year = today.get(Calendar.YEAR);

    for(int i = 0; i < 3; i++) {    //year
        for(int j= 0; j <= month; j++) {    //month
        System.out.println("Value of year: " + (year - 2)); //start from 2017 and iterate to 2 years ahead
        System.out.println("Value of month: " + (month + 1)); //start from January (index val: 1) and iterate to today's month
        }
    }
}

2019 1 201 9 2 201 9 3 201 9 4 201 9 5 201 9 6

Answer 1

尝试下面的代码。我使用的是Java8和java.time.LocalDate,

LocalDate currentDate = LocalDate.now();
int year = currentDate.getYear();
int month = currentDate.getMonthValue();

for (int i = year - 2; i <= year; i++) {
    for (int j = 1; j <= 12; j++) {
        if (i == year && j == month) {
            System.out.print(i + " " + j + " ");
            break;
        }
            System.out.print(i + " " + j + " ");
        }
    }
}

输出

2017 1 2017 2 2017 3 2017 4 2017 5 2017 6 2017 7 2017 8 2017 9 2017 10 2017 11 2017 12 2018 1 2018 2 2018 3 2018 4 2018 5 2018 6 2018 7 2018 8 2018 9 2018 10 2018 11 2018 12 2019 1 2019 2 2019 3 2019 4 2019 5 2019 6