Java 8 — Date and Time api (Joda api) | Code Factory

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Date and Time API Introduction (Joda Time API) :

Example 1 :

package com.codeFactory.datetime;import java.time.LocalDate;
import java.time.LocalTime;
public class Test {
public static void main(String... args) {
LocalDate date = LocalDate.now();
System.out.println(date);
LocalTime time = LocalTime.now();
System.out.println(time);
}
}

Output :

2020-05-08
13:30:49.580

Example 2 :

package com.codeFactory.datetime;import java.time.LocalDate;public class Test {
public static void main(String... args) {
LocalDate date = LocalDate.now();
System.out.println(date);
int dd = date.getDayOfMonth();
int mm = date.getMonthValue();
int yyyy = date.getYear();
System.out.format("%d-%d-%d", dd, mm, yyyy);
}
}

Output :

2020-05-08
8-5-2020

Example 3 :

package com.codeFactory.datetime;import java.time.LocalTime;public class Test {
public static void main(String... args) {
LocalTime time = LocalTime.now();
System.out.println(time);
int h = time.getHour();
int m = time.getMinute();
int s = time.getSecond();
int n = time.getNano();
System.out.format("%d:%d:%d:%d", h, m, s, n);
}
}

Output :

13:37:35.468
13:37:35:468000000

Example 4 :

package com.codeFactory.datetime;import java.time.LocalDateTime;public class Test {
public static void main(String... args) {
LocalDateTime dt = LocalDateTime.now();
System.out.println(dt);

int dd = dt.getDayOfMonth();
int mm = dt.getMonthValue();
int yyyy = dt.getYear();
System.out.format("%d-%d-%d", dd, mm, yyyy);
int h = dt.getHour();
int m = dt.getMinute();
int s = dt.getSecond();
int n = dt.getNano();
System.out.format("\n%d:%d:%d:%d", h, m, s, n);
}
}

Output :

2020-05-08T13:42:12.678
8-5-2020
13:42:12:678000000

Example 5 :

package com.codeFactory.datetime;import java.time.LocalDateTime;public class Test {
public static void main(String... args) {
/*LocalDateTime.of(YYYY, MM, DD, H, M, S, N)*/
LocalDateTime dt = LocalDateTime.of(2020, 5, 8, 13, 50, 40, 150);
System.out.println(dt);

System.out.println("After 5 months : " + dt.plusMonths(5));
System.out.println("Before 5 months : " + dt.minusMonths(5));
}
}

Output :

2020-05-08T13:50:40.000000150
After 5 months : 2020-10-08T13:50:40.000000150
Before 5 months : 2019-12-08T13:50:40.000000150

Date and Time API Introduction Period & Year :

Example 1 :

package com.codeFactory.datetime;import java.time.LocalDate;
import java.time.Period;
public class Test {
public static void main(String... args) {
LocalDate bDay = LocalDate.of(1991, 1, 9);
LocalDate today = LocalDate.now();
Period p = Period.between(bDay, today);
System.out.format("Age is %d Years %d Months %d Days.", p.getYears(), p.getMonths(), p.getDays());
}
}

Output :

Age is 29 Years 3 Months 29 Days.

Example 2 :

package com.codeFactory.datetime;import java.time.Year;public class Test {
public static void main(String... args) {
Year y = Year.of(1994);
if(y.isLeap()) {
System.out.println(y + " is leap year");
} else {
System.out.println(y + " is not leap year");
}
}
}

Output :

1994 is not leap year

Date and Time API Introduction ZoneId, ZonedDateTime :

package com.codeFactory.datetime;import java.time.ZoneId;
import java.time.ZonedDateTime;
public class Test {
public static void main(String... args) {
ZoneId zone = ZoneId.systemDefault();
System.out.println(zone);

ZoneId la = ZoneId.of("America/Los_Angeles");
ZonedDateTime zdt = ZonedDateTime.now(la);
System.out.println(zdt);
}
}

Output :

Asia/Calcutta
2020-05-08T02:37:03.966-07:00[America/Los_Angeles]