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This example demonstrate about How to Show android notification every five minutesStep 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 res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivitypackage app.tutorialspoint.com.notifyme ; import android.content.Intent ; import android.os.Bundle ; import android.support.v7.app.AppCompatActivity ; import android.view.View ; public class MainActivity extends AppCompatActivity { @Override protected void onCreate (Bundle savedInstanceState) { super .onCreate(savedInstanceState) ; setContentView(R.layout. activity_main ) ; } @Override protected void onStop () { super .onStop() ; startService( new Intent( this, NotificationService. class )) ; } public void closeApp (View view) { finish() ; } }Step ... Read More
To rename a user, you need to use update() and $set to set the new username. Following is the syntax −db.system.users.update({"user":"yourOldUserName"}, {$set:{"user":"yourNewUserName"}});Firstly, display all the users from the MongoDB database −> use admin; switched to db admin > db.getUsers();This will produce the following output −[ { "_id" : "admin.Chris", "user" : "Chris", "db" : "admin", "roles" : [ { "role" : "readWrite", "db" : "test" } ... Read More
Reference-counting garbage collectionThis is the simplest garbage collection algorithm.This algorithm looks out for those objects which have no references left.An object becomes eligible for garbage collection if it has no references attached to it.The garbage collection is explained in the below example.Examplevar obj = { x: { y: 2 } }; // 2 objects created. One is referenced by the other as one of its properties. // Obviously, none can be garbage-collected obj = 1; // what was the 'x' property of the ... Read More
To display tree structured data, use the JTree control in Java Swing.At first, create a node in the tree −DefaultMutableTreeNode node = new DefaultMutableTreeNode("Project");Now, add nodes to the node created above −DefaultMutableTreeNode node1 = new DefaultMutableTreeNode("App"); DefaultMutableTreeNode node2 = new DefaultMutableTreeNode("Website"); DefaultMutableTreeNode node3 = new DefaultMutableTreeNode("WebApp"); node.add(node1); node.add(node2); node.add(node3);Now, create more nodes and set them as child nodes for the nodes we creted above −DefaultMutableTreeNode one = new DefaultMutableTreeNode("Learning website"); DefaultMutableTreeNode two = new DefaultMutableTreeNode("Business website"); DefaultMutableTreeNode three = new DefaultMutableTreeNode("News publishing website"); DefaultMutableTreeNode four = new DefaultMutableTreeNode("Android app"); DefaultMutableTreeNode five = new DefaultMutableTreeNode("iOS app"); DefaultMutableTreeNode six = new DefaultMutableTreeNode("Editor ... Read More
Use $addToSet to create a new field in MongoDB. Let us first create a collection with documents −> db.createFieldDemo.insertOne({"StudentFirstName":"John", "StudentAge":21}); { "acknowledged" : true, "insertedId" : ObjectId("5cd99e28b50a6c6dd317ad95") } > db.createFieldDemo.insertOne({"StudentFirstName":"Larry", "StudentAge":23}); { "acknowledged" : true, "insertedId" : ObjectId("5cd99e2fb50a6c6dd317ad96") } > db.createFieldDemo.insertOne({"StudentFirstName":"Chris", "StudentAge":22}); { "acknowledged" : true, "insertedId" : ObjectId("5cd99e38b50a6c6dd317ad97") } > db.createFieldDemo.insertOne({"StudentFirstName":"David", "StudentAge":25}); { "acknowledged" : true, "insertedId" : ObjectId("5cd99e43b50a6c6dd317ad98") }Following is the query to display all documents from a collection with the help of find() method −> db.createFieldDemo.find().pretty();This will produce the following output −{ "_id" : ObjectId("5cd99e28b50a6c6dd317ad95"), "StudentFirstName" : ... Read More
The HTML DOM Input Time Object represents an input HTML element with type Time.SyntaxFollowing is the syntax −Creating an with type timevar timeObject = document.createElement(“input”); timeObject.type = “time”;AttributesHere, “time” can have the following attributes −AttributesDescriptionautocompleteIt defines the value of autocomplete attribute of a time fieldautofocusIt defines if the time field should be focused on initial page load.defaultValueIt sets/returns the default value of time fielddisabledIt defines if time field is disabled/enabledformIt returns a reference of enclosing form that contains the time fieldmaxIt returns/sets the value of max attribute of time fieldminIt returns/sets the value of min attribute of time fieldnameIt ... Read More
Python object oriented programming allows variables to be used at the class level or the instance level where variables are simply the symbols denoting value you’re using in the program. At the class level, variables are referred to as class variables whereas variables at the instance level are referred to as instance variables. Let’s understand the class variable and instance variable through a simple example −# Class Shark class Shark: animal_type= 'fish' # Class Variable def __init__(self, name, age): self.name = name self.age = age # Creating objects of Shark class obj1 = Shark("Jeeva", 54) obj2 = Shark("Roli", 45) ... Read More
Here we will see the effect of fork() and exec() system call in C. The fork is used to create a new process by duplicating the calling process. The new process is the child process. See the following property.The child process has its own unique process id.The parent process id of the child process is same as the process id of the calling process.The child process does not inherit the parent’s memory lock and semaphores.The fork() returns the PID of the child process. If the value is non-zero, then it is parent process’s id, and if this is 0, then ... Read More
This example demonstrate about How to determine if an activity has been called by a Notification in AndroidStep 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 res/layout/activity_main.xml. Step 3 − Add the following code to src/MainActivity.package app.tutorialspoint.com.notifyme ; import android.app.NotificationChannel ; import android.app.NotificationManager ; import android.app.PendingIntent ; import android.content.Intent ; import android.os.Bundle ; import android.support.v4.app.NotificationCompat ; import android.support.v7.app.AppCompatActivity ; import android.util.Log ; import android.view.View ; public class MainActivity extends AppCompatActivity { public ... Read More
SortingSorting is nothing but displaying elements in ascending or descending order. Array.sort() function is to sort the array according to the compare() function in JavaScript.a) In the given program we are going to sort the array by age property in descending order. Live DemoExample var persons = [ { name: 'rajesh', birthdate: 1845, death: 1875 }, { name: 'Bharat', birthdate: 1909, death: 1917}, { name: ... Read More