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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to right-align a menu in the menu bar with Java?
Let’s say we added a menu to the MenuBar −JMenuBar menuBar = new JMenuBar(); JMenu fileMenu = new JMenu("File"); fileMenu.setMnemonic(KeyEvent.VK_F); menuBar.add(fileMenu);Add the glue component in between the menus to align some of them on the right, for example −menuBar.add(Box.createHorizontalGlue());The menu added after the usage of above method, would get right-aligned −JMenu sourceMenu = new JMenu("Source"); sourceMenu.setMnemonic(KeyEvent.VK_S); menuBar.add(sourceMenu);The following is an example to right-align a menu in the menu bar with Java −Examplepackage my; import java.awt.event.KeyEvent; import javax.swing.Box; import javax.swing.JFrame; import javax.swing.JMenu; import javax.swing.JMenuBar; import javax.swing.JMenuItem; public class SwingDemo { public static void main(final String args[]) { ...
Read MoreHow to insert mm/dd/yyyy format dates in MySQL?
For this, use STR_TO_DATE(). Following is the syntax −insert into yourTableName values(STR_TO_DATE(yourDateValue, yourFormatSpecifier));Let us first create a table −mysql> create table DemoTable ( ShippingDate date ); Query OK, 0 rows affected (0.81 sec)Insert some records in the table using insert command : Here, we are inserting formatted dates using date formats like m, d, y, etc −mysql> insert into DemoTable values(STR_TO_DATE('06-01-2019', '%m-%d-%Y')); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values(STR_TO_DATE('01-31-2019', '%m-%d-%Y')); Query OK, 1 row affected (0.22 sec) mysql> insert into DemoTable values(STR_TO_DATE('02-01-2018', '%m-%d-%Y')); Query OK, 1 row affected (0.27 sec)Display all records ...
Read MoreMultiply values of two columns and display it a new column in MySQL?
Let us first create a table −mysql> create table DemoTable -> ( -> NumberOfItems int, -> Amount int -> ); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(4, 902); Query OK, 1 row affected (0.45 sec) mysql> insert into DemoTable values(5, 1000); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values(3, 80); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −mysql> select *from DemoTable;Output+---------------+--------+ | NumberOfItems | Amount | +---------------+--------+ | ...
Read MoreHow to display the items in a JComboBox in Java
The following is an example to display the first element in a JComboBox in Java:Exampleimport java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextArea; public class SwingDemo { public static void main(String[] args) { JPanel panel = new JPanel(new BorderLayout()); String[] strArr = new String[] { "Laptop", "Mobile", "Desktop", "Tablet" }; JComboBox comboBox = new JComboBox(strArr); panel.add(comboBox, BorderLayout.NORTH); JTextArea text = new JTextArea(5, 5); panel.add(text, BorderLayout.CENTER); JButton btn = new JButton("Click"); ...
Read MoreJava DatabaseMetaData supportsUnion() method with example.
The SQL UNION clause/operator is used to combine the results of two or more SELECT statements without returning any duplicate rows.To use this UNION clause, each SELECT statement must haveThe same number of columns selectedThe same number of column expressionsThe same data type andHave them in the same orderBut they need not have to be in the same length.The basic syntax of a UNION clause is as follows −SyntaxSELECT column1 [, column2 ] FROM table1 [, table2 ] [WHERE condition] UNION SELECT column1 [, column2 ] FROM table1 [, table2 ] [WHERE condition]The supportsUnion() method of the DatabaseMetaData interface is used to ...
Read MoreHow to sort by value with MySQL ORDER BY?
For this, use the ORDER BY clause. Let us first create a table −mysql> create table DemoTable ( StudentId int ); Query OK, 0 rows affected (0.59 sec)Now you can insert some records in the table using insert command −mysql> insert into DemoTable values(100); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(60); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(70); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(45); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable values(55); Query OK, 1 row affected ...
Read MoreHow to make the corners of a button round in iOS?
You might come across a scenarios where you received a UI where the buttons are rounded, and you might wonder how to do that? So here we will see how to make corners of a button round.We will be seeing both the ways to make the button rounded, one using Storyboard and another programmatically.Let’s get started! First we will make the corners of button rounded using Storyboard.Step 1 − Open Xcode → New Projecr → Single View Application → Let’s name it “RoundedButton”Step 2 − Open Main.storyboard and add a button as show belowStep 3 − Now select the button ...
Read MoreGenerate random numbers using C++11 random library
In C++11, we can get the random library to generate random numbers. Here we have used random_device once to seed the random number generator object called mt. This random_device is slower than the mt19937, but we do not need to seed it. It requests for random data to the operating system.Example #include #include using namespace std; int main() { random_device rd; mt19937 mt(rd()); uniform_real_distribution dist(20.0, 22.0); //range is 20 to 22 for (int i=0; i> dist(mt) >> endl; }Output21.5311 21.7195 21.0961 21.9679 21.197 21.2989 20.6333 20.441 20.7124 20.2654 21.1877 20.4824 20.0575 20.9432 21.222 21.162 21.1029 20.2253 21.5669 20.3357
Read MoreHow to pre-select JComboBox item by index in Java?
The following is an example to pre-select JComboBox item by index in Java. Here, we have selected the 3rd item by default i.e. whenever the Swing program will run, the third item would be visible instead of the 1st.Exampleimport java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextArea; public class SwingDemo { public static void main(String[] args) { JPanel panel = new JPanel(new BorderLayout()); String[] strArr = new String[] { "Laptop", "Mobile", "Desktop", "Tablet" }; JComboBox comboBox = new JComboBox(strArr); panel.add(comboBox, ...
Read MoreHow to close a Android notification after the user is clicking on it?
This example demonstrate about How to close a Android notification after the user is clicking on itStep 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 app.tutorialspoint.com.notifyme ; import android.app.NotificationChannel ; import android.app.NotificationManager ; import android.app.PendingIntent ; import android.content.Context ; import android.content.Intent ; import android.support.v4.app.NotificationCompat ; import android.support.v7.app.AppCompatActivity ; import android.os.Bundle ; import android.view.View ; import android.widget.Button ; public class MainActivity extends AppCompatActivity { ...
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