Programming Articles - Page 2721 of 3363

To fetch the key from a KeyValue tuple in Java, use the getKey() method. Let us first see what we need to work with JavaTuples. To work with KeyValue class in JavaTuples, you need to import the following package:import org.javatuples.KeyValue;Note: Download JavaTuples Jar library to run JavaTuples program. If you are using Eclipse IDE, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file. Refer the below guide for all the steps to run JavaTuples:Steps: How to run JavaTuples program in EclipseThe following is an example to fetch the ... Read More

In this article, we will understand how to sum the elements present inside a vector in C++. A vector is a dynamically allocated array with variable size. The sum of elements of a vector can be calculated in a number of ways, and we will discuss two such ways. Problem Statement Given a non-empty vector of integers, calculate the sum of all elements of the vector using multiple approaches in C++. Examples The following examples give the input and output of some test cases : Input vector vec={1, 3, 4, 5, 2, 3} Output ... Read More

The getRow() method of the ResultSet class returns the row number at which the ResultSet pointer exists in the current instance.Assume we have a table named cricketers_data with 6 records as shown below:+------------+------------+---------------+----------------+-------------+ | First_Name | Last_Name  | Date_Of_Birth | Place_Of_Birth | Country     | +------------+------------+---------------+----------------+-------------+ | Shikhar    | Dhawan     | 1981-12-05    | Delhi          | India       | | Jonathan   | Trott      | 1981-04-22    | CapeTown       | SouthAfrica | | Lumara     | Sangakkara | 1977-10-27    | Matale     ... Read More

To fetch the value from a KeyValue tuple in Java, use the getValue() method. Let us first see what we need to work with JavaTuples. To work with KeyValue class in JavaTuples, you need to import the following package:import org.javatuples.KeyValue;Note: Download JavaTuples Jar library to run JavaTuples program. If you are using Eclipse IDE, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file. Refer the below guide for all the steps to run JavaTuples:Steps: How to run JavaTuples program in EclipseThe following is an example to fetch the ... Read More

To create KeyValue tuple from List collection, use the fromCollection() method. Let us first see what we need to work with JavaTuples. To work with KeyValue class in JavaTuples, you need to import the following package:import org.javatuples.KeyValue;Note: Download JavaTuples Jar library to run JavaTuples program. If you are using Eclipse IDE, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file. Refer the below guide for all the steps to run JavaTuples:Steps: How to run JavaTuples program in EclipseThe following is an example to create KeyValue Tuple from List ... Read More

In C++, a vector is like a array which can be used accordingly. If you want to combine (append) two vectors, you need to add all the elements of one vector to the end of another. This is called appending a vector in a vector. To append a vector in a vector can simply be done by vector insert() method and moreover by using loops and std::move() to transfer elements. There are different ways to append one vector into another in C++. The most common ones are: Using insert() method Using ... Read More

The absolute() method of the ResultSet interface accepts an integer value representing the index of a row and moves the ResultSet pointer of the current ResultSet object to the specified position.Assume we have a table named cricketers_data with 6 records as shown below:+------------+------------+---------------+----------------+-------------+ | First_Name | Last_Name  | Date_Of_Birth | Place_Of_Birth | Country     | +------------+------------+---------------+----------------+-------------+ | Shikhar    | Dhawan     | 1981-12-05    | Delhi          | India       | | Jonathan   | Trott      | 1981-04-22    | CapeTown       | SouthAfrica | | Lumara   ... Read More

The average() method of the DoubleStream class in Java returns an OptionalDouble which is the arithmetic mean of elements of this stream. If the stream is empty, empty is returned.The syntax is as follows:OptionalDouble average()Here, OptionalDouble is a container object which may or may not contain a double value.To use the DoubleStream class in Java, import the following package:import java.util.stream.DoubleStream;First, create DoubleStream and add some elements:DoubleStream doubleStream = DoubleStream.of(50.8, 35.7, 49.5, 12.7, 89.7, 97.4);Get the average of the elements of the stream:OptionalDouble res = doubleStream.average();The following is an example to implement DoubleStream average() method in Java:Example Live Demoimport java.util.*; import java.util.stream.DoubleStream; ... Read More

To create Octet Tuple from an array in Java, use the fromArray() method. Let us first see what we need to work with JavaTuples. To work with Octet class in JavaTuples, you need to import the following package:import org.javatuples.Octet;Note: Download JavaTuples Jar library to run JavaTuples program. If you are using Eclipse IDE, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file. Refer the below guide for all the steps to run JavaTuples:Steps: How to run JavaTuples program in EclipseThe following is an example to create Octet Tuple ... Read More

The deleteRow() method of the ResultSet interface deletes the current row from the current ResultSet object.//Deleting a column from the ResultSet object rs.deleteRow();Assume we have a table named Cricketers_Data with 6 records as shown below:+----+------------+------------+---------------+----------------+-------------+ | ID | First_Name | Last_Name  | Year_Of_Birth | Place_Of_Birth | Country     | +----+------------+------------+---------------+----------------+-------------+ | 1  | Shikhar    | Dhawan     | 1981-12-05    | Delhi          | India | | 2  | Jonathan   | Trott      | 1981-04-22    | CapeTown       | SouthAfrica | | 3 ... Read More