Java Programming Tutorials

Java Programming Tutorials And Articles
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Here is a file splitter made in java . try it with files. Don't try it with directory. It will not respond in the way u want. Splitter class import java.io.*; class Splitter { public static void main(String args) throws IOException { takeInput(args);
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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...
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When many items of data of the same class or type have to be stored, it is more efficient to use an array than separate variables or objects. For example, if the temperature on each day of the (non-leap) year had to be stored, rather than set up tempjan1, tempjan2... tempdec31 (365 variables)...
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Compiler Problems 1. 'javac' is not recognized as an internal or external command, operable program or batch file If you receive this error, it means that Windows is not able to find the compiler (javac). Here's one way to tell Windows where to find javac. Set the PATH as follows on...
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There are four types of JSP tags, which are important and often required. 1. Directives These types of tags are used primarily to import packages. Altenatively you can also use these tags to define error handling pages and for session information of JSP page. <%@page language="java" %> ...
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JSTL is a collection of tags similar to HTML that lets you produce dynamic web pages without needing to learn Java. Why JSTL? JavaServer Pages (JSP) technology makes it easy to embed bits of Java code (or scriptlets) in HTML documents. This solution, however, may not be suitable for all HTML...
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In the first part I discussed about applet fundamentals as to what is an applet, its features, various methods of Applet class and a simple example on applet. In this article I will discuss further on advanced features of applet. Applet class Applet class provides all necessary support for...
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In this article I will discuss about window and some advanced components which can be added to our window such as Menu Bars and Menus. Window Fundamentals The AWT defines windows according to a class hierarchy that adds functionality and specificity with each level. The two most common...
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Introduction The instances of the String class represent a string that cannot be modified. If we do want to create modifiable strings because we are going to do lots of string manipulation, we should use the java.lang.StringBuffer and java.lang.StringBuilder classes.If we choose to do a lot of...
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All the three keywords final, finally and finalize() plays a very important role in JAVA. Final is a keyword used for declaration of variable which cannot be edited, finally is a segment of code used for code cleanup in case of an exception whereas finalize is a method used for object cleanup...
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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...
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The Decimal Format class is not very well documented, so I will try and exmplain it with an example. Firstly, you need to import the DecimalFormat class: import java.text.DecimalFormat; Create an instance the format object. This object can be used with doubles, as it uses a decimal. It uses a...
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How do I instantiate a bean whose constructor accepts parameters using the useBean tag? Replacing Characters in a String? Searching a String? Connecting to a Database and Strings Handling? What is a transient variable?
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What is an EJB? An Enterprise JavaBean (EJB) is a reusable, portable J2EE component. EJBs consist of methods that encapsulate business logic. For example, an EJB may have business logic that contains a method to update customer data in a database. A variety of remote and local clients can invoke...
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Introduction In the last article on servlet, we noted that HTTP is the protocol most-commonly used to communicate with web applications. Unfortunately, HTTP offers no mechanism for data to be retained between requests; in other words it can't track the activities of a user across requests. ...
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Some Examples are same from Java AWT Reference and is because when I did those in my college days referred many sources. Introduction Graphics in any language gives a wonderful look and feel to the users as well as programmers. Programmers draw figures, strings etc with the help of...
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In the previous two articles I discussed all essential features and methods of applet. Here I give some examples which would clear your concept about applets. A Font List Example This is an example of an applet that displays the standard fonts and styles. import java.applet.*; import...
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In the previous article Basic Graphics In Java With Examples I explained the methods of graphics class available for drawing various types of figures. In this article I will carry forward the graphics class with the methods it provides to work with those figures, methods available for working with...
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Parts so far Java Event Handling (Part-1) In the previous article I presented the basic concepts and ideas about Event handling in java. In this article I will discuss about mouse event handling. Firstly let me familiarize you with the various mouse events. MouseEvent Class There are...
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Layout Managers In the previous article I discussed about the various Controls in Java like Button, Checkbox, Lists, Scrollbars, Text Fields, and Text Area etc. All of these components have been positioned by the default layout manager. A layout manager automatically arranges the controls within...
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