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The extends attribute specifies a superclass that the generated servlet must extend.For example, the following directive directs the JSP translator to generate the servlet such that the servlet extends somePackage.SomeClass −
The tag is used to parse the XML data specified either via an attribute or in the tag body.AttributeThe tag has the following attributes −AttributeDescriptionRequiredDefaultvarA variable that contains the parsed XML dataNoNonexmlText of the document to parse (String or Reader)NoBodysystemIdThe system identifier URI for parsing the documentNoNonefilterThe filter to be applied to the source documentNoNonedocXML document to be parsedNoPagescopeScope of the variable specified in the var attributeNoPagevarDomA variable that contains the parsed XML dataNoPagescopeDomScope of the variable specified in the varDom attributeNoPageExampleThe following example shows how parse can be used to read the external XML file −We have ... Read More
A LocalTime object can be obtained using the seconds of the day with the ofSecondOfDay() method in the LocalTime class in Java. This method requires a single parameter i.e. the seconds of the day and it returns the LocalTime object for the seconds of the day.A program that demonstrates this is given as followsExample Live Demoimport java.time.*; public class Demo { public static void main(String[] args) { long seconds = 18930; System.out.println("The seconds of the day: " + seconds); System.out.println("The LocalTime is: " + LocalTime.ofSecondOfDay(seconds)); } }outputThe seconds of the ... Read More
The set() method of the AbtstractSequentialList class is used to replace the element at the specified position in this list with the specified element. It returns the element which is replaced. The syntax is as follows −E set(int index, E element)Here, the index is the index of the element to replace. The ele is the element to be stored at the specified position.To work with the AbstractSequentialList class in Java, you need to import the following package −import java.util.AbstractSequentialList;The following is an example to implement AbstractSequentialList set() method in Java −Example Live Demoimport java.util.LinkedList; import java.util.AbstractSequentialList; public class Demo { ... Read More
To check whether a field exists or not in MongoDB, you can use the $exists operator.To understand the above concept, let us create a collection with the document. The query to create a collection with a document is as follows −> db.checkFieldExistsOrNotDemo.insertOne({"StudentName":"Larry"}); { "acknowledged" : true, "insertedId" : ObjectId("5c92ba4136de59bd9de063a1") } > db.checkFieldExistsOrNotDemo.insertOne({"StudentName":"John", "StudentAge":21}); { "acknowledged" : true, "insertedId" : ObjectId("5c92ba4e36de59bd9de063a2") } > db.checkFieldExistsOrNotDemo.insertOne({"StudentName":"Chris", "StudentAge":24, "StudentCountryName":"US"}); { "acknowledged" : true, "insertedId" : ObjectId("5c92ba6536de59bd9de063a3") } > db.checkFieldExistsOrNotDemo.insertOne({"StudentName":"Robert", "StudentAge":21, "StudentCountryName":"UK", "StudentHobby":["Teaching", "Photography"]}); { "acknowledged" : true, "insertedId" : ObjectId("5c92ba9d36de59bd9de063a4") }Display all documents from a collection ... Read More
This example demonstrate How to use firebase messaging in android applicationStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.Step 2 − Add the following code to src/MainActivity.java import android.os.Bundle; import android.support.v4.app.FragmentActivity; public class MainActivity extends FragmentActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } }Step 3 − Add the following code to src/ MyFirebaseMessagingService.java import android.app.Notification; import android.app.NotificationChannel; import android.app.NotificationManager; import android.content.Context; import android.graphics.Color; import android.os.Build; import android.support.v4.app.NotificationCompat; import android.support.v4.content.ContextCompat; import android.util.Log; ... Read More
You can use ORDER BY SUBSTRING() to order by certain part of a string in MySQL. Let us first create a table:mysql> create table DemoTable (UserId varchar(200)); Query OK, 0 rows affected (0.68 sec)Following is the query to insert records in the table using insert command:mysql> insert into DemoTable values('USER_1234'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('USER_John'); Query OK, 1 row affected (0.19 sec) mysql> insert into DemoTable values('USER_Sam'); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values('USER_Carol'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('USER_Bob'); Query OK, ... Read More
In this program we will see how to find the equivalent hexadecimal number from a BCD number.Problem StatementWrite 8086 Assembly language program to find the equivalent hexadecimal number from a BCD number. The number is stored at memory offset 500 and store the result at memory offset 600.DiscussionTo convert BCD to hexadecimal at first we have to cut the BCD digits. The most significant digit will be multiplied with 0AH (10D), and then least significant digit will be added with the result of multiplication. Thus the BCD will be converted to its equivalent hexadecimal form.InputAddressData……50059…… Flow Diagram ProgramOutputAddressData……6003B……
Before getting into example, we should know what sqlite data base in android is. SQLite is an open source SQL database that stores data to a text file on a device. Android comes in with built in SQLite database implementation. SQLite supports all the relational database features. In order to access this database, you don't need to establish any kind of connections for it like JDBC, ODBC etc.This example demonstrate about How to use IS NOT NULL in Android sqliteStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details ... Read More
Yes, you can use LIMIT 1 with SELECT1.Suppose, you are using SELECT 1 and your table has billions of records. In this case, it will print 1 billion times.The syntax of SELECT 1 is as follows −SELECT 1 FROM yourTableName;Suppose, you are using LIMIT 1 and your table has billions of records. This case, it will print 1 only once.The syntax of SELECT 1 with LIMIT 1 is as follows −SELECT 1 FROM yourTableName LIMIT 1;To understand the above syntax, let us create a table. The query to create a table is as follows −mysql> create table Select1AndLimit1Demo -> ... Read More