How to top Current Date as well as Time inwards Java alongside Example

You tin acquire today's engagement or electrical flow engagement together with fourth dimension inwards Java past times creating a new Date() object. H5N1 java.uti.Date object represents the electrical flow engagement together with fourth dimension instance inwards Java. Now, if yous desire to engagement inwards DDMMYYYY format or whatsoever other engagement format, yous tin easily convert the Date object to String past times using SimpleDateFormat class. Since Date instance contains both engagement together with time, if yous entirely postulate a engagement together with then yous tin farther convert the java.util.Date to java.sql.Date. Similarly, if yous postulate precisely fourth dimension together with then yous tin convert the java.util.Date to java.sql.Time, they stand upward for the engagement together with fourth dimension role of java.util.Date object inwards Java. You tin equally good exercise the java.util.Calendar shape to acquire the today's engagement together with time. Further, if yous are using Java 8 together with then yous tin exercise new Date together with Time API classes similar LocalDate, LocalTime, together with LocalDateTime to acquire the electrical flow date, time, together with date-time inwards Java.

Java e'er had issues with Date, Time, together with Timezone. There initial ii attempts inwards price of sometime engagement together with fourth dimension API from JDK 1 together with Calendar API from JDK 1.4 was plagued with thread-safety together with usability issues. Thankfully, they convey got it correct tertiary fourth dimension with novel Date together with Time API of Java 8. I strongly propose every Java developer acquire Java 8, specially novel Date together with Time API. Don't precisely acquire busy with lambdas together with stream. Unfortunately, not all Java 8 books comprehend this of import topic hence makes certain yous read Java SE 8 for Impatient past times Cay S. Horstmann to acquire this of import development.

s engagement or electrical flow engagement together with fourth dimension inwards Java past times creating a How to acquire Current Date together with Time inwards Java with Example

Java Program to acquire electrical flow engagement together with time

Here is our sample Java programme to impress the electrical flow engagement together with fourth dimension inwards Java. In this program, I convey demonstrated that java.util.Date instance represents both engagement together with time, together with if yous desire to extract engagement part, yous tin precisely convert the util engagement to java.sql.Date inwards Java.

Similarly, yous tin extract the fourth dimension role from the java.util.Date yous tin convert it to java.sql.Time class. An interesting matter to know is that both java.sql.Date together with java.sql.Time are subclasses of java.util.Date, but they don't follow Liskov Substitution principle. You cannot overstep java.sql.Date or java.sql.time, where a java.util.date instance is needed.

Since Date is nada but number of millisecond from epoch (1st Jan 1970, midnight GMT), it doesn't concur timezone information, but when yous impress date, it's toString() method is called which is overridden to impress the engagement inwards the local timezone. You tin convert Date to String past times using SimpleDateFormat equally good e.g. a engagement inwards DDMMYYY format.

package hello;  import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date;   public class JavaDatePrimer{  public static void main(String[] args) {  // electrical flow engagement together with fourth dimension inwards Java Date today = new Date(); System.out.println("current engagement together with time: " + today);  // displaying entirely electrical flow engagement inwards Java Date currentDate = new java.sql.Date(today.getTime()); System.out.println("current date: " + currentDate);  // displaying entirely electrical flow fourth dimension inwards Java Date currentTime = new java.sql.Time(today.getTime()); System.out.println("current time: " + currentTime);   // today's engagement inwards ddMMyyyy inwards Java DateFormat df = new SimpleDateFormat("ddMMyyyy"); String todayDate = df.format(today); System.out.println("Today's engagement inwards ddMMyyyy format: " + todayDate);  // today's engagement inwards mm/dd/yyyy format df = new SimpleDateFormat("MM/dd/yyyy"); todayDate = df.format(today); System.out.println("Today's engagement inwards MM/dd/yyyy format: " + todayDate); } }  Output electrical flow engagement and time: Monday February 15 18:21:44 SGT 2016 electrical flow date: 2016-02-15 electrical flow time: 18:21:44 Today's engagement inwards ddMMyyyy format: 15022016 Today's engagement in MM/dd/yyyy format: 02/15/2016

Important points to Remember about Date together with Time inwards Java

Use M for month, minor representative m is for minute
Use y for Year, uppercase representative Y is invalid
Be careful spell using SimpleDateFormat, it is non thread-safe together with should non locomote shared alongside multiple threads.
The java.util.Date instance doesn't hold timezone, but when yous impress the engagement object, it's toString() impress the engagement inwards your local timezone.
Prefer novel Date together with Time API from Java 8 if yous are lucky to locomote running inwards JDK 8.

That's all almost how to acquire the electrical flow engagement together with fourth dimension inwards Java. You tin equally good exercise the java.util.Calendar shape to acquire the electrical flow engagement together with fourth dimension inwards Java equally well. For farther reading on engagement together with time, yous tin read Core Java for Impatient, 1 of the best books to acquire heart together with individual Java.