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
Programming Articles
Page 2494 of 2547
Java ResultSet last() 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 last() method of the ResultSet interface moves the pointer of the current (ResultSet) object to the last row, from the current position.This method returns a boolean value specifying whether the ResultSet cursor ...
Read MoreHow to set all the Arrow Buttons in a frame with Java?
To set arrow buttons in a frame, let us first create a frame −JFrame frame = new JFrame();Now, set the layout for the frame wherein all the arrow buttons would be displayed −frame.setLayout(new GridLayout(0, 5));Set the arrow buttons for all the locations −frame.add(new BasicArrowButton(BasicArrowButton.EAST)); frame.add(new BasicArrowButton(BasicArrowButton.NORTH)); frame.add(new BasicArrowButton(BasicArrowButton.SOUTH)); frame.add(new BasicArrowButton(BasicArrowButton.WEST));The following is an example to set all the arrow buttons in a frame −Examplepackage my; import java.awt.GridLayout; import javax.swing.Box; import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.plaf.basic.BasicArrowButton; public class SwingDemo { public static void main(String[] args) { JButton button1 = new JButton("One"); ...
Read MoreHow to align multiple buttons with different height in Java?
To align multiple buttons with different height in Java, try the following example, Here, we have set 5 buttons with GridBagConstraints −GridBagConstraints constraints = new GridBagConstraints(); constraints.insets = new Insets(5, 5, 5, 5); constraints.anchor = GridBagConstraints.WEST;In addition, to set different height for different buttons, we have used −component. getPreferredSize().heightThe following is an example to align multiple buttons with different height −Examplepackage my; import java.awt.Dimension; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.Insets; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class SwingDemo { public static void main(String[] args) { final JFrame frame = new JFrame(SwingDemo.class.getSimpleName()); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel panel = new JPanel(new GridBagLayout()); GridBagConstraints constraints = new GridBagConstraints(); constraints.insets = new Insets(5, 5, 5, 5); constraints.anchor = GridBagConstraints.WEST; ...
Read MoreJava ResultSet getRow() 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 getRow() method of the ResultSet interface retrieves the current row number/position of the ResultSet pointer.This method returns an integer value representing the current row number to which the ResultSet pointer points to.ExampleLet us ...
Read MoreHow to work with border layout position options in Java?
Let us see some examples to work with different border layout position options such as PAGE_START, PAGE_END, etc.The following is an example of BorderLayout.PAGE_START option −Examplepackage my; import java.awt.BorderLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JTextArea; import javax.swing.JToolBar; public class SwingDemo { public static void main(String[] args) { JPanel panel = new JPanel(new BorderLayout()); JToolBar toolbar = new JToolBar(); panel.add(toolbar, BorderLayout.PAGE_START); toolbar.add(new JTextArea(" Add name here")); toolbar.add(new JButton("Submit Name")); toolbar.addSeparator(); toolbar.add(new JTextArea(" Add age here")); ...
Read MoreJava ResultSet getMetaData() 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 ResultSetMetaData provides information about the obtained ResultSet object like, the number of columns, names of the columns, datatypes of the columns, name of the table etc…The getMetaData() method of ResultSet interface ...
Read MoreCreate Unit Tuple from another collection in Java
To create Unit Tuple from another collection, use the fromCollection() method.Let us first see what we need to work with JavaTuples. To work with the Unit class in JavaTuples, you need to import the following package −import org.javatuples.Unit;Note − Steps to download and run JavaTuples program. If you are using Eclipse IDE to run Unit Class in Java Tuples, then Right Click Project → Properties → Java Build Path → Add External Jars and upload the downloaded JavaTuples jar file.The following is an example −Exampleimport java.util.*; import org.javatuples.Unit; public class Demo { public static void main(String[] args) { ...
Read MoreHow to create IntSummaryStatistics from Collectors in Java?
Let us first create a List:List emp = Arrays.asList( new Employee("John", "Marketing", 5), new Employee("David", "Operations", 10));We have class Employee with name, department and rank of employees.Now, create summary for the rank like count, average, sum, etc:IntSummaryStatistics summary = emp .stream() .collect(Collectors.summarizingInt(p -> p.rank));The following is an example to create IntSummaryStatistics from Collectors in Java:Exampleimport java.util.Arrays; import java.util.IntSummaryStatistics; import java.util.List; import java.util.stream.Collectors; public class Demo { public static void main(String[] args) throws Exception { List emp = Arrays.asList(new Employee("John", "Marketing", 5), new Employee("David", "Operations", 10)); IntSummaryStatistics summary = emp .stream() .collect(Collectors.summarizingInt(p → ...
Read MoreHow to set/insert null values to in to a column of a row using JDBC program?
You can insert null values into a table in SQL in two ways:Directly inserting the value NULL into the desired column as:Insert into SampleTable values (NULL);Using ‘ ’ as nullInsert into SampleTable values (NULL);While inserting data into a table using prepared statement object you can set null values to a column using the setNull() method of the PreparedStatement interface.pstmt.setNull(parameterIndex, sqlType);ExampleAssume we have a table named cricketers_data in the database with the following contents:+------------+------------+---------------+----------------+-------------+ | First_Name | Last_Name | Date_Of_Birth | Place_Of_Birth | Country | +------------+------------+---------------+----------------+-------------+ | Shikhar | Dhawan | 1981-12-05 | ...
Read MoreHow to change font size with HTML in Java Swing JEditorPane?
Use HTMLEditorKitt to change the font size with HTML. With that, use the JEditorPane setText() method to set HTML:HTMLEditorKit kit = new HTMLEditorKit(); editorPane.setEditorKit(kit); editorPane.setSize(size); editorPane.setOpaque(true); editorPane.setText(" This is a demo text with a different font!");The following is an example to change font size with HTML in Java Swing JEditorPane:Exampleimport java.awt.BorderLayout; import java.awt.Container; import java.awt.Dimension; import javax.swing.JEditorPane; import javax.swing.JFrame; import javax.swing.text.html.HTMLEditorKit; public class SwingDemo extends JFrame { public static void main(String[] args) { SwingDemo s = new SwingDemo(); s.setSize(600, 300); Container container = s.getContentPane(); s.demo(container, container.getSize()); ...
Read More