The hash code value of the LocalDateTime can be obtained using the hashCode() method in the LocalDateTime class in Java. This method requires no parameters and it returns the hash code value of the LocalDateTime.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; public class Demo { ... Read More

The current instance of the clock for the required zoneID can be obtained using the method system() in Clock Class in Java. This method requires a single parameter i.e. the zoneID or the time zone and it returns the current instance of the clock for that time zone.A program that ... Read More

To extract filenames from a path MySQL, you can use SUBSTRING_INDEX(). The syntax is as follows −SELECT SUBSTRING_INDEX(ypurColumnName, '\', -1) as anyAliasName FROM yourTableName;To understand the above syntax, let us create a table. The query to create a table is as follows −mysql> create table ExtractFileNameDemo -> ... Read More

A duplicate buffer of a buffer can be created using the method duplicate() in the class java.nio.ShortBuffer. This duplicate buffer is identical to the original buffer. The method duplicate() returns the duplicate buffer that was created.A program that demonstrates this is given as follows −Example Live Demoimport java.nio.*; import java.util.*; public ... Read More

To search a value in Unit class in JavaTuples, use the contains() method.Let us first see what we need to work with JavaTuples. To work with the Unit class in JavaTuples, you need to import the following package −import org.javatuples.Unit;Note − Steps to download and run JavaTuples program If you ... Read More

Let us get the timezone id strings for timezone America. For this, use the get.AvailableZoneIds() method −ZoneId.getAvailableZoneIds().stream().filter(s ->s.startsWith("America")) .forEach(System.out::println);With that, we have used the forEach to display all the timezones in America −America/Cuiaba America/Marigot America/El_Salvador America/Guatemala America/Belize America/Panama America/Managua America/Indiana/Petersburg America/Chicago America/Tegucigalpa America/Eirunepe America/Miquelon . . .Exampleimport java.time.ZoneId; public class ... Read More

A buffer can be compared with another buffer using the method compareTo() in the class java.nio.ShortBuffer. This method returns a negative integer if the buffer is less than the given buffer, zero if the buffer is equal to the given buffer and a positive integer if the buffer is greater ... Read More

A Pair class in JavaTuples can only have 2 elements. The JavaTuples library includes the Pair class.The following is the declaration −public final class Pair extends Tuple implements IValue0, IValue1Let us first see what we need to work with JavaTuples. To work with Pair class in JavaTuples, you need to ... Read More

You can achieve this with the help of CONCAT() along with REPLACE() function. To find the first occurrences you need to use INSTR() function.The syntax is as follows −UPDATE yourTableName SET UserPost = CONCAT(REPLACE(LEFT(yourColumnName, INSTR(yourColumnName, 'k')), 'k', 'i'), SUBSTRING(yourColumnName, INSTR(yourColumnName, 'k') + 1));To understand the above syntax, let us create ... Read More

Too return a specific field, use the find() method in MongoDB. Let us first create a collection with documents −> db.specificFieldDemo.insertOne({"FirstName":"John", "LastName":"Doe"}); {    "acknowledged" : true,    "insertedId" : ObjectId("5cb8019a623186894665ae31") } > db.specificFieldDemo.insertOne({"FirstName":"John", "LastName":"Smith"}); {    "acknowledged" : true,    "insertedId" : ObjectId("5cb801ab623186894665ae32") } > db.specificFieldDemo.insertOne({"FirstName":"David", "LastName":"Miller"}); {   ... Read More