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Articles by Arushi
Page 5 of 9
How to get locale information from Network provider in android?
This example demonstrate about How to get locale information from Network provider in android.Step 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. In the above code, we have taken text view to show locale infomation.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.Manifest; import android.content.pm.PackageManager; import android.location.Address; import android.location.Geocoder; import android.location.Location; import android.location.LocationManager; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v4.app.ActivityCompat; import android.support.v7.app.AppCompatActivity; import android.widget.TextView; import java.io.IOException; ...
Read MoreWhat is the default type of a bit value assigned to user variables?
By default, the bit values assigned to the user variables are binary strings. It can be illustrated by assigning the bit value to a user variable and then by retrieving them as follows −mysql> SET @abc = 0b1000011; Query OK, 0 rows affected (0.00 sec) mysql> Select @abc; +------+ | @abc | +------+ | C | +------+ 1 row in set (0.00 sec)The above result set shows that the default type of a bit value assigned to user variables are binary strings.
Read MoreDifference between HashMap and ConcurrentHashMap in Java
Following are the notable differences between HashMap and ConcurrentHashMap classes in Java. HashMapConcurrentHashMapSynchronizedHashMap is not synchronized.ConcurrentHashMap is synchronized.Thread SafeHashMap is not thread safe.ConcurrentHashMap is thread safe.Iterator typeHashMap iterator is fail-fast and ArrayList throws ConcurrentModificationException if concurrent modification happens during iteration.ConcurrentHashMap is fail-safe and it will never throw ConcurrentModificationException during iteration.Null valuesHashMap allows key and value to be null.ConcurrentHashMap does not allow null key/value. It will throw NullPointerException.PerformanceHashMap is faster.ConcurrentHashMap is slower than HashMap.Since Java Version1.21.5Exampleimport java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.concurrent.CopyOnWriteArrayList; public class Tester { public static void main(String[] args) { ...
Read MoreWhile fetching the data as output, how can I use multiple conditions on same column?
Followings are the ways in which we can write a query that returns only records that matches multiple conditions on the same columnBy using ‘OR’ logical operatorAs we know that MySQL ‘OR’ operator compares two expressions and returns TRUE if either of the expression is TRUE. Following example demonstrate that how we can use ‘OR’ operator for multiple conditions on the same columnmysql> Select * from Student WHERE Name = 'Gaurav' OR Name = 'Aarav'; +------+--------+---------+-----------+ | Id | Name | Address | Subject | +------+--------+---------+-----------+ | 1 | Gaurav | Delhi | Computers ...
Read MoreWhat happens if I will try to drop PRIMARY KEY constraint from the AUTO_INCREMENT column?
As we know the AUTO_INCREMENT column must have the PRIMARY KEY constraint on it also hence when we will try to drop PRIMARY KEY constraint from the AUTO_INCREMENT column the MySQL returns an error message regarding the incorrect table definition. The example below will demonstrate it −ExampleSuppose we have ‘Accounts’ table having the following description −mysql> Describe accounts; +--------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +--------+-------------+------+-----+---------+----------------+ | Sr | int(10) | NO | PRI | NULL | auto_increment | ...
Read MoreWhat are free Online Favicon Generators?
A favicon is a little icon visible on the web browser tab, just before the page title. It is generally a logo with the smaller size. Creating it is not something to worry about. Online Favicon Generators easily gives options to create a Favicon for free on button click.Let us see some of the free online Favicon Generators, Favicon.ccFavicon.cc is a favicon creator and generator. Design or you can easily import a logo to design your favicon. You can also create animated Favicon here.Favicon-Generator.orgUsing this create and generate icons for the Web, Android, Microsoft, and iOS apps. Choose an image ...
Read MoreInitialization, declaration and assignment terms in Java
A variable provides us with named storage that our programs can manipulate. Each variable in Java has a specific type, which determines the size and layout of the variable's memory; the range of values that can be stored within that memory; and the set of operations that can be applied to the variable.You must declare all variables before they can be used. Following is the basic form of a variable declaration − data type variable [ = value][, variable [ = value] ...] ;Here data type is one of Java's datatypes and variable is the name of the variable. To ...
Read MoreHow do you find the sum of all the numbers in a java array
Following program print the sum of the all the numbers in an array.Examplepublic class Tester { public static void main(String[] args) { int[] dataArray = {1, 2, 3, 4}; int sum = 0; for(int i: dataArray) { sum += i; } System.out.println(sum); } }Output10
Read MoreHow to count the number of lines in a text file using Java?
To count the number of lines in a fileInstantiate the FileInputStream class by passing an object of the required file as parameter to its constructor.Read the contents of the file to a bytearray using the read() method of FileInputStream class.Instantiate a String class by passing the byte array obtained, as a parameter its constructor.Now, split the above string into an array of strings using the split() method by passing the regular expression of the new line as a parameter to this method.Now, find the length of the obtained array.Exampleimport java.io.File; import java.io.FileInputStream; public class NumberOfCharacters { public ...
Read MoreHow to define constants in C++?
You can define constants in C++ by adding the const qualifier before the declaration of the variable. Example#include using namespace std; int main() { const int x = 9; x = 0; return 0; }This will define the constant variable x. But it will throw an error as we are trying to rewrite the value of a constant.
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