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In Memory Mapped Input Output −We allocate a memory address to an Input-Output device.Any instructions related to memory can be accessed by this Input-Output device.The Input-Output device data are also given to the Arithmetic Logical Unit.Input-Output Mapped Input Output −We give an Input-Output address to an Input-Output device.Only IN and OUT instructions are accessed by such devices.The ALU operations are not directly applicable to such Input-Output data.So as a summary we can mention that −I/O is any general-purpose port used by processor/controller to handle peripherals connected to it.I/O mapped I/Os have a separate address space from the memory. So, total ... Read More
This example demonstrate about How to store elements in numeric order for Listview 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 name and record number as Edit text, when user click on save button it will store the data into arraylist. Click on ... Read More
This example demonstrate about How to change current country code 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 a text view to show country code information.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 More
This example demonstrates How to set heap watch limit 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 heap status.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.app.ActivityManager; import android.app.admin.DevicePolicyManager; import android.content.Context; import android.net.wifi.WifiInfo; import android.net.wifi.WifiManager; import android.os.Build; import android.os.Bundle; import android.support.annotation.RequiresApi; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.TextView; public class MainActivity extends AppCompatActivity { ... Read More
Two types of add() methods are available in the CopyOnWriteArrayList class: add(E e) methodTo add elements in CopyOnWriteArrayList class in Java, use the add() method. Here, the element is appended to the end of the list.The syntax is as followsboolean add(E e)Here, the parameter e is the element to be appended to this list.To work with CopyOnWriteArrayList class, you need to import the following packageimport java.util.concurrent.CopyOnWriteArrayList;The following is an example to add elements in the CopyOnWriteArrayList class in JavaExample Live Demoimport java.util.concurrent.CopyOnWriteArrayList; public class Demo { public static void main(String[] args) { CopyOnWriteArrayList arrList = new CopyOnWriteArrayList(); ... Read More
It can be checked if a ChronoUnit is supported by the LocalTime class or not by using the isSupported() method in the LocalTime class in Java. This method requires a single parameter i.e. the ChronoUnit to check. It returns true if the ChronoUnit is supported by the LocalTime class and false otherwise.A program that demonstrates this is given as follows −Example Live Demoimport java.time.*; import java.time.temporal.*; public class Demo { public static void main(String[] args) { LocalTime lt = LocalTime.now(); System.out.println("The LocalTime is: " + lt); boolean flag = lt.isSupported(ChronoUnit.HOURS); ... Read More
Operator overloading has an important role in object oriented programming language features. Operator overloading is a type of compile time or static polymorphism.AlgorithmBegin Create a class Arr and declare size of array. Inside the class, initialize all the elements by using for loop. Print the all elements. End.Example Code Live Demo#include #include using namespace std; const int M = 7; class Arr { private: int A[M]; int size; public: Arr(int s, int v) { if(s>M) { cout
To implement AND condition, the syntax is as follows −select *from yourTableName where yourColumnName1 = yourValue1 AND yourColumnName2 = yourValue2;To understand the above syntax, let us create a table. The query to create a table is as follows −mysql> create table MySQLANDConditionDemo -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(100), -> Age int -> ); Query OK, 0 rows affected (0.80 sec)Insert some records in the table using insert command. The query is as follows −mysql> insert into MySQLANDConditionDemo(Name, Age) values('Larry', 23); Query OK, 1 row affected (0.11 sec) mysql> ... Read More
Yes, we can do that. To understand, let us first create a table −mysql> create table enforceCompoundUniqueness -> ( -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentName varchar(40) NOT NULL, -> StudentMobileNumber varchar(12) NOT NULL, -> UNIQUE StudentName_StudentMobileNumber(StudentName, StudentMobileNumber) -> ); Query OK, 0 rows affected (0.60 sec)Following is the query to insert records in the table using insert command −mysql> insert into enforceCompoundUniqueness(StudentName, StudentMobileNumber) values('Larry', '2322245676'); Query OK, 1 row affected (0.18 sec) mysql> insert into enforceCompoundUniqueness(StudentName, StudentMobileNumber) values('Larry', '2322245676'); ERROR 1062 (23000): Duplicate entry 'Larry-2322245676' for key 'StudentName_StudentMobileNumber' ... Read More
You can use LENGTH() to count number of specific symbols in a row. Let us first create a table −mysql> create table DemoTable ( Value varchar(200) ); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('?1234?6789?5656?324?'); Query OK, 1 row affected (0.17 sec)Following is the query to display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+----------------------+ | Value | +----------------------+ | ?1234?6789?5656?324? | ... Read More