Java Programming Tutorials

	Title / Author	Replies Views
	Multi-dimensional arrays in Java ( 1 2 3 ... Last Page) 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... By pradeep Last Message By Healthcare	37 541,181
	Object Cloning in Java 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... By pradeep Last Message By javaexp	8 216,834
	Creating a Java Thread by implementing Runnable Interface We can create a thread in Java by extending Thread Class. A better way to create a thread in Java is to implement Runnable interface. A thread can be created by extending Java Thread class also. Now the question arises why implementing Runnable interface is a better approach? Answer is, if the... By Sanskruti Last Message By prabhas4	4 144,245
	Wrapper Class In Java ( 1 2) 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... By techgeek.in Last Message By Balaji Reddy	13 102,732
	EJB 3.0 Stateful Session Bean Example This article demonstrates how to write a simple Stateful Session Bean. It consists of three POJO's: Remote interface Cart.java, Bean class CartBean.java and EJB client CartClient.java. Prerequisites In order to complete the example application, you should be familiar with the following: *... By Sanskruti Last Message By Sujata420	7 70,821
	A Simple Java Applet An Applet is a small program that can be sent across the Internet and interpreted on a client machine. To give permission for remote access it must be a public class. Typically it is a class that inherits and/or defines a special set of functions needed to run an applet. These are part of the class... By pradeep Last Message By pradeep	2 63,269
	Using Java's Net::URL Class To Access URLs ( 1 2) 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... By pradeep Last Message By fiverivers	13 58,376
	An approach to LDAP with Java LDAP - The Lightweight Directory Access Protocol This directory access protocol which can either act as a gateway to other service or provide service itself. LDAP follows standardized way of managing directory information solutions of X.500. The Lightweight Directory Access Protocol, better... By thiruganeshkumar@gma Last Message By pradeep	1 56,617
	Java digital clock 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 { ... By Systemerror Last Message By rkudoz	6 54,712
	Type Conversion in Java Automatic Conversion In Java type conversions are performed automatically when the type of the expression on the right hand side of an assignment operation can be safely promoted to the type of the variable on the left hand side of the assignment. Thus we can safely assign: byte -> short -> int... By pradeep	0 49,226
	'Main' Thread in Java Introduction The 'main()' method in Java is referred to the thread that is running, whenever a Java program runs. It calls the main thread because it is the first thread that starts running when a program begins. Other threads can be spawned from this main thread. The main thread must be the... By Sanskruti Last Message By swaran	4 37,518
	Send Receive Mails in Java with JavaMail The JavaMail API (http://java.sun.com/products/javamail/) is a messaging framework intended to build platform-independent applications that use e-mail messaging. It is included in the J2EE platform and is available as an optional package in J2SE. The API's main purpose is not for transporting,... By Mary	0 29,382
	Initialization block in JAVA An initialization block is a block of code between braces that is executed before the object of the class is created. As the execution of the initialization block is dependent on the creation of the object we can easily make a guess that it has two types of object. 1. Non static initialization... By shabbir Last Message By Balaji Reddy	1 28,528
	Using Regular Expressions in Java ( 1 2) 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... By pradeep Last Message By elec.shabnam	13 26,265
	Putting an Image on your Java applications. ( 1 2) 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... By Systemerror Last Message By tiwvinay	14 25,524
	Constructors in Java Every class has at least one it's own constructor. Constructor creates a instance for the class. Constructor initiates something related to the class's methods. Constructor is the method which name is same to the class. But there are many difference between the method s and the Constructor.In this... By Sanskruti Last Message By Healthcare	3 24,950
	How to throw Exceptions in Java? Before you can catch an exception, some code somewhere must throw one. Any code can throw an exception: your code, code from a package written by someone else such as the packages that come with the Java platform, or the Java runtime environment. Regardless of what throws the exception, it's always... By Sanskruti	0 24,895
	Creating a Java Thread by extending Thread Class A thread can be created in Java programs in two ways – by extending Thread class and by implementing Runnable interface. In case, where the class extends a Tread class, it must override run() method of the Thread class. The program may override the other methods also. If the program uses Runnable... By Sanskruti	0 23,033
	Multiple 'catch' clauses in Java Introduction The code bound by the try block need not always throw a single exception. If in a try block multiple and varied exceptions are thrown, then you can place multiple catch blocks for the same try block in order to handle all those exceptions. When an exception is thrown it traverses... By Sanskruti	0 21,555
	Buffers in Java Introduction Buffers can be very useful in Java since they speed up I/O operations considerably. Basically a buffer is a space allocated in memory for Bytes, Chars, and other data types to be stored. Buffers are really useful while writing Client/ Server applications. Creating a Buffer A... By decodec Last Message By pradeep	4 21,401