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Tutorial on Java classes and objects

on December 11, 2025

+ Tutorial on Java classes and objects!

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Tutorial on coding and best practices

on November 17, 2025

+ Tutorial on coding and best practices!

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Tutorial and CHEAT SHEET for java List interface, LinkedList and ArrayList

on October 21, 2025

+ LinkedList and ArrayList Tutorial and CHEAT SHEET for java! List interface

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Tutorial on Atomicity with Java Programming Language

on September 28, 2025

+ Tutorial on Atomicity with Java Programming Language!

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Nagasharath Kopalle

All Posts

2011 5
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2015 2
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2025 4
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Every Java programmer must read books!
Evolution of Java Programming Language!
Internals of JVM!
LinkedList and ArrayList
Send SMSs with Java!
Tutorial and CHEAT SHEET for java! List interface
Tutorial on Agile Methodology with SCRUM Framework Basics!
Tutorial on Apache Commons Exec API for executing exe files from java program!
Tutorial on API for executing exe files from java program.!

Tutorial on Atomicity with Java Programming Language!
Tutorial on coding and best practices!
Tutorial on controlling an executable from Java program!
Tutorial on DesignGridLayout: Simple
Tutorial on Eclipse Java Editor Shortcuts!
Tutorial on Exception handling and java keywords!
Tutorial on File IO operations with Java programming language!
Tutorial on File Manager/File Explorer with Swing JTree Compone!nt
Tutorial on Java - Swing custom components - Rounded JButton!
Tutorial on Java and OOPS concepts!
Tutorial on Java API support for Exception Handling!
Tutorial on Java classes and objects!
Tutorial on Java desktop GUI!
Tutorial on java GridLayout: fill the form with gridlayout!
Tutorial on Java IDE for Learners: BlueJ!
Tutorial on Java Immutable objects and mutable objects with an example!
Tutorial on java JColorComboBox: JComboBox as Color Chooser!
Tutorial on Java Multi threaded programming basics with Reentrant lock!
Tutorial on Java Multi threaded programming basics!
Tutorial on Java NullPointerException!
Tutorial on Java programming language and IDEs!
Tutorial on Java Swing JFrame usage demo!
Tutorial on Java Swing JLabel demo with example!
Tutorial on JavaFX: arranging components on GridPane!
Tutorial on JForm: Fill the form with style!
Tutorial on launching Swing GUI always in a dedicated Thread!
Tutorial on Simple program which demonstrates Swing/AWT Grid layout!
Tutorial on swapping two numbers!
Tutorial on Swing Components!
Tutorial on Swing Containers and Controls!
Tutorial on WMI - Windows Management Instrumentation!
yet powerful Layoutmanager for arranging swing components!

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Evolution of Java Programming Language

Evolution of Java:&#x0016 First of all, The Java programming language and it's tools that we currenly using is not what actually expected. This language started as a project to give solutions for embedded devices, mobile phones and other portable peripherals. Initially, the Java was called Oak. Why it is Oak first..? and Why it transformed to Java...? The team of five technocrats including Dr. James Gosling and also known as Dr. Java, together working on a project, which expected to give solutions on embedded devices, portable smart devices and TV Set top Boxes etc. at Sun Micro Systems. In the process of achieving this solution, at their breaktime, team used to relax with a coffee by having a glimpse on a scenery of Oak tree next to their facility. Once the project has come to conclusion and in the process of giving a title to it, they noticed the Oak trees [Always observing them in their break time], they named this programming language as Oak. Oak Logo Why it ...

Tutorial on DesignGridLayout: Simple, yet powerful Layoutmanager for arranging swing components

Swing toolkit comes with few standard Layout Managers where none of them serves the need of arranging components in a way that usually developers require. some of them does, but it takes lot of coding time to achieve it. GridBagLayout is the most flexible layout manager available in swing toolkit but their are so many variables that developer has to look after. DesignGridLayout can be a useful LayoutManager to arrange components in less time with very small snippet of code and can still get proper alignment. Layouting with DesignGridLayout is as easy as coding with various GUI Builder tools available in varoius IDEs. Simple program which demonstrates DesignGridLayout: import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JSeparator; import javax.swing.JTextField; import javax.swing.SwingUtilities; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; import net.java.dev.designgr...

Tutorial on java JColorComboBox: JComboBox as Color Chooser

　 Swing toolkit provides a component called JColorChooser to choose colors. It allows users to select color from multiple color combinations. Some times our application may need simple component with an option to select only basic colors/ less number of color options unlike sepearate dialog with too may color options[JColorChooser]. This JColorComboBox may serve the need. I wanted my color chooser to behave like JComboBox. The popup shows all 12 colors and their names, among all of them one color can be choosen. see the below image. I created two classes 1. JColorComboBox 2. ColorRenderer JColorComboBox extends the JComboBox and ColorRenderer extends JLabel and implements ListCellRenderer. import java.awt.Color; import java.awt.Component; import java.awt.Font; import java.util.Enumeration; import java.util.Hashtable; import javax.swing.*; /** * * @author sharath */ public class JCol...

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