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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to get LocalDateTime object from java.sql.Date using JDBC?
The java.time package of Java8 provides a class named LocalDateTime is used to get the current value of local date and time. Using this in addition to date and time values you can also get other date and time fields, such as day-of-year, day-of-week and week-of-year.Converting java.sql.Date to LocalDateTimeThe java.sql.TimeStamp class provides a method with name toLocalDateTime() this method converts the current timestamp object to a LocalDateTime object and returns it.To convert date to LocalDateTime object.Create a Timestamp object from Date object using the getTime() method as −Date date = rs.getDate("DispatchDate"); //Converting Date to Timestamp Timestamp timestamp = new Timestamp(date.getTime());Now, ...
Read MoreHow to get memory usage at runtime using C++?
We can get the memory usage like virtual memory usage or resident set size etc. at run time. To get them we can use some system libraries. This process depends on operating systems. For this example, we are using Linux operating system.So here we will see how to get the memory usage statistics under Linux environment using C++. We can get all of the details from “/proc/self/stat” folder. Here we are taking the virtual memory status, and the resident set size.Example#include #include #include #include #include using namespace std; void mem_usage(double& vm_usage, double& resident_set) { ...
Read MoreHow to set an Android notification to a specific date in the future?
This example demonstrate about How to set an Android notification to a specific date in the future.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. Step 3 − Add the following code to src/MainActivity.package app.tutorialspoint.com.notifyme ; import android.app.AlarmManager ; import android.app.DatePickerDialog ; import android.app.Notification ; import android.app.PendingIntent ; import android.content.Context ; import android.content.Intent ; import android.os.Bundle ; import android.support.v4.app.NotificationCompat ; import android.support.v7.app.AppCompatActivity ; import android.view.View ; import android.widget.Button ; import android.widget.DatePicker ; ...
Read MoreHow to position component at the top of the grid cell with GridBagLayout in Java?
To position components at the top fo the grid cell, set the GridBagConstraints. Let’s say we have a panel and within that two CheckBox components −JPanel panel1 = new JPanel(new GridBagLayout()); JCheckBox checkBox1 = new JCheckBox("Undergraduate"); JCheckBox checkBox2 = new JCheckBox("Graduate");Position the components now −panel1.add(checkBox1, new GridBagConstraints(0, 0, 1, 1, 1.0, 1.0, GridBagConstraints.NORTH, GridBagConstraints.NORTH, new Insets(0, 0, 0, 0), 0, 0)); panel1.add(checkBox2, new GridBagConstraints(1, 0, 1, 1, 2.0, 0.0, GridBagConstraints.NORTH, GridBagConstraints.NORTH, new Insets(0, 0, 0, 0), 0, 0));The following is an example to position component at the top of the grid cell with GridBagLayout −Examplepackage my; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.Insets; ...
Read MoreIs it mandatory to register the driver while working with JDBC?
Initially, till Java6 it is needed to register the driver using Class.forname() or the registerDriver() method before establishing connection with the database.But, since Java 1.6, JDBC 4.0 API, there is no need to register the driver explicitly, You Just need to set the Class path for the JDBC 4.X driver, Java automatically detects the Driver class and loads it.ExampleIn the following JDBC program we are trying connect with MySQL database first of all include the dependency for the MySQL driver in the pom.xml of your project. mysql mysql-connector-java 8.0.16 Then, without registering the MySQL driver class com.mysql.jdbc.Driver ...
Read MoreHow to create everyday notifications at certain time in Android?
This example demonstrate about How to create everyday notifications at certain time 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.AlarmManager ; import android.app.DatePickerDialog ; import android.app.Notification ; import android.app.PendingIntent ; import android.content.Context ; import android.content.Intent ; import android.os.Bundle ; import android.support.v4.app.NotificationCompat ; import android.support.v7.app.AppCompatActivity ; import android.view.View ; import android.widget.Button ; import android.widget.DatePicker ; import java.text.SimpleDateFormat ; import ...
Read MoreHow to insert a DATALINK object into a table using JDBC?
A DATALINK object represents an URL value which refers to an external resource (outside the current database/data source), which can be a file, directory etc.You can store a DATALINK into an SQL table using the setURL() method of the PreparedStatement interface. This method accepts an integer value representing an index of the bind variable, an URL object and, inserts the given URL object in the column represented by the bind variable in the specified index.ExampleLet us create a table with name tutorials_data in MySQL database using CREATE statement as shown below −CREATE TABLE tutorials_data ( tutorial_id INT PRIMARY KEY ...
Read MoreDisplay records with more than two occurrences in MySQL?
For this, you can use GROUP BY HAVING clause. Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Subject varchar(100) -> ); Query OK, 0 rows affected (0.53 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Subject) values('MySQL'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(Subject) values('MongoDB'); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable(Subject) values('MySQL'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(Subject) values('Java'); Query OK, 1 ...
Read MoreHandling large numbers in C++?
In C++, we can use large numbers by using the boost library. This C++ boost library is widely used library. This is used for different sections. It has large domain of applications. For example, using boost, we can use large number like 264 in C++.Here we will see some examples of boost library. We can use big integer datatype. We can use different datatypes like int128_t, int256_t, int1024_t etc. By using this we can get precision up to 1024 easily.At first we are multiplying two huge number using boost library.Example#include #include using namespace boost::multiprecision; using namespace std; int128_t large_product(long ...
Read MoreHow to create an Android notification with expiration date?
This example demonstrate about How to create an Android notification with expiration dateStep 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.AlarmManager ; import android.app.DatePickerDialog ; import android.app.Notification ; import android.app.PendingIntent ; import android.content.Context ; import android.content.Intent ; import android.os.Bundle ; import android.support.v4.app.NotificationCompat ; import android.support.v7.app.AppCompatActivity ; import android.view.View ; import android.widget.Button ; import android.widget.DatePicker ; import java.text.SimpleDateFormat ; import ...
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