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Articles on Trending Technologies
Technical articles with clear explanations and examples
How secure bitcoin currency is?
From a connoisseur to a novice who deal in Bitcoin have a number of questions in terms of the security of this currency. However, they should not be worried because crypto is securer than existing currencies, banks, and other financial institutes.Thanks to Blockchain technology, which is backing it. Transactions are recorded in public, distributed ledger turn it more transparent and makes it even harder to temper it.However, cryptocurrency transactions and Blockchain ledgers do have a few security flaws, but they are not essentially the fault of the underlying technology. The structure of Bitcoin and its Blockchain means there are facets ...
Read MoreJava DatabaseMetaData getSearchStringEscape() method with example
The getSearchStringEscape() method of the DatabaseMetaData interface is used to get the that is used to escape the wildcard characters ('_' or, '%') by the underlying database.This method returns a string parameter representing the value that is used to escape wildcard charactersTo get the DatabaseMetaData object −Make sure your database is up and running.Register the driver using the registerDriver() method of the DriverManager class. Pass an object of the driver class corresponding to the underlying database.Get the connection object using the getConnection() method of the DriverManager class. Pass the URL the database and, user name, password of a user in the database, ...
Read MoreHow to remove menus from MenuBar in Java?
Remove a menu from the MenuBar using the remove() method. Set the index for the menu you want to remove from the MenuBar.Let’s say we have the following two menus initially −The following is an example to remove one the above menus. Let’s say we are removing the 2nd menus “Edit” −Examplepackage my; import java.awt.event.KeyEvent; 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[]) { JFrame frame = new JFrame("MenuBar Demo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JMenuBar menuBar = new JMenuBar(); JMenu ...
Read MoreHow to Mine Ethereum?
Ethereum Mining GuideEthereum Blockchain BasicsAs we all know, cryptocurrency mining is a process of solving complicated mathematical puzzles and miners play a crucial role in any cryptocurrency network as they spend their time and computing power to puzzle out those math problems, giving a ‘proof of work’ for the network, which verifies Ether transactions. Other than this, miners are responsible for making new Ether tokens through this process. This way, they get rewards in Ether for successfully completing a proof of work task.The more miners join the group, the puzzles automatically turn out more difficult to solve. This leads to ...
Read MoreHow to arrange components in a Flow to be right-justified in Java?
Use FlowLayout.RIGHT to arrange components in a FlowLayout to be right-justified. −JFrame frame = new JFrame("Language"); frame.setLayout(new FlowLayout(FlowLayout.RIGHT));The following is an example to arrange components in a flow to be right-justified −Examplepackage my; import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextArea; import javax.swing.WindowConstants; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame("Language"); frame.setLayout(new FlowLayout(FlowLayout.RIGHT)); JLabel label = new JLabel("Most Spoken Language "); label.setPreferredSize(new Dimension(220, 70)); label.setOpaque(true); label.setBackground(Color.RED); ...
Read MoreDisplay tick marks in a JSlider with Java
To display tick marks in a JSlider, you need to use the setPaintTicks() method and set it to TRUE −JSlider slider = new JSlider(JSlider.HORIZONTAL, 0, 100, 75); slider.setPaintTicks(true);The following is an example to display tick marks in a slider in Java −Examplepackage my; import java.awt.Color; import java.awt.Font; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JSlider; import javax.swing.WindowConstants; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame("Frame with Slider"); JSlider slider = new JSlider(JSlider.HORIZONTAL, 0, 100, 75); slider.setMinorTickSpacing(5); slider.setMajorTickSpacing(20); slider.setPaintTicks(true); ...
Read MoreHow do bitcoin ATMs work?
This might fall upon like a shock on those who think that only cash can be transact from an ATM. In this era of crypto and digital currency, things have taken a leap now. Thanks to technology! As of April 2019, there are more than 4, 518 bitcoin ATMs across the globe, the number is constantly on the surge, and so is the miners considering the fascination for this currency.However, the thought of getting them cash out leave many miners baffled; however, this read has been created to clear the air about all the doubts you have.The Functionality of Bitcoin ...
Read MoreHow to style an Android notification using InboxStyle?
This example demonstrate about How to style an Android notification using InboxStyleStep 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.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 ; public class MainActivity extends AppCompatActivity { public static final String NOTIFICATION_CHANNEL_ID = "10001" ; private final static String default_notification_channel_id = "default" ...
Read MoreHow to set vertical gap between elements in a GridLayout with Java?
Use the setVgap() method to set the vertical gap between elements in a GridLayout. Let’s say we have a GridLaypout −GridLayout layout = new GridLayout(3, 3);Set the horizontal gap −layout.setVgap(30);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; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextArea; import javax.swing.WindowConstants; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame("Sections"); JPanel panel = new JPanel(); panel.setBackground(Color.blue); GridLayout layout = new GridLayout(3, 3); ...
Read MoreJava ResultSet isBeforeFirst() method with example
When we execute certain SQL queries (SELECT query in general) they return tabular data.The java.sql.ResultSet interface represents such tabular data returned by the SQL statements.i.e. the ResultSet object holds the tabular data returned by the methods that execute the statements which quires the database (executeQuery() method of the Statement interface in general).The ResultSet object has a cursor/pointer which points to the current row. Initially this cursor is positioned before first row.The isBeforeFirst() method of the ResultSet interface is used to determine whether the cursor is at the default position of the ResultSet.rs.isBeforeFirst();This method returns an boolean this value is true, if the cursor is ...
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