Java Programming Tutorials

Java Programming Tutorials And Articles
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Multi-dimensional arrays Java, as with most languages, supports multi-dimensional arrays - 1-dimensional, 2-dimensional, 3-dimensional, ... This discusses 2-dimensional arrays, but the same principles apply to higher dimensions. 2-dimensional arrays 2-dimensional arrays are usually...
1. How can you store a copy of an object at the same time other threads may be changing the object's properties? Choice 1 Override writeObject() in ObjectOutputStream to make it synchronized. Choice 2 Clone the object in a block synchronized on the object and serialize the clone. Choice 3...
I often hear people asking on how to put an image on Java applications, thus here is an example of a painted panel that has an image in the same directory as the application *note* you cant use windows bmp with Java, but once you start creating your own images it's a good time to note that their...
Introduction This component is suitable to convert a well-formed html with/without inline CSS to a PDF file. HTML to PDF Converter is a tool to convert HTML to PDF. HTML to PDF Converter accurately transforms well-formed HTML with or without inline cascading style sheets into PDF...
Using Regular Expressions in Java JDK versions 1.4.0 and later have comprehensive support for regular expressions through the standard java.util.regex package. Because Java lacked a regex package for so long, there are also many 3rd party regex packages available for Java. I will only discuss...
Java's networking classes enable you to implement applications that communicate across a network/remote connection, but the platform also extends into the realm of the Internet and URLs. Java's URL class makes accessing Web resources as easy as accessing a local file. Let's take a look at how you...
Java is an object-oriented language and as said everything in java is an object. But what about the primitives? They are sort of left out in the world of objects, that is, they cannot participate in the object activities, such as being returned from a method as an object, and being added to a...
Introduction The solution is mainly used in Error website wherein you have to generate reports which gives the number of solutions uploaded in a specific period(Reports by calendar) or the number of solutions posted by particular employee (reports by employee id). Background My...
Introduction A package is a namespace that organizes a set of related classes and interfaces to provide access protection and namespace management.You can think of packages as being similar to different folders on your computer. Software written in the Java programming language can be...
Objects in Java are referred using reference types, and there is no direct way to copy the contents of an object into a new object. The assignment of one reference to another merely creates another reference to the same object. Therefore, a special clone() method exists for all reference...
This article continues our exploration of the Abstract Window Toolkit (AWT). It examines the standard controls defined by Java. Controls are components that allow a user to interact with your application in various ways—for example; a commonly used control is the push button. The AWT supports...
A thread, by definition is a light weight process. They are used to increase functionality and performance by performing multiple tasks at the same time, i.e. concurrently. There are two methods for implementing threads in Java, Implementing an interface Extending a class I'd assume that...
JNode, a "Java New OS Design Effort" is an open source all java operating system. It is a modern OS with support for modern hardware devices intended to be simple to use, install & maintain on personal devices such as desktops, tablet pcs and handhelds. JNode has started out many years ago as...
This article demonstrates how to write a simple Stateful Session Bean. It consists of three POJO's: Remote interface, Bean class and EJB client Prerequisites In order to complete the example application, you should be familiar with the following: *...
Google pagination used to find initial and final index for the search done using google3 for website application. import net.sf.gsaapi.GSAClient; import net.sf.gsaapi.GSAQuery; import net.sf.gsaapi.GSAResponse; import net.sf.gsaapi.GSAQuery.GSAQueryTerm; import...
Introduction This Code snippet is used to capture Screenshot automatically and save it. The below code performs the function of taking screenshots automatically making use of the class java.awt.Robot .The package java.awt contains all of the classes for creating user interfaces and for...
Introduction Java can be used to create two types of programs: applications and applets. An application is a program that runs on a computer, under the operating system of that Computer just like the one created using C or C++. An applet is an application that is accessed on the...
Comparing Strings To compare strings function equals() is used. String str1 = "XYZ"; String str2 = "xyz"; boolean result = str1.equals(str2); boolean result2 = str1.equalsIgnoreCase(str2);Output
This is a basic digital clock in Java that works off your operating system time, it works in a multithreaded environment and have coded it to put my own background in. import java.awt.*; import javax.swing.*; import java.util.*; class Clock extends JFrame implements Runnable { ...
The String class is used to manipulate character strings that cannot be changed. In simple terms, objects of type String are read only and immutable. The StringBuffer class is used to represent characters that can be modified. The significant performance difference between these two classes is that...