Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
-
Economics & Finance
Articles on Trending Technologies
Technical articles with clear explanations and examples
How to select the first column in a JTable with Java?
To select the first column in a JTable, use the setColumnSelectionInterval() method. Here, set the indexes as interval for one end as well as other end.For the first column, set the range as 0 and 0 since we want to only select the first column with index 0 −table.setColumnSelectionInterval(0, 0);The following is an example to select the first column in a JTable −Examplepackage my; import java.awt.Color; import javax.swing.BorderFactory; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.ListSelectionModel; import javax.swing.border.TitledBorder; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame(); ...
Read MoreWhat is the difference between selenium WebDriver and TestNG?
WebDriver is a web automation framework which allows us to execute test across various browsers. It also allows us to create the test scripts in any programming language we want. WebDriver makes direct calls to the browser using each browser’s native support for automation.TestNG stands for Test Next Generation. It is an automation testing framework and uses annotations. Annotations are lines of code that control how the method below it will execute. The greatest advantage of TestNG is that we can generate test reports and know the number of scripts passed, failed or skipped. Failed test cases can be run ...
Read MoreCan we use WHERE, AND & OR in a single MySQL query?
Yes, we can use all of them in a single query. Let us first create a table −mysql> create table DemoTable ( StudentId int, StudentFirstName varchar(20), StudentLastName varchar(20), StudentAge int ); Query OK, 0 rows affected (0.53 sec)Insert records in the table using insert command −mysql> insert into DemoTable values(100, 'John', 'Smith', 23); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(101, 'Carol', 'Taylor', 24); Query OK, 1 row affected (0.62 sec) mysql> insert into DemoTable values(103, 'John', 'Doe', 22); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable ...
Read MoreJava DatabaseMetaData getDriverVersion() method with example
The getDriverVersion() method of the DatabaseMetaData interface returns the version of the JDBC driver used.To get the version of the JDBC driver used to connect with the database.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, as String variables.Get the DatabaseMetaData object with respect to the current connection using the getMetaData() method of ...
Read MoreDisplay first selected row in MySQL?
You can use ORDER BY for this. Let us first create a table −mysql> create table DemoTable ( Value int ); Query OK, 0 rows affected (0.20 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(20); Query OK, 1 row affected (0.07 sec) mysql> insert into DemoTable values(8); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values(18); Query OK, 1 row affected (0.07 sec) mysql> insert into DemoTable values(11); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values(9); Query OK, 1 row ...
Read MoreHow to select more than one row at a time in a JTable with Java?
To select more than one row in a JTable, use the setRowSelectionInterval() method. Here, set the indexes as interval for one end as well as other end.For multiple rows in a range, set the range. Here, we are selecting rows from index 1 to index 2 i.e. two rows −table.setRowSelectionInterval(1, 2);The following is an example to select more than one row at a time in a JTable −Examplepackage my; import java.awt.Color; import javax.swing.BorderFactory; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.ListSelectionModel; import javax.swing.border.TitledBorder; public class SwingDemo { public static void main(String[] args) { JFrame ...
Read MoreWhat is JSON wire protocol in selenium?
To understand we need to first have a fair idea of what JSON actually is, JSON stands for Java Script Object Notation. Now let's have a look at what a sample JSON input looks like −{ "name": "Tutorials Point", "topic": "Selenium", "Address": "India" }JSON today is one of the most widely used and accepted method for communication of heterogeneous system. JSON is used a lot in web services in REST and has been a strong competition to XML.Let’s understand how Web driver uses it when testing the web applications −WebDriver uses JSON as a medium to communicate ...
Read MoreMySQL query to divide column by 100?
Let us first create a table −mysql> create table DemoTable ( Number float ); Query OK, 0 rows affected (0.47 sec)Insert records in the table using insert command −mysql> insert into DemoTable values(1000); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(1); Query OK, 1 row affected (0.27 sec) mysql> insert into DemoTable values(10); Query OK, 1 row affected (0.30 sec) mysql> insert into DemoTable values(100); Query OK, 1 row affected (0.24 sec) mysql> insert into DemoTable values(390); Query OK, 1 row affected (0.09 sec)Display all records from the table using select statement −mysql> ...
Read MoreCombine columns before matching it with LIKE in a single query in MySQL?
You can use CONCAT() function for this. Let us first create a table −mysql> create table DemoTable ( Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, Value1 varchar(10), Value2 varchar(10) ); Query OK, 0 rows affected (0.21 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Value1, Value2) values('10', '345'); Query OK, 1 row affected (0.07 sec) mysql> insert into DemoTable(Value1, Value2) values('14', '789'); Query OK, 1 row affected (0.06 sec) mysql> insert into DemoTable(Value1, Value2) values('18', '234'); Query OK, 1 row affected (0.13 sec)Display all records from the table using ...
Read MoreWhat is the difference between Proof of Work and Proof of Stake?
Bitcoin is the first and foremost cryptocurrency ever created. It is the digital currency which is created, used and maintained electronically. The transactions of a digital coin are written in Blocks and maintained in the Block Chain, which is a distributed, transparent and digital ledger.During the process of mining the Bitcoins, the miners (computer nodes with high power graphic processors) of the network solve the hash algorithms, difficult math problems and mine a block to earn bitcoins as reward. This is how Bitcoins come into market.What is Proof of WorkThe original idea of Proof of Work belong to Cynthia Dwork ...
Read More