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Daniel Reuter
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java.util.Date - examples
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‎src/test/java/de/codecentric/java8examples/timeapi/TimeApiTest.java‎

Lines changed: 80 additions & 13 deletions
Original file line numberDiff line numberDiff line change
@@ -4,14 +4,22 @@
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import static org.junit.Assert.assertFalse;
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import static org.junit.Assert.assertTrue;
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7+
import java.text.DateFormat;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.time.LocalDate;
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import java.time.LocalDateTime;
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import java.time.Month;
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import java.time.Period;
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import java.time.ZoneId;
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import java.time.ZonedDateTime;
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import java.time.chrono.ThaiBuddhistDate;
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import java.time.format.DateTimeFormatter;
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import java.time.temporal.ChronoField;
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import java.util.Calendar;
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import java.util.Date;
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import java.util.GregorianCalendar;
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import java.util.TimeZone;
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import org.joda.time.DateTime;
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import org.joda.time.DateTimeFieldType;
@@ -21,6 +29,8 @@
2129
import org.joda.time.format.DateTimeFormat;
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import org.junit.Test;
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32+
import sun.util.BuddhistCalendar;
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2434
/**
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* <a href="http://blog.joda.org/2009/11/why-jsr-310-isn-joda-time_4941.html">Why JSR-310 isn't Joda-Time</a><br/>
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* <a href="http://jug.ua/wp-content/uploads/2013/02/JODAjsr310.pdf">nice presentation (JUG Ukraine)</a><br/>
@@ -88,6 +98,14 @@ public void timeBetweenToDates() {
8898
System.out.println(betweenJoda.getYears() + " Years " + betweenJoda.getMonths() + " Months " + betweenJoda.getDays() + " Days.");
8999
assertEquals(32, betweenJoda.getYears());
90100
assertEquals(2, betweenJoda.getMonths());
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102+
// Date & Calendar
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Calendar birthdayCalendar = Calendar.getInstance();
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birthdayCalendar.set(1981, Calendar.SEPTEMBER, 3);
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int diffYears = Calendar.getInstance().get(Calendar.YEAR) - birthdayCalendar.get(Calendar.YEAR);
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int diffMonth = Calendar.getInstance().get(Calendar.MONTH) - birthdayCalendar.get(Calendar.MONTH);
107+
assertEquals(32, diffYears);
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assertEquals(2, diffMonth);
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}
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93111
@Test
@@ -102,11 +120,23 @@ public void checkDateIsInInterval() {
102120
Interval interval = new Interval(new DateTime(1981, 9, 3, 12, 0), DateTime.now());
103121
assertFalse(interval.contains(new DateTime(1980, 1, 1, 12, 0)));
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assertTrue(interval.contains(new DateTime(1985, 1, 1, 12, 0)));
123+
124+
// Date & Calendar
125+
Calendar birthdayCalendar = Calendar.getInstance();
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birthdayCalendar.set(1981, Calendar.SEPTEMBER, 3);
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Calendar nowCalendar = Calendar.getInstance();
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assertFalse(checkInterval(birthdayCalendar, nowCalendar, new GregorianCalendar(1980, 1, 1)));
129+
assertTrue(checkInterval(birthdayCalendar, nowCalendar, new GregorianCalendar(1985, 1, 1)));
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105131
}
106132

107133
private boolean checkInterval(LocalDate from, LocalDate to, LocalDate date) {
108134
return from.isBefore(date) && to.isAfter(date);
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}
136+
137+
private boolean checkInterval(Calendar from, Calendar to, Calendar date) {
138+
return date.getTime().after(from.getTime()) && date.getTime().before(to.getTime());
139+
}
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111141
@Test
112142
public void calculate5Years() {
@@ -123,65 +153,102 @@ public void calculate5Years() {
123153
assertEquals(birthdayPlusJoda.getDayOfMonth(), 3);
124154
assertEquals(birthdayPlusJoda.getMonthOfYear(), 9);
125155
assertEquals(birthdayPlusJoda.getYear(), 1991);
156+
157+
// Date & Calendar
158+
Calendar birthdayCalendar = Calendar.getInstance();
159+
birthdayCalendar.set(1981, Calendar.SEPTEMBER, 3);
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birthdayCalendar.add(Calendar.YEAR,10);
161+
assertEquals(birthdayCalendar.get(Calendar.DAY_OF_MONTH), 3);
162+
// !! 0-based
163+
assertEquals(birthdayCalendar.get(Calendar.MONTH), Calendar.SEPTEMBER);
164+
assertEquals(birthdayCalendar.get(Calendar.YEAR), 1991);
126165
}
127166

128167
@Test
129168
public void chronologies() {
130169
// JSR-310
131170
ThaiBuddhistDate thaiBuddhistDate = ThaiBuddhistDate.now();
132-
System.out.println(thaiBuddhistDate.getChronology());
133171
int thaiYear = thaiBuddhistDate.get(ChronoField.YEAR);
134172
LocalDate isoDate = LocalDate.now();
135-
System.out.println(isoDate.getChronology());
136173
int isoYear = isoDate.get(ChronoField.YEAR);
137-
138174
assertEquals(thaiYear, isoYear + 543);
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140176
// Joda
141177
org.joda.time.LocalDate buddhistDateJoda = new org.joda.time.LocalDate(BuddhistChronology.getInstance());
142178
int buddhistYearJoda = buddhistDateJoda.get(DateTimeFieldType.year());
143179
org.joda.time.LocalDate dateJoda = new org.joda.time.LocalDate();
144180
int yearJoda = dateJoda.get(DateTimeFieldType.year());
145-
146181
assertEquals(buddhistYearJoda, yearJoda + 543);
182+
183+
// Date & Calendar
184+
BuddhistCalendar buddhistCalendar = new BuddhistCalendar();
185+
int buddhistYearCalendar = buddhistCalendar.get(BuddhistCalendar.YEAR);
186+
Calendar calendar = Calendar.getInstance();
187+
int yearCalendar = calendar.get(Calendar.YEAR);
188+
assertEquals(buddhistYearCalendar, yearCalendar + 543);
147189
}
190+
148191

