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Articles on Trending Technologies
Technical articles with clear explanations and examples
How to create a LineBorder with BorderFactory class in Java?
To create line border, use the createLineBorder() method. Let us first create a label component −JLabel label; label = new JLabel("Demo label");Now, create line border with BorderFactory class. Here, we have also set the color for the line border −label.setBorder(BorderFactory.createLineBorder(Color.yellow));The following is an example to create a LineBorder with BorderFactory class −package my; import javax.swing.BorderFactory; import java.awt.Color; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JLabel; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Demo"); JLabel label; label = new JLabel("Demo label"); ...
Read MoreHow to create a Matte-look border using a solid color in Java?
The matte border gives a “matte” look. Let’s say the following is our component −JLabel label; label = new JLabel("This has matte border!");Let us create a matte border with BorderFactory class. Here, we have given color YELLOW using the Color class −label.setBorder(BorderFactory.createMatteBorder(3, 5, 10, 5, Color.YELLOW));The following is an example to create a Matte-look border −Examplepackage my; import javax.swing.BorderFactory; import java.awt.Color; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JLabel; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame = new JFrame("Demo"); JLabel label; label = new JLabel("This ...
Read MoreHow to start a transaction in JDBC?
A transaction is a unit of work that is performed against a database. Transactions are units or sequences of work accomplished in a logical order, whether in a manual fashion by a user or automatically by some sort of a database program.A transaction is the propagation of one or more changes to the database. For example, if you are creating a record or updating a record or deleting a record from the table, then you are performing a transaction on that table. It is important to control these transactions to ensure the data integrity and to handle database errors.Ending a ...
Read MoreHow to update a column with the same values (not all) using UPDATE, SET and LIMIT in MySQL?
Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(20) -> ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name) values('Carol'); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable(Name) values('Chris'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(Name) values('David'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(Name) values('Bob'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable(Name) ...
Read MoreHow to create an Android notification without the icon in the status bar?
This example demonstrate about How to create an Android notification without the icon in the status barStep 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details tocreate a new project.Step 2 − Add the following code to res/layout/activity_main.xml. Step 3 − Add the following code to res/layout/custom_notification_layout.xml. Step 4 − Add the following code to src/MainActivity.package app.tutorialspoint.com.notifyme ; import android.app.NotificationChannel ; import android.app.NotificationManager ; import android.os.Bundle ; import android.support.v4.app.NotificationCompat ; import android.support.v7.app.AppCompatActivity ; import android.view.View ; import android.widget.RemoteViews ; public class ...
Read MoreHow to center a JLabel in a JPanel with GridBagLayout in Java?
Center a component in a JPanel with GridBagLayout. Let us first create a JFrame and JPanel inside it -JFrame frame = new JFrame("Demo Frame"); JPanel panel = new JPanel();Now, we will add our components −JLabel label = new JLabel("Demo Label (Centered)"); label.setForeground(Color.white); JCheckBox checkBox = new JCheckBox("Checkbox (Centered)");Set the layout −panel.setLayout(new GridBagLayout());The following is an example to center a label in a panel with GridBagLayout −Examplepackage my; import java.awt.Color; import java.awt.GridBagLayout; import javax.swing.JCheckBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.WindowConstants; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame("Demo ...
Read MoreCheck whether a node is a root node or not in JTree
To check whether a node is a root node or not, use the isRoot() method. This returns a boolean value. TRUE if the node is a root node, else FALSE is returned. For example, TRUE is returned since the following node is a root node −node.isRoot()Another example, FALSE is returned since the following node isn’t a root node −node2.isRoot()The following is an example to check whether a node is a root node or not −Examplepackage my; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; public class SwingDemo { public static void main(String[] args) throws Exception { JFrame frame ...
Read MoreConcatenating two strings in MySQL with space?
For this, you can use concat() function from MySQL. Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(20), -> Subject varchar(100) -> ); Query OK, 0 rows affected (17.73 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name, Subject) values('John', 'MySQL'); Query OK, 1 row affected (1.19 sec) mysql> insert into DemoTable(Name, Subject) values('Chris', 'SQL Server'); Query OK, 1 row affected (0.88 sec) mysql> insert into DemoTable(Name, Subject) values('Robert', 'MongoDB'); Query OK, 1 row affected ...
Read MoreHow to remove notification from notification bar programmatically in android?
This example demonstrate about How to remove notification from notification bar programmatically 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 res/layout/custom_notification_layout.xml. Step 4 − Add the following code to src/MainActivity.package app.tutorialspoint.com.notifyme ; import android.app.NotificationChannel ; import android.app.NotificationManager ; import android.os.Bundle ; import android.support.v4.app.NotificationCompat ; import android.support.v7.app.AppCompatActivity ; import android.view.View ; import android.widget.RemoteViews ; public class MainActivity ...
Read MoreHow to add Internal Frame to a JDesktopPane in Java?
At first, create a JDesktoPane −JDesktopPane desktopPane = new JDesktopPane();Now, create an Internal frame and add it to the JDesktopPane −JInternalFrame intFrame = new JInternalFrame("Our Frame", true, true, true, true); desktopPane.add(intFrame); The following is an example to add Internal Frame to a JDesktopPane − package my; import java.awt.BorderLayout; import javax.swing.JButton; import javax.swing.JDesktopPane; import javax.swing.JFrame; import javax.swing.JInternalFrame; import javax.swing.JLabel; public class SwingDemo { public static void main(final String[] args) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JDesktopPane desktopPane = new JDesktopPane(); JInternalFrame intFrame = new JInternalFrame("Our Frame", true, ...
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