public static void main(String[] args) {
String str1 = "hello";
String str2 = new String("hello");
System.out.println(str1.equals(str2));
System.out.println(str1.intern() == str2.intern());
Date now = new Date();
Calendar calendar = Calendar.getInstance();
System.out.println(calendar.getMinimalDaysInFirstWeek());
// calendar.setFirstDayOfWeek(Calendar.MONDAY);
calendar.setTime(now);
calendar.add(Calendar.DATE, 144);
System.out.println(calendar.getTime());
String burepayDay = new SimpleDateFormat("YYYYÄêMMÔÂddÈÕ").format(calendar.getTime());
System.out.println(calendar.getTime().toLocaleString());
System.out.println(burepayDay);
System.out.println(calendar.getWeeksInWeekYear());
String str = "hjjk";
System.out.println(str.substring(0, 4));
}
