java - 如何以日历格式打印数组中的值？

Question

所以我有两个月的数组来存储事件时间、日期和优先级，称为:

Events[] september= new Events[30];
Events[] october = new Events[31];

我想在其中插入我的日期数组并使它们以特定格式显示。

 static String[] days = {"1","2","3","4","5","6","7","8","9","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30"};

如何获得这样的输出？我似乎找不到解决办法:

Sun Mon Tue Wed Thu Fri Sat
     1   2*  3   4   5   6
 7   8   9  10  11* 12* 13
14* 15* 16* 17  18  19* 20
21  22  23  24  25* 26* 27
28* 29  30

我为它编写了两个不同的代码我的代码是:

public static void DisplayEvents(Events[] event,int firstWeekday) {
    System.out.println("Sun Mon Tue Wed Thu Fri Sat");
    for(int i =0; i<days.length;i++) {
        System.out.println(String.format("%1$5s", days[i]) +"");

    }

和

public static void DisplayEvents(Events[] event,int firstWeekday) {
    int weekDayIndex =0;

    System.out.println("Sun Mon Tue Wed Thu Fri Sat");
    for(int day=1; day<days.length; day++){
        System.out.println(" ");
        weekDayIndex++;
    }
    for(int day =1; day<event.length;day++){
        System.out.print(String.format("%1$5s", day));
        weekDayIndex++;
        if (weekDayIndex== 7){
            weekDayIndex = 0;
            System.out.println();
        } else {
            System.out.println("");
        }
    }

}

这些代码给我的输出是:

更新的输出:

Sun Mon Tue Wed Thu Fri Sat
1    2    3    4    5    6    7    8    9   10   11   12   13   14   15   16   17   18   19   20   21   22   23   24   25   26   27   28   29   30

星号表示举办 Activity 的日期。我已经编写了一段代码来放入随机事件，并且我有我的星号。我的问题只是以日历格式打印它，并能够将我的星号放在有事件的日子上。任何贡献/帮助将不胜感激。如果需要，我可以提供更多信息。

Answer 1

您可以打印标题。下一步打印出空格。

int currentWeekDay = 0;
for(int i = 0; i<firstWeekDay; i++){
    System.out.print("    ");
    currentWeekDay++;
    //just in case the firstWeekDay is invalid.
    if(currentWeekDay==7){
        currentWeekDay=0;
        System.out.println();
    }
}

现在打印出数字并每次添加硬回车。

for(int i = 0; i<event.length; i++){
    System.out.printf("%4s", event[i]);
    currentWeekDay++;
    if(currentWeekDay==7){
        currentWeekDay=0;
        System.out.println();
    }
}

请注意，我使用的是您创建的 days 字符串数组，而不是格式化您正在迭代的索引。