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 2485 of 2547
How to change display mode with Java Swings
To change display mode with Java Swings, use the setDisplayMode() method. Here, we have set the Display mode as:new DisplayMode(800, 600, 32, 60));Now, when you will run the program, the frame would be visible in a different resolution than the actual set resolution of your system.The following is an example to change display mode with Java Swings:Exampleimport java.awt.DisplayMode; import java.awt.GraphicsDevice; import java.awt.GraphicsEnvironment; import javax.swing.JFrame; public class SwingDemo { public static void main(String[] args) { JFrame frame = new JFrame(); frame.setSize(800, 600); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); GraphicsDevice graphics = GraphicsEnvironment.getLocalGraphicsEnvironment() ...
Read MoreHow to filter String list by starting value in Java?
Let’s first create a String list −List list = new ArrayList(); list.add("wxy"); list.add("zabc"); list.add("ddd2"); list.add("def"); list.add("ghi"); list.add("wer"); list.add("uij"); list.add("wqy");To filter String list by starting value, use filter() and startsWith() −list.stream().filter((b) -> b.startsWith("w"))The following is an example to filter string list by starting value −Exampleimport java.util.ArrayList; import java.util.List; public class Demo { public static void main(final String[] args) { List list = new ArrayList(); list.add("wxy"); list.add("zabc"); list.add("ddd2"); list.add("def"); list.add("ghi"); list.add("wer"); list.add("uij"); list.add("wqy"); ...
Read MoreDelete the first 10 characters from JTextArea in Java
Let’s say the following is our JTextArea with default text −JTextArea textArea = new JTextArea("The text added here is just for demo. " + "This demonstrates the usage of JTextArea in Java. In this example we have" + "deleted some text.");Now to remove the first 10 characters, use replaceRange() method and set null from one end to another i.e. deleting characters in a range. The replaceRaneg() method Replaces text from the indicated start to end position with the new text specified i.e.e here null will replace the first 10 characters −int start = 0; int end = 10; ...
Read MoreHow to Read data from BLOB and CLOB type columns from a table using JDBC?
Clob datatypeCLOB stands for Character Large Object. in general, an SQL Clob is a built-in datatype which is used to store large amount of textual data. Using this datatype, you can store data up to 2, 147, 483, 647 characters. MYSQL database provides support Clob datatype TINYTEXT, TEXT, MEDIUMTEXT, LONGTEXT.The java.sql.Clob interface of the JDBC API represents the CLOB datatype. Since the Clob object in JDBC is implemented using an SQL locator, it holds a logical pointer to the SQL CLOB (not the data).Reading Data from a column of datatype ClobYou can read CLOB value (character stream data) from a ...
Read MoreHow to write data into BLOB and CLOB type columns in a table using JDBC?
CLOB stands for Character Large Object. in general, an SQL Clob is a built-in datatype which is used to store large amount of textual data. Using this datatype, you can store data up to 2, 147, 483, 647 characters. MYSQL database provides support Clob datatype TINYTEXT, TEXT, MEDIUMTEXT, LONGTEXT.The java.sql.Clob interface of the JDBC API represents the CLOB datatype. Since the Clob object in JDBC is implemented using an SQL locator, it holds a logical pointer to the SQL CLOB (not the data).Inserting Data into a column of Clob typeYou can insert a CLOB type value using the setCharacterStream() or, ...
Read MoreHow can I filter string value with starting letter?
Let’s say the following is our String List −List list = Arrays.asList("Jonny", "David", "Tony", "Jacob", "Smith", "Bravo", "Gayle", "John");Now filter the string value with starting letter −Stream stream = list.stream().filter(name -> name.startsWith("J"));The following is an example to filter string value with starting letter −Exampleimport java.util.Arrays; import java.util.List; import java.util.stream.Collectors; import java.util.stream.Stream; public class Demo { public static void main(String[] args) { List list = Arrays.asList("Jonny", "David", "Tony", "Jacob", "Smith", "Bravo", "Gayle", "John"); System.out.println("List with elements..."); for (String res : list) { System.out.print(res+" ...
Read MoreJava Program to create Arrow Button positioning North
To create Arrow Button at position north, use BasicArrowButton:BasicArrowButton arrow = new BasicArrowButton(BasicArrowButton.NORTH);Above, we have set the arrow to NORTH. Now add it to Panel:panel.add(arrow, BorderLayout.NORTH);The following is an example to create Arrow Button positioning North:Exampleimport java.awt.BorderLayout; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.plaf.basic.BasicArrowButton; public class SwingDemo extends JPanel { public SwingDemo() { setLayout(new BorderLayout()); JPanel panel = new JPanel(new BorderLayout()); add(panel, BorderLayout.EAST); BasicArrowButton arrow = new BasicArrowButton(BasicArrowButton.NORTH); panel.add(arrow, BorderLayout.NORTH); } public static void main(String[] args) { JFrame frame = ...
Read MoreHow to Map IntSteam to String object in Java
To Map IntStream to String object, use mapToObj and within that set the values −.mapToObj(val -> "z" + val)Before that, we used range() on IntStream −IntStream.range(1, 10)The following is an example to map IntStream to String object in Java −Exampleimport java.util.stream.IntStream; public class Demo { public static void main(String[] args) throws Exception { IntStream.range(1, 10) .mapToObj(val -> "z" + val) .forEach(System.out::println); } }Outputz1 z2 z3 z4 z5 z6 z7 z8 z9
Read MoreCan we select only some of the text in JTextArea?
Yes, we can do that using built-in methods of JTextArea components. Let’say the following is our JTextArea −JTextArea textArea = new JTextArea("This is a text displayed for our example. We have selected some of the text.");Now, use the methods setSelectionStart() and setSelectionEnd() to select some text in a range −textArea.setSelectionStart(5); textArea.setSelectionEnd(20);The following is an example to select some of the text in a JTextArea −Examplepackage my; import java.awt.GridLayout; import javax.swing.*; public class SwingDemo { SwingDemo() { JFrame frame = new JFrame("Demo"); JTextArea textArea = new JTextArea("This is a text displayed for our example. ...
Read MoreHow to get the list of all drivers registered with the DriverManager using JDBC?
The java.sql.DriverManager class manages JDBC drivers in your application. This class maintains a list of required drivers and load them whenever it is initialized.Therefore, you need to register the driver class before using it. However, you need to do it only once per application.One way to register a driver class object to Driver manager is the registerDriver() method of the DriverManager class. To this method you need to pass the Driver object as a parameter.//Instantiating a driver class Driver driver = new com.mysql.jdbc.Driver(); //Registering the Driver DriverManager.registerDriver(driver);List of all the DriversYou can get the list of all the drivers registered ...
Read More