149192
@Test
150-
public void timezoneAndOffset() {
193+
public void timezoneAndOffset() throws InterruptedException {
151194
// JSR-310
152-
ZonedDateTime zonedDateTimeEurope = ZonedDateTime.now();
153-
ZonedDateTime zonedDateTimeUTC = ZonedDateTime.now(ZoneId.of("UTC"));
195+
LocalDateTime dateTime = LocalDateTime.now();
196+
ZonedDateTime zonedDateTimeEurope = ZonedDateTime.of(dateTime, ZoneId.systemDefault());
197+
ZonedDateTime zonedDateTimeUTC = ZonedDateTime.of(dateTime, ZoneId.of("UTC"));
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155199
assertEquals(60 * 60 * 1, zonedDateTimeEurope.getOffset().getTotalSeconds());
156200
assertEquals("Europe/Berlin", zonedDateTimeEurope.getZone().getId());
157-
assertFalse(zonedDateTimeEurope.isBefore(zonedDateTimeUTC));
201+
//!!
202+
assertTrue(zonedDateTimeEurope.isBefore(zonedDateTimeUTC));
158203
assertFalse(zonedDateTimeEurope.isAfter(zonedDateTimeUTC));
159-
assertTrue(zonedDateTimeEurope.isEqual(zonedDateTimeUTC));
204+
assertFalse(zonedDateTimeEurope.isEqual(zonedDateTimeUTC));
160205

161206
// Joda
162-
DateTime dateTimeEuropeJoda = DateTime.now();
163-
DateTime dateTimeUTCJoda = DateTime.now(DateTimeZone.UTC);
207+
Date date = new Date();
208+
DateTime dateTimeEuropeJoda = new DateTime(date.getTime(),DateTimeZone.getDefault());
209+
DateTime dateTimeUTCJoda = new DateTime(date.getTime(),DateTimeZone.UTC);
164210

165211
assertEquals(60 * 60 * 1 * 1000, dateTimeEuropeJoda.getZone().getOffset(dateTimeEuropeJoda.getMillis()));
166212
assertEquals("Europe/Berlin", dateTimeEuropeJoda.getZone().getID());
213+
//!!
167214
assertFalse(dateTimeEuropeJoda.isBefore(dateTimeUTCJoda));
168215
assertFalse(dateTimeEuropeJoda.isAfter(dateTimeUTCJoda));
169216
assertTrue(dateTimeEuropeJoda.isEqual(dateTimeUTCJoda));
217+
218+
// Date & Calendar
219+
Calendar calendarEurope = Calendar.getInstance();
220+
calendarEurope.setTime(date);
221+
Calendar calendarUTC = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
222+
calendarEurope.setTime(date);
223+
assertFalse(calendarEurope.getTime().before(calendarUTC.getTime()));
224+
assertFalse(calendarEurope.getTime().after(calendarUTC.getTime()));
225+
assertTrue(calendarEurope.getTime().equals(calendarUTC.getTime()));
170226
}
171227

172228
@Test
173229
public void parsingAndFormatting() {
174230
// JSR-310
175231
DateTimeFormatter fmt = DateTimeFormatter.ofPattern("dd.MM.yyyy");
176-
LocalDate parsedDate = LocalDate.parse("03.09.1981", fmt);
177-
assertEquals(LocalDate.of(1981, 9, 3), parsedDate);
232+
LocalDate parsedLocalDate = LocalDate.parse("03.09.1981", fmt);
233+
assertEquals(LocalDate.of(1981, 9, 3), parsedLocalDate);
178234
assertEquals("03.09.1981", fmt.format(LocalDate.of(1981, 9, 3)));
179235

180236
// Joda
181237
org.joda.time.format.DateTimeFormatter fmtJoda = DateTimeFormat.forPattern("dd.MM.yyyy");
182238
org.joda.time.LocalDate parsedDateJoda = org.joda.time.LocalDate.parse("03.09.1981", fmtJoda);
183239
assertEquals(new org.joda.time.LocalDate(1981, 9, 3), parsedDateJoda);
184240
assertEquals("03.09.1981", fmtJoda.print(new org.joda.time.LocalDate(1981, 9, 3)));
241+
242+
// Date & Calendar
243+
DateFormat dateFormat = new SimpleDateFormat("dd.MM.yyyy");
244+
Date parsedDate = null;
245+
try {
246+
parsedDate= dateFormat.parse("03.09.1981");
247+
} catch (ParseException e) {
248+
// handle
249+
}
250+
assertEquals(new GregorianCalendar(1981, Calendar.SEPTEMBER,3).getTime(), parsedDate);
251+
assertEquals("03.09.1981", dateFormat.format(new GregorianCalendar(1981, Calendar.SEPTEMBER,3).getTime()));
185252
}
186253

187254
}

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