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JavaWorld
November 2001
Jeff Friesen
Class and object initialization An exploration of class and object initialization, which introduces the strange concepts of the <clinit> and <init> methods... mark for My Articles similar articles
JavaWorld
November 2001
Wm. Paul Rogers
J2SE 1.4 premieres Java's assertion capabilities, Part 1 J2SE (Java 2 Platform, Standard Edition) 1.4 adds a simple assertion facility to Java. This article, the first in a two-part series, covers the mechanics of using the new assertion facility... mark for My Articles similar articles
JavaWorld
November 2001
Brian Goetz
Can ThreadLocal solve the double-checked locking problem? ThreadLocal is indeed an underappreciated tool in the Java Class Library and does solve the thread-safety problems of DCL, but unfortunately it does not meet the performance objectives of DCL -- yet.... mark for My Articles similar articles
JavaWorld
October 2001
Java 101 study hall Brush up on Java terms, learn tips and cautions, and enter the first Java 101 reader challenge mark for My Articles similar articles
JavaWorld
February 2002
Anders Eliasson
Implement Design by Contract for Java using dynamic proxies The Design by Contract (DBC) theory can dramatically raise software quality and reusability levels by forcing you to think in terms of contracts. Contracts formally specify the responsibility relationship between a client (class user) and a supplier (class). Additionally, DBC clearly separates specification (what) from implementation (how). This article explains DBC's importance in object-oriented development and describes a DBCProxy framework that achieves DBC transparently in Java using dynamic proxy classes. mark for My Articles similar articles
JavaWorld
October 2000
Robert Nielsen
Understanding constructors To learn Java, you must understand constructors. Because constructors share some characteristics with methods, it is easy for the Java beginner to confuse them. However, constructors and methods have important differences... mark for My Articles similar articles
JavaWorld
May 2001
Brian Goetz
Can double-checked locking be fixed? This article looks at some of the commonly proposed fixes and shows how each of them fails to render the DCL idiom thread-safe under the Java Memory Model mark for My Articles similar articles
JavaWorld
February 2001
Brian Goetz
Double-checked locking: Clever, but broken Many Java programmers are familiar with the double-checked locking idiom, which allows you to perform lazy initialization with reduced synchronization overhead. Though many Java books and articles recommend double-checked locking, unfortunately, it is not guaranteed to work... mark for My Articles similar articles
JavaWorld
October 2001
Jeff Friesen
Object-oriented language basics, Part 7 This final installment of Java 101's object-oriented programming series explores Java's support for polymorphism and investigates how abstract classes accommodate generalities in class hierarchies. mark for My Articles similar articles
JavaWorld
September 2001
Jeff Friesen
Object-oriented language basics, Part 6 Learn why Java's standard class library contains empty interfaces (such as Cloneable and Serializable). Also, examine the power of interfaces and learn why they provide more than a workaround for Java's lack of multiple implementation inheritance support... mark for My Articles similar articles
JavaWorld
August 2002
Jeff Friesen
Achieve strong performance with threads, Part 4 The author completes his exploration of threads by focusing on thread groups, volatility, thread-local variables, timers, and the ThreadDeath class. mark for My Articles similar articles
JavaWorld
February 2002
Jeff Friesen
Classes within classes As with fields and methods, Java allows classes to be members of other classes. This article explores Java's support for class nesting... mark for My Articles similar articles
JavaWorld
January 2001
Wm. Paul Rogers
Thanks type and gentle class Confusing the concepts of object and class deserves an askance look. Failing to distinguish between type and class, however, typically goes unnoticed. Yet the battle to separate implementation and interface concerns requires type-oriented thinking... mark for My Articles similar articles
JavaWorld
December 2001
Letters to the Editor In this month's letters, David Geary expounds further on the Decorator pattern, Humphrey Sheil defends EJB performance, and Jeff Friesen talks more trash... mark for My Articles similar articles
JavaWorld
June 2002
Jeff Friesen
Achieve strong performance with threads, Part 2 Developers sometimes create multithreaded programs that produce erroneous values or exhibit other strange behaviors. Odd behavior typically arises when a multithreaded program does not use synchronization to serialize thread access to critical code sections. What does it mean to serialize thread access to critical code sections? This article explains Java's synchronization mechanism, and two problems that arise when developers fail to use that mechanism correctly. mark for My Articles similar articles
JavaWorld
August 2001
Jeff Friesen
Object-oriented language basics, Part 5 Every Java class has a superclass. In the absence of an extends keyword, Object is that superclass. Object takes center stage as this article presents its 11 methods... mark for My Articles similar articles
JavaWorld
December 2001
Wm. Paul Rogers
J2SE 1.4 premieres Java's assertion capabilities, Part 2 This installment discusses the methodology behind using assertions. Assertions are a valuable tool in assuring program correctness and should not be confused with the program robustness facilitated by Java's exception-handling process... mark for My Articles similar articles
JavaWorld
May 2001
Jeff Friesen
Object-oriented language basics, Part 2 In this article, you'll gain an understanding about fields, parameters, and local variables and learn to declare and access fields and methods... mark for My Articles similar articles
JavaWorld
June 2002
Letters to the Editor Shouldn't Microsoft get credit where credit is due? How do you program a Java class file into an iPAQ? JavaWorld authors answers those questions and more. mark for My Articles similar articles
JavaWorld
February 2001
Oliver Enseling
iContract: Design by Contract in Java The Design by Contract technique stresses the importance of explicitly specifying the constraints that hold before and after a software component executes. The iContract Java language extension implements Design by Contract for Java. mark for My Articles similar articles
JavaWorld
July 18, 2003
James Carman
Get down to business In this article, you will learn how to structure your applications such that modifications to the business object implementation do not require changes to the user interface using a simple framework for accessing your business objects. mark for My Articles similar articles
JavaWorld
March 2003
Letters to the Editor How do you handle failover in a Java Message Service (JMS) system? When is it safe not to declare a static field volatile in a threaded application? Is there synchronization hidden inside Struts? JavaWorld authors answer these questions and more in this month's Letters. mark for My Articles similar articles
JavaWorld
December 2001
Bill Pierce
Diagnose common runtime problems with hprof Ever been a few days from releasing an application when testing reveals a memory leak or something causing the CPU to spin out of control? Few people realize that the Java 2 JDK provides a useful profiling tool called hprof, which you can use to diagnose these behaviors with minimal fuss... mark for My Articles similar articles
JavaWorld
June 2001
Jeff Friesen
Object-oriented language basics, Part 3 The author explores composition and demonstrates its value in object-oriented programming. Composition and inheritance are design consepts related in a manner similar to both sides of the same coin... mark for My Articles similar articles
JavaWorld
November 2000
Geoff Friesen
Applications, applets, and hybrids This article establishes our bearings and sets sail to the land of applications, applets, and hybrids (an unusual category of Java programs)... mark for My Articles similar articles
JavaWorld
March 2002
Letters to the Editