筆記-java-獲取某年某月的最后一天

public class LastDayOfMonth 
{
    /**
     * 獲取某月的最后一天
     * 
     */
    public static String getLastDayOfMonth(int year,int month)
    {
        Calendar cal = Calendar.getInstance();
        //設置年份
        cal.set(Calendar.YEAR,year);
        //設置月份
        cal.set(Calendar.MONTH, month-1);
        //獲取某月最大天數
        int lastDay = cal.getActualMaximum(Calendar.DAY_OF_MONTH);
        //設置日歷中月份的最大天數
        cal.set(Calendar.DAY_OF_MONTH, lastDay);
        //格式化日期
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        String lastDayOfMonth = sdf.format(cal.getTime());
         
        return lastDayOfMonth;
    }
 
    /**
     *    main
     */
    public static void main(String[] args) 
    {
        String lastDay = getLastDayOfMonth(2014,5);
        System.out.println("獲取當前月的最后一天：" + lastDay);
    }
 
}