Generifying your Design Patterns -- Part I: The Visitor Generifying your Design Patterns Part I: The Visitor by Mark Spritzler In the upcoming months, I will be writing a series of articles on Generifying your Design Patterns. We will look at a number of Design Patterns from Singleton, Factory, Command, Visitor, and the Template Method. We will see what we can possibly gain from using generics in our design patterns and how to create them. Some patterns work well with generics, and some just don't make sense. Well, you could argue that none of them make sense. To start off, I have chosen the Visitor pattern, since this is the first one that I attempted to generify. A generic look at Generics So let's start by looking at generics and how to make a class generic. Generics are a way to create a template of your class and allow actual implementations of your template to be type safe. public class MyClass<A, B, C>{} You can use any letters you like. Now, in your class code you can use the letters in place of actual Classes. Erasure An example
Kleine Java-Applets zum Download - Java Applets - Drei Beispiele von aktuell 34 verfügbaren Applets: Begeben Sie sich auf eine Reise durch die unendlichen Weiten des fraktalen Apfelmännchens.Einfach per Mausklick: (Unkomprimiert sieht's noch viel hübscher aus ...) => Apfelmännchen Zoom 2 Suchen Sie einen orginellen Sound-Effekt für Ihre Homepage ? => Morsezeichen-Ticker Oder wollten Sie schon immer mal wissen, wie diese oder jene Funktion aussieht: => Funktionsplotter Java Tutorial Blog Jepp - Java Embedded Python Lesson: Generics (Updated) (The Java™ Tutorials > Learning the Java Language) In any nontrivial software project, bugs are simply a fact of life. Careful planning, programming, and testing can help reduce their pervasiveness, but somehow, somewhere, they'll always find a way to creep into your code. This becomes especially apparent as new features are introduced and your code base grows in size and complexity. Fortunately, some bugs are easier to detect than others. Generics add stability to your code by making more of your bugs detectable at compile time.
google/guava Java Blog Multithreading Programming Tutorial Java is amultithreaded programming language which means we can develop multithreaded program using Java. A multithreaded program contains two or more parts that can run concurrently and each part can handle different task at the same time making optimal use of the available resources specially when your computer has multiple CPUs. By definition multitasking is when multiple processes share common processing resources such as a CPU. Multithreading enables you to write in a way where multiple activities can proceed concurrently in the same program. Life Cycle of a Thread: A thread goes through various stages in its life cycle. Above-mentioned stages are explained here: New: A new thread begins its life cycle in the new state. Thread Priorities: Every Java thread has a priority that helps the operating system determine the order in which threads are scheduled. Java thread priorities are in the range between MIN_PRIORITY (a constant of 1) and MAX_PRIORITY (a constant of 10). Step 1: Step 2: Step 3