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Articles on Trending Technologies
Technical articles with clear explanations and examples
How can we set Mnemonic Key Radio Button in Java?
Mnemonic key is set so that a user can use Keyboard keys to select a Radio Button. For example, a key can be set with ALT −radio2.setMnemonic(KeyEvent.VK_R);Above, we have set key ALT+R for radio2.The following is an example to set Mnemonic key radio button −package my; import java.awt.FlowLayout; import java.awt.event.KeyEvent; import javax.swing.ButtonGroup; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JRadioButton; public class SwingDemo { public static void main(String[] args) { JRadioButton radio1 = new JRadioButton("Male"); JRadioButton radio2 = new JRadioButton("Female"); radio2.setMnemonic(KeyEvent.VK_R); ButtonGroup group = new ButtonGroup(); ...
Read MoreFetch domain name by passing name in MySQL?
To fetch domain name by passing name in MySQL, you can use substring_index(). Let us first create a table −mysql> create table DemoTable ( UserId int NOT NULL AUTO_INCREMENT PRIMARY KEY, UserMailId varchar(200) ); Query OK, 0 rows affected (0.77 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(UserMailId) values('John9989@facebook.com'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable(UserMailId) values('983773CS@yahoo.com'); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable(UserMailId) values('Chris95@gmail.com'); Query OK, 1 row affected (0.20 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+--------+-----------------------+ | UserId | UserMailId | +--------+-----------------------+ | ...
Read MoreI want to highlight all the text in the Java Swing Control Text Pane
To highlight all the text, use the selectAll() method of the JTextPane component −JTextPane pane = new JTextPane(); pane.selectAll();The following is an example to highlight the JTextPane text. Here, we are displaying a code in the JTextPane and highlighting it −Examplepackage my; import java.awt.BorderLayout; import java.awt.Container; import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTextPane; import javax.swing.text.BadLocationException; public class SwingDemo { public static void main(String args[]) throws BadLocationException { JFrame frame = new JFrame("Demo"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); Container container = frame.getContentPane(); JTextPane pane = new JTextPane(); pane.setContentType("text/html"); ...
Read MoreHow to check if Location Services are enabled in Android App?
This example demonstrate about How to check if Location Services are enabled in Android App.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.java Step 3 − Add the following code to src/MainActivity.javapackage app.tutorialspoint.com.sample ; import android.content.Context ; import android.content.DialogInterface ; import android.content.Intent ; import android.location.LocationManager ; import android.os.Bundle ; import android.provider.Settings ; import android.support.v7.app.AlertDialog ; import android.support.v7.app.AppCompatActivity ; import android.view.View ; import android.widget.Button ; import android.widget.TextView ; public class MainActivity extends AppCompatActivity ...
Read MoreHow to change JFrame background color in Java
At first, create a JFrame −JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setPreferredSize(new Dimension(550, 300));Now, change the background color of the JFrame −frame.getContentPane().setBackground(Color.BLUE);The following is an example to change JFrame background color −Exampleimport java.awt.Color; import java.awt.Dimension; import javax.swing.JFrame; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setPreferredSize(new Dimension(550, 300)); frame.getContentPane().setBackground(Color.BLUE); frame.pack(); frame.setVisible(true); } }Output
Read MoreJava Program to wrap text in a JTextPane and show Scrollbar
Let’s say we have lots of content in our JTextPane component −textPane.setText("This is demo text1. This is demo text2. This is demo text3." + "This is demo text4.This is demo text5. This is demo text6. " + "This is demo text7. This is demo text8. This is demo text9. " + "This is demo text10. This is demo text11. This is demo text12." + "This is demo text13. This is demo text13. This is demo text14." + "This is demo text15. This is demo text13. This is demo text16." + " This is demo ...
Read MoreHow can I validate EditText input in Android?
This example demonstrate about How can I validate EditText input in Android.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.java Step 3 − Add the following code to src/ValidateFilter.javapackage app.tutorialspoint.com.sample ; import android.text.InputFilter ; import android.text.Spanned ; import android.util.Log ; import java.util.regex.Matcher ; import java.util.regex.Pattern ; public class ValidateFilter implements InputFilter { @Override public CharSequence filter (CharSequence source , int start , int end , Spanned dest , int ...
Read MoreFind size of text stored in a specific MySQL column?
You can use length() from MySQL to find the size of text stores in a specific column. Let us first create a tablemysql> create table DemoTable ( CustomerName longtext ); Query OK, 0 rows affected (0.67 sec)Insert records in the table using insert command −mysql> insert into DemoTable values('Robert'); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output−+--------------+ | CustomerName | +--------------+ | Robert | +--------------+ 1 row in set (0.00 sec)Here is the query to find the size ...
Read MoreMySQL query to decrease the value of a specific record to zero?
Use SET to decrease the value and WHERE to set the condition for a specific record to be 0. Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Number int ); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command &minusmysql> insert into DemoTable(Number) values(10); Query OK, 1 row affected (0.20 sec) mysql> insert into DemoTable(Number) values(20); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(Number) values(1); Query OK, 1 row affected ...
Read MoreHow to define a MIN and MAX value for EditText in Android?
This example demonstrate about How to define a MIN and MAX value for EditText in Android.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.java Step 3 − Add the following code to src/MinMaxFilter.javapackage app.tutorialspoint.com.sample ; import android.text.InputFilter ; import android.text.Spanned ; public class MinMaxFilter implements InputFilter { private int mIntMin , mIntMax ; public MinMaxFilter ( int minValue , int maxValue) { this . mIntMin = minValue ...
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