这是Date类的一个小的案例
下边直接上代码:

可视化日历.png

按照格式输入年月日,会出现对应的日历,并且当前日期会有*标注

// 可视化日历
public class Test02 {

    
    public static void main(String[] args) {
        
        System.out.println("请输入日期-按照格式:2012-2-12");
        
        Scanner scanner = new Scanner(System.in);
        String temp = scanner.nextLine();
        
        DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        //异常捕获
        try {
            Date date = format.parse(temp);
            Calendar calendar = new GregorianCalendar();
            calendar.setTime(date);
            //获得老的天数(也就是我们传进来的当天的天数)
            int day = calendar.get(Calendar.DATE);
            //日期从一号开始
            calendar.set(Calendar.DATE, 1);
            //获取是周几
            //System.out.println(calendar.get(Calendar.DAY_OF_WEEK));
            int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
            //获取一个月最大的天数
            //System.out.println(calendar.getActualMaximum(Calendar.DATE));
            int maxDate = calendar.getActualMaximum(Calendar.DATE);
            System.out.println("日\t一\t二\t三\t四\t五\t六");
            
            for (int i = 1; i < dayOfWeek; i++) {
                System.out.print('\t');
            }
            
            //计数器
//          int j = 0;
            for (int i = 1; i < maxDate; i++) {
                if (i == day) {
                    System.out.print("*");
                }
                System.out.print(i+"\t");
                
                int w = calendar.get(Calendar.DAY_OF_WEEK);
                if (w == Calendar.SATURDAY) {
                    System.out.println();
                }
                
                calendar.add(Calendar.DATE, 1);
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }
    }
}