At first, set an Internal Frame in the JDesktopPane −JDesktopPane desktopPane = new JDesktopPane(); JInternalFrame intFrame = new JInternalFrame("Our Frame", true, true, true, true); desktopPane.add(intFrame);Now, set the bounds of the Internal Frame −intFrame.setBounds(50, 90, 200, 250);Create two components −JLabel label = new JLabel(intFrame.getTitle(), JLabel.CENTER); JButton button = new JButton("Demo Button");Add ... Read More

To delete specific record, use $pull operator. Let us first create a collection with documents −> dbdeletingSpecificRecordDemoinsertOne(    {       "StudentDetails": [          {             "StudentName": "John",             "StudentSubjectDetails": [           ... Read More

Let us first create a JTabbedPane −JTabbedPane tabbedPane = new JTabbedPane();Create some panels −JPanel panel1, panel2, panel3, panel4, panel5; panel1 = new JPanel(); panel2 = new JPanel(); panel3 = new JPanel(); panel4 = new JPanel(); panel5 = new JPanel();Now, add tabs using the addTab() method and set the panels as ... Read More

Use the setHgap() method to set the horizontal gap between elements in a GridLayout. Let’s say we have a GridLaypout −GridLayout layout = new GridLayout(2, 4);Set the horizontal gap −layout.setHgap(25);The following is an example −Examplepackage my; import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Font; import java.awt.GridLayout; import javax.swing.JButton; import javax.swing.JFrame; ... Read More

For this, use MongoDB $substr. Let us first create a collection with documents −> dblimitTheNumberOfCharactersDemoinsertOne({"Title":"MongoDB is No SQL database"}); {    "acknowledged" : true,    "insertedId" : ObjectId("5cf23013b64a577be5a2bc0e") } > dblimitTheNumberOfCharactersDemoinsertOne({"Title":"MySQL is a relational database"}); {    "acknowledged" : true,    "insertedId" : ObjectId("5cf2302db64a577be5a2bc0f") } Following is the query ... Read More

To check if two nodes are equal, use the equals() method. Here, we are checking that node1 and node2 are equal or not.node1.equals(node2)The following is an example to check if two nodes are equal in a JTree −package my; import javax.swing.JFrame; import javax.swing.JTree; import javax.swing.tree.DefaultMutableTreeNode; public class SwingDemo {   ... Read More

Set the following to FALSE to enable the display of hidden files −JFileChooser file = new JFileChooser(); file.setFileHidingEnabled(false);The following is an example to enable the display of hidden files in a JFileChooser −Examplepackage my; import javax.swing.JFileChooser; public class SwingDemo {    public static void main(String[] args) {       ... Read More

The currentTarget event property in HTML is used to get the element whose event listeners triggered the event.Following is the syntax −event.currentTargetLet us now see an example to implement the currentTarget event property −Example Live Demo Get the element Click on this line to generate an alert box displaying ... Read More

This example demonstrate about How to turn Android device screen on and off programmatically.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     ... Read More

This example demonstrate about How to lock the Android device programmatically.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           ... Read More