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To create Unit Tuple from another collection, use the fromCollection() 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 are using Eclipse IDE to run Unit Class in Java Tuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The following is an example −Exampleimport java.util.*; import org.javatuples.Unit; public class Demo { public static void main(String[] args) { ... Read More
The action can be used to write the template text in JSP pages and documents. Following is the simple syntax for this action −Template dataThe body of the template cannot contain other elements; it can only contain text and EL expressions (Note − EL expressions are explained in a subsequent chapter). Note that in XML files, you cannot use expressions such as ${whatever > 0}, because the greater than signs are illegal. Instead, use the gt form, such as ${whatever gt 0} or an alternative is to embed the value in a CDATA section.]]>If you need to include a ... Read More
The listIterator() method of the AbstractSequentialList class returns a list iterator over the elements in this list.The syntax is as followspublic abstract ListIterator listIterator(int index)Here, index is the index of the first element to be returned from the list iterator. The ListIterator here is the iterator for lists.To work with the AbstractSequentialList class in Java, you need to import the following packageimport java.util.AbstractSequentialList;The following is an example to implement AbstractSequentialList listIterator() method in JavaExample Live Demoimport java.util.LinkedList; import java.util.ListIterator; import java.util.AbstractSequentialList; public class Demo { public static void main(String[] args) { AbstractSequentialList absSequential = ... Read More
To add value in Ennead class in JavaTuples, you need to use the addAtX() method. Here, X represents the index wherein you need to add the value i.e. for index 2, use addAt2() method. Add the specific value as the parameter value of the method. For example −addAt2(“John”);Let us first see what we need to work with JavaTuples. To work with Ennead class in JavaTuples, you need to import the following package −import org.javatuples.Ennead;Note − Download JavaTuples Jar library to run JavaTuples program. If you are using Eclipse IDE, then Right Click Project -> Properties -> Java Build Path -> ... Read More
Use $in operator to query an array of arrays in MongoDB. To understand the concept, let us create a collection with the document. The query to create a collection with a document is as follows −> db.arrayOfArraysDemo.insertOne({"EmployeeName":"Larry", "EmployeeSkills":[["Java", "MongoDB", "MySQL", "SQL Server"]]}); { "acknowledged" : true, "insertedId" : ObjectId("5c7f7a8d8d10a061296a3c5b") } > db.arrayOfArraysDemo.insertOne({"EmployeeName":"Mike", "EmployeeSkills":[["C", "C++"]]}); { "acknowledged" : true, "insertedId" : ObjectId("5c7f7aa68d10a061296a3c5c") }Display all documents from a collection with the help of find() method. The query is as follows −> db.arrayOfArraysDemo.find().pretty();The following is the output −{ "_id" : ObjectId("5c7f7a8d8d10a061296a3c5b"), "EmployeeName" : "Larry", "EmployeeSkills" : ... Read More
The hashCode() method of AbstractList class returns the hash code value for this list.The syntax is as follows:public int hashCode()To work with the AbstractList class, import the following package:import java.util.AbstractList;The following is an example to implement hashCode() method of the AbstractlList class in Java:Example Live Demoimport java.util.ArrayList; import java.util.AbstractList; public class Demo { public static void main(String[] args) { AbstractList myList = new ArrayList(); myList.add(50); myList.add(100); myList.add(150); myList.add(200); myList.add(250); myList.add(300); myList.add(350); myList.add(400); ... Read More
To insert a document with date in MongoDB, use Date(). Following is the syntax“yourFieldName”:new Date(yourDateValue);Let us create a collection with documents. Following is the query>db.insertDocumentWithDateDemo.insertOne({"UserName":"Larry", "UserMessage":"Hi", "UserMessagePostDate":new Date("2012-09-24")}); { "acknowledged" : true, "insertedId" : ObjectId("5c9cca58a629b87623db1b16") } >db.insertDocumentWithDateDemo.insertOne({"UserName":"Chris", "UserMessage":"Hello", "UserMessagePostDate":new Date("2015-12-31")}); { "acknowledged" : true, "insertedId" : ObjectId("5c9cca71a629b87623db1b17") } >db.insertDocumentWithDateDemo.insertOne({"UserName":"Robert", "UserMessage":"Bye", "UserMessagePostDate":new Date("2019-01-01")}); { "acknowledged" : true, "insertedId" : ObjectId("5c9cca85a629b87623db1b18") }Following is the query to display all documents from a collection with the help of find() method> db.insertDocumentWithDateDemo.find().pretty();This will produce the following output{ "_id" : ObjectId("5c9cca58a629b87623db1b16"), "UserName" : "Larry", "UserMessage" : "Hi", ... Read More
You can use subquery with aggregate COUNT(*) to get the total row count. Let us first create a table −mysql> create table DemoTable ( StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, StudentFirstName varchar(20), StudentAge int ); Query OK, 0 rows affected (0.48 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(StudentFirstName, StudentAge) values('John', 23); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(StudentFirstName, StudentAge) values('Larry', 21); Query OK, 1 row affected (0.40 sec) mysql> insert into DemoTable(StudentFirstName, StudentAge) values('Johnny', 23); Query OK, 1 row affected (0.43 sec) mysql> insert into DemoTable(StudentFirstName, StudentAge) ... Read More
Let us first create a List:List emp = Arrays.asList( new Employee("John", "Marketing", 5), new Employee("David", "Operations", 10));We have class Employee with name, department and rank of employees.Now, create summary for the rank like count, average, sum, etc:IntSummaryStatistics summary = emp .stream() .collect(Collectors.summarizingInt(p -> p.rank));The following is an example to create IntSummaryStatistics from Collectors in Java:Exampleimport java.util.Arrays; import java.util.IntSummaryStatistics; import java.util.List; import java.util.stream.Collectors; public class Demo { public static void main(String[] args) throws Exception { List emp = Arrays.asList(new Employee("John", "Marketing", 5), new Employee("David", "Operations", 10)); IntSummaryStatistics summary = emp .stream() .collect(Collectors.summarizingInt(p → ... Read More
These instructions are used to control the processor action by setting/resetting the flag values.These are the process/processor control instructions.OpcodeOperandDescriptionSTC----Used to set carry flag CY to 1CLC----Used to clear/reset carry flag CY to 0CMC----Used to put complement at the state of carry flag CY.STD----Used to set the direction flag DF to 1CLD----Used to clear/reset the direction flag DF to 0STI----Used to set the interrupt enable flag to 1, i.e., enable INTR input.CLI----Used to clear the interrupt enable flag to 0, i.e., disable INTR input.