Getting URL from URN As the name indicates, the InetAddress of java.net package refers a Web server address in Internet. We know earlier, URN (Universal Resource Name) is easier to remember than URL (Universal Resource Locator). With InetAddress, we can get a lot of information of a Web server. In the following program, when URN …
Networking Tutorial Port Protocol Summary: Networking is a big subject with confusing general concepts like port number and protocol etc. for a beginner. These concepts are explained in simple terms in this "Networking Tutorial Port Protocol". Networking is the process of connecting different computer devices like printers and systems to make it convenient for communication …
Multithreading Tutorial Introduction Comparative to other languages, multithreading is very easy and simple in Java and the credit goes to the portability nature and support of many Java API classes. The built-in support for threads is simple and straight so that any programmer can do with multithreading operations without confusion and special attention. Multithreading uses …
class System Introduction The java.lang.System class comes with many static methods and mainly intended to communicate with the underlying operating systems. Using these methods, it is possible to take keyboard input (using System.in), knowing system time (using currentTimeMillis()), copying an array elements into another (using arraycopy()), to advise to go for garbage collection (using gc()) …
We have seen earlier, shallow copying is easier and deep copying takes more time, especially, when properties (variables) are many. Here comes another way of copying, cloning. In cloning, object to object is assigned, but at the same time encapsulation is maintained. Both objects occupy two different locations; that is, cloning creates a duplicate object …
Java Array Copying arraycopy method Summary: Java is simple to practice and one example is arraycopy() method. Illustrated in this tutorial "Java Array Copying arraycopy". Java makes it easier to copy array elements into another either totally or a few. To copy, the System class includes arraycopy() method whose signature is given below. public static …
Introduction The java.lang.Math class includes many methods with which many simple arithmetic operations can be done like finding the square root, rounding, trigonometric and logarithm functions. As these methods are defined as static, they can be used directly by the programmer without the trouble of creating an object. Following is the class signature as defined …
Animation is very easy in Java and it is the place where you can prove Java is a simple language to practice. Flickering is a very big constraint in animation coding and techniques of overcoming is illustrated. Java Animation Flickering is discussed elaborately with screenshots. Introduction to Java Animation Flickering Animation, an inevitable feature of …
Jagged Arrays Varying Column Size Arrays Summary: In this tutorial "Jagged Arrays Varying Column Size Arrays", you will learn how to create arrays with different column sizes. It is a new feature supported by Java. In Jagged arrays, each row, in a two-dimensional array, may contain different lengths. Let us design a two-dimensional array with …
Java One Dimensional Arrays Declaring an array is the same way of declaring a variable but with an extra square brackets. To inform the compiler, that the variable represents an array, suffix or prefix (Java allows) the variable name with a pair of square brackets. Array size should be given at the time of creation …
Two Dimensional Arrays (Array of Arrays) To inform the compiler that it is a two dimensional array, place two pairs of square braces either as prefix or suffix to array object. We can place any number of one dimensional arrays in a two dimensional array. A C/C++ programmer is much aware of "a two dimensional …
Java comes with many built-in multimedia capabilities. Java includes many classes and methods specially designed for drawing images and animation in both applications and applets. Drawing an image on applets, quiet varies, from drawing on applications. Two programs are given showing the way of drawing images on applets and applications. 1. Draw Images Example Java …
A package is a collection of predefined classes and interfaces, generally, having some common functionality (purpose). A package of Java is equivalent to a header file of C/C++. All the packages put together, that comes with JDK software, are known as Java API. The most important package of Java API is java.lang because without it …
Access Specifiers Modifiers are different. Specifier specifies access and modifier modifies access. A very confusing for a Beginner. Expalained Simple terms. Java supports both specifiers and modifiers that can dictate the access. An access specifier can be applied to any identifier like variables, methods and classes but modifiers cannot be applied to every identifier, there …
Canceling a Thread Sometimes, the programmer may require killing a thread from any state. One example of such a situation is if the thread is taking an unusual time to complete a task which the programmer cannot bear, it is the time for him to kill the thread. This is more observed in Web servers. …
Introduction to Thread Lightweight Heavyweight Java If only one process exists before the processor and if the process execution is stopped for some reason, the microprocessor becomes idle without any work. This type of programming is known as monolithic programming. In monolithic programming, the whole process constitutes a single module. To get a better understanding, …
Introduction to Java Multimedia Image Animation Multimedia is becoming inevitable for a common man today or to a programmer. The term multimedia includes the integration of many aspects like audio, video, graphics, images and animation. Multimedia recorded once can be played any number of times at the user's choice. For this, the computer system should …
Exception handling makes a language robust. This Exceptions Tutorial for Beginners explains concepts in Simple terms Examples Screenshots. Go on reading. The programmer faces two types of problems in coding – problems arising at compile-time and problems arising at runtime. Regarding compile-time problems or mistakes the compiler takes care of and ultimately does not compile …
Thread Synchronization Deadlock Summary: By the end of this tutorial "Thread Synchronization Deadlock", you will come to know what is deadlock and how to avoid it. Synchronization is explained in simple terms and code. Start reading. Introduction Thread Basics Generally, one thread accesses one source of data (or to say, its own source) like your …
Create Lightweight Heavyweight Threads Summary: In this tutorial "Create Lightweight Heavyweight Threads", you will create both lightweight and heavyweight threads in simple terms, programs and screenshots. We know earlier, the meaning of heavyweight and lightweight threads in in Java Thread Basics with figures. Now, let us see how to create them. 1. Creating Heavyweight Threads …