Java Programming Tutorials

Java Programming Tutorials And Articles
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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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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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The exception handling mechanism is a cleaner way to impose check upon the conditions which may lead to errors. But you should not be carried away by it and start using exception handling anywhere and everywhere you want. Exceptions must be carefully planned and implemented. The following cases...
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Earlier in client- server computing, each application had its own client program and it worked as a user interface and need to be installed on each user's personal computer. In web applications we mostly use HTML/XHTML which is mostly supported by all the browsers and web page is displayed to the...
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Struts is a free open-source framework for creating Java web applications. Web applications differ from conventional websites in that web applications can create a dynamic response. Many websites deliver only static pages. A web application can interact with databases and business logic engines...
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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...
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Exception is an abnormal condition that arises in the program during execution. When such a condition arises in the program, an appropriate code is written so that it can be handled. It is very much similar to the error codes returned by a subroutine in the C language. Whatever value the function...
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The problem occurred when i was developing this app was that the connection of the phone with the computer. For this connection to work over the Wifi network the user must enter the correct IP address of the phone/computer. It's a bit of a downfall when it comes to the users side since there can be...
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The finally clause is written with the try-catch statement. It is guarenteed to be executed after a catch block or before the method quits. try { // statements } catch (<exception> obj) { // statements }
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Java, has become now undoubtedly the fuel of the development of the Software System Technology.Developers, now thus take the challenge to prove the feelings of Java as the best positive catalyst of their development life's reactions.They feel the Class, as the ultimate classic sense of the...
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A specific instant in time is represented with millisecond precision by the Date class. Date is interpreted as year, month, day, hour, minute, and second values using this class. But API for functions of this class was not so flexible and hence was not supported at international level. Also for JDK...
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Before we understand what Java Serialization is, first we need to understand what serialization means? In computer science, in the context of data storage, serialization is the process of translating data structures or object state into a format that can be stored and reconstructed later in the...
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Since JDK version 5.0, a new mechanism was introduced in Java that enables us to include additional information (known as metadata) directly into the java source code. This information is termed as Annotations. In English dictionary, Annotation means a note by way of explanation or comment added...
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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 8 is the major release after the release of Java 5 that significantly improved the Java language. It has introduced many cool new features. One of them is the Default and Static methods in interfaces. This feature has reduced the burden of modifying the implementation classes of existing...
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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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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 Runtime Environment uses classloaders to load classes dynamically into the Virtual Machine for execution. A class is a blueprint or a definition which represents a similar kind of objects. It describes the behavior of the objects of its type. In other words, It can be expressed as a named unit...
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JDBC (Java Database Connectivity) is an API (Application Programming Interface) which is used to connect java to any database. It is used to communicate with various types of databases such as Oracle, MS Access, My SQL and SQL Server. It is a platform-independent interface between Java and...
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