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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to make a txt file in internal storage in android?
This example demonstrates How to make a txt file in internal storage 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 editext and button. When the user clicks on the button, it will take data from edit text and store in internal storage as /data/data//files/text/sample.txt.Step 3 − Add the following code to src/MainActivity.javapackage com.example.andy.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; ...
Read MoreHow to get current state of activity in android?
This example demonstrates How to get current state of activity 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 activity state.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.ComponentName; 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 MoreJava Program to convert Instant to LocalDateTime
Let’s say you need to convert Instant to LocalDateTime with IST with timezone:Create an Instant:Instant instant = new Date().toInstant();Now, convert Instant to LocalDateTime:LocalDateTime date = LocalDateTime.ofInstant(instant, ZoneId.of(ZoneId.SHORT_IDS.get("IST")));Exampleimport java.time.Instant; import java.time.LocalDateTime; import java.time.ZoneId; import java.util.Date; public class Demo { public static void main(String[] args) { Instant instant = new Date().toInstant(); LocalDateTime date = LocalDateTime.ofInstant(instant, ZoneId.of(ZoneId.SHORT_IDS.get("IST"))); System.out.println("Date (IST) = " + date); date = LocalDateTime.ofInstant(instant, ZoneId.of(ZoneId.SHORT_IDS.get("PST"))); System.out.println("Date (PST) = " + date); date = LocalDateTime.ofInstant(instant, ZoneId.of(ZoneId.SHORT_IDS.get("EST"))); System.out.println("Date (EST) = " ...
Read MoreChange the file extension in the text column in MySQL?
To change the file extension in the text column, you can use UPDATE command along with REPLACE() function. Let’s say we have some columns with extensions and we need to replace all of them. For that, let us first create a table with the extension columns set as text type:mysql create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, ProgramExtension1 text, ProgramExtension2 text, ImageExtension text ); Query OK, 0 rows affected (0.52 sec)Following is the query to insert records in the table using insert command:mysql> insert into DemoTable(ProgramExtension1, ProgramExtension2, ImageExtension)values('.java', '.c', '.jpeg'); Query OK, ...
Read MoreHow to use a filter in JSP?
Following example shows how to print the client's IP address and the current date time, each time it would access any JSP file. This example will give you a basic understanding of the JSP Filter, but you can write more sophisticated filter applications using the same concept −// Import required java libraries import java.io.*; import javax.servlet.*; import javax.servlet.http.*; import java.util.*; // Implements Filter class public class LogFilter implements Filter { public void init(FilterConfig config) throws ServletException { // Get init parameter String testParam = config.getInitParameter("test-param"); //Print the init parameter ...
Read MoreHow to use contains () in Android text view?
This example demonstrate about How to use contains () in Android text view.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 as Edit text, when user click on button it will take data and compare with tutorialspoint string.Step 3 − Add the following code to src/MainActivity.javapackage com.example.myapplication; import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; ...
Read MoreIgnoring the year in MySQL Query with date range?
To ignore the year with date range, use the DATE_FORMAT() with the between clause. Let us first create a demo table. The query to create a table is as follows −mysql> create table igonreYearDemo -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> ShippingDate date -> ); Query OK, 0 rows affected (0.75 sec)Insert some records in the table using insert command. The query is as follows −mysql> insert into igonreYearDemo(ShippingDate) values('2016-01-31'); Query OK, 1 row affected (0.16 sec) mysql> insert into igonreYearDemo(ShippingDate) values('2018-01-31'); Query OK, 1 row affected (0.13 sec) mysql> insert into ...
Read MoreDevelop a WiFi Scanner for Android
This example demonstrate about How to develop a WiFi Scanner for 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.javapackage com.example.myapplication; import android.Manifest; import android.content.Context; import android.content.IntentFilter; import android.content.pm.PackageManager; import android.net.wifi.WifiManager; import android.os.Build; import android.support.annotation.NonNull; import android.support.v4.app.ActivityCompat; import android.support.v4.content.ContextCompat; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button; import android.widget.ListView; import android.widget.Toast; public class MainActivity extends AppCompatActivity { private ...
Read MoreFloor the decimal values in MySQL instead of round?
You can use TRUNCATE() method to floor the values instead of round. Let us first create a table −mysql> create table DemoTable ( Value DECIMAL(20, 8) ); Query OK, 0 rows affected (0.54 sec)Insert records in the table using insert command −mysql> insert into DemoTable values(23.5654433); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(12.345542211); Query OK, 1 row affected, 1 warning (0.21 sec) mysql> insert into DemoTable values(12345.678543); Query OK, 1 row affected (0.22 sec)Following is the query to display all records from the table using select statement −mysql> select *from DemoTable;This will produce the ...
Read MoreHow do you define multiple filters in JSP?
Your web application may define several different filters with a specific purpose. Consider, you define two filters AuthenFilter and LogFilter. Rest of the process will remain as explained above except you need to create a different mapping as mentioned below − LogFilter LogFilter test-param Initialization Paramter AuthenFilter AuthenFilter test-param Initialization Paramter LogFilter /* AuthenFilter /* Filters Application OrderThe order of filter-mapping elements ...
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