Java Programming Tutorials

Java Programming Tutorials And Articles
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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...
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Java defines several built-in classes for exception handling. All these classes are a part of the java.lang package which is automatically imported. That is why, while throwing an exception you did not specifically include any package for exception classes. Apart from the built-in exception...
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Introduction A pattern of special characters is used to specify the format of the date. The example below demonstrates some of the characters. For a complete listing, see the javadoc documentation for the SimpleDateFormat class. Note: This example formats dates using the default locale...
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The classical input/output (I/O) library in Java contains classes that support I/O handling of streams with compressed data. You can easily compress and decompress any text or binary data to or from any I/O stream using either a file or any other stream (e.g., a servlet output stream). In this...
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Here, these two codes are used to shows the difference between normal MultiThreading and Synchronized Multithreading. Notice, see the difference in the starting and finishing of all the threads in both the code and try to find why every time when you run the program code, random thread starts...
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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: *...
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Java.io package provides classes for system input and output through data streams, serialization and the file system. Some of important and popular classes of java.io package are given below: Java.io.BufferedInputStream Class Java.io.BufferedOutputStream Class Java.io.BufferedReader Class...
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Java.lang package contains the classes that are fundamental to the design of the Java programming language. Java.lang.Character Class Java.lang.Float Class Java.lang.Integer Class Java.lang.Character Class The java.lang.Character class wraps a value of the primitive type char in an...
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Java.util package contains the collections framework, legacy collection classes, event model, date and time facilities, and miscellaneous utility classes. Java.util.ArrayList Class Java.util.Calendar Class Java.util.HashMap Class Java.util.ArrayList Class The java.util.ArrayList class...
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Introduction The code which is expected to generate the exception must be enclosed in the try and catch block. The very basic form of the exception-handling block is as following: try { //code which is expected to generate the exception } catch (<ExceptionTypeClass> object) {...
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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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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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Java has a class called File, which actually represents not a file you can read or write, but rather a filename. Using this class is highly recommended instead of simple strings, because it makes your file naming operating-system independent. You can easily find out wether a filename is relative or...
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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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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...
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Google pagination used to find initial and final index for the search done using google3 for website application. GoogleAppSearch.java import net.sf.gsaapi.GSAClient; import net.sf.gsaapi.GSAQuery; import net.sf.gsaapi.GSAResponse; import net.sf.gsaapi.GSAQuery.GSAQueryTerm; import...
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Drawing Lines The drawLine method belongs to the Graphics class. This example draws a fan of twenty lines from the bottom center of the Applet along the top edge. The applet's getSize method is used to find the dimensions of the applet. import java.awt.*; import java.applet.*; public...
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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...
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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...
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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...
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