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To search a value in JavaTuples Quartet class, you need to use the contains() method.Let us first see what we need to work with JavaTuples. To work with Quartet class in JavaTuples, you need to import the following package −import org.javatuples.Quartet;Note − Steps to download and run JavaTuples program. If you are using Eclipse IDE to run Quartet Class in JavaTuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The following is an example −Exampleimport org.javatuples.Quartet; public class Demo { public static void main(String[] args) ... Read More
A JSP life cycle is defined as the process from its creation till the destruction. This is similar to a servlet life cycle with an additional step which is required to compile a JSP into servlet.Paths Followed By JSPThe following are the paths followed by a JSP −CompilationInitializationExecutionCleanupThe four major phases of a JSP life cycle are very similar to the Servlet Life Cycle. The four phases have been described below −JSP CompilationWhen a browser asks for a JSP, the JSP engine first checks to see whether it needs to compile the page. If the page has never been compiled, ... Read More
The tag formats a URL into a string and stores it into a variable. This tag automatically performs URL rewriting when necessary. The var attribute specifies the variable that will contain the formatted URL.The JSTL url tag is just an alternative method of writing the call to the response.encodeURL() method. The only real advantage the url tag provides is proper URL encoding, including any parameters specified by children param tag.AttributeThe tag has the following attributes −AttributeDescriptionRequiredDefaultValueBase URLYesNonecontext/ followed by the name of a local web applicationNoCurrent applicationvarName of the variable to expose the processed URLNoPrint to pagescopeScope of ... Read More
An immutable copy of a LocalDate with the month altered as required is done using the method withMonth() in the LocalDate class in Java. This method requires a single parameter i.e. the month that is to be set in the LocalDate and it returns the LocalDate with the month altered as required.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; public class Main { public static void main(String[] args) { LocalDate ld1 = LocalDate.parse("2019-02-15"); System.out.println("The LocalDate is: " + ld1); ... Read More
The boxed() method of the IntStream class returns a Stream consisting of the elements of this stream, each boxed to an Integer.The syntax is as follows.Stream boxed()At first, create an IntStreamIntStream intStream = IntStream.range(20, 30);Now, use the boxed() method to return a Stream consisting of the elements of this stream, each boxed to an Integer.Stream s = intStream.boxed();The following is an example to implement IntStream boxed() method in Java.Example Live Demoimport java.util.*; import java.util.stream.Stream; import java.util.stream.IntStream; public class Demo { public static void main(String[] args) { IntStream intStream = IntStream.range(20, 30); Stream s = ... Read More
To get the storage size of a database in MongoDB, use the stats() method.At first, check the current database with the help of the following query −> db;The following is the output −testHere is the query to get the storage size of the database in MongoDB −> db.stats()The following is the output displaying the stats including the storage size −The following is the output −{ "db" : "test", "collections" : 114, "views" : 0, "objects" : 391, "avgObjSize" : 83.0076726342711, "dataSize" : 32456, "storageSize" : 3211264, "numExtents" : 0, "indexes" : 120, "indexSize" : 2494464, "fsUsedSize" : 126172377088, "fsTotalSize" : 199229435904, "ok" : 1 }
To add a new MySQL table column and index, you can use ALTER TABLE command.The syntax is as followsALTER TABLE yourTableName ADD COLUMN yourColumnName dataType, ADD INDEX(yourColumnName );To understand the above syntax, let us create a table. The query to create a table is as followsmysql> create table AddColumnAndIndexDemo -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(100), -> Address varchar(200) -> ); Query OK, 0 rows affected (0.81 sec)Now you can check the description of table. The query is as follows −mysql> desc AddColumnAndIndexDemo;The following is the output+---------+--------------+------+-----+---------+----------------+ | Field ... Read More
To concatenate strings from two fields into a third field, you can use the following syntaxdb.yourCollectionName.aggregate( [ { $project: { "yourNewFieldName": { $concat: [ "$yourFieldName1", " yourDellimiterValue ", "$yourFieldName2" ] } } } ] );Let us first create a collection with documents>db.concatenateStringsDemo.insertOne({"StudentFirstName":"John", "StudentLastName":"Doe"}); { "acknowledged" : true, "insertedId" : ObjectId("5c9bb7362d66697741252444") } >db.concatenateStringsDemo.insertOne({"StudentFirstName":"John", "StudentLastName":"Smith"}); { "acknowledged" : true, "insertedId" : ObjectId("5c9bb7402d66697741252445") } >db.concatenateStringsDemo.insertOne({"StudentFirstName":"Carol", "StudentLastName":"Taylor"}); { "acknowledged" : true, "insertedId" : ObjectId("5c9bb74c2d66697741252446") } >db.concatenateStringsDemo.insertOne({"StudentFirstName":"David", "StudentLastName":"Miller"}); { "acknowledged" : true, "insertedId" : ObjectId("5c9bb7752d66697741252447") } >db.concatenateStringsDemo.insertOne({"StudentFirstName":"James", "StudentLastName":"Williams"}); { "acknowledged" : ... Read More
To output fixed number of array elements in a line, we should check for a condition and if that is true, we should place System.out.println(); properly to get a line and the process goes on.Here, we will display 5 elements in a line. At first, create a new integer array and add some elements −int[] list = new int[50]; for (int i = 0; i < list.length; i++) { list[i] = (int)(i + 20); }Now, declare a new variable and initialize it to 0. This variable is checked in a for loop that loops until the length of the ... Read More
Yes, let us first see the working of ternary operator in C or C++ language.X=(X > 10 && ( X-Y) < 0) ?: X:(X-Y);Here is the demo code in C language. After that we will check in MySQL. The C code is as follows −#include int main() { int X; int Y; int result; printf("Enter the value for X:"); scanf("%d", &X); printf("Enter the value for Y:"); scanf("%d", &Y); result=( X > 1 && (X-Y) < 0) ? X: (X-Y); printf("The Result is=%d", result); return 0; }The snapshot of C ... Read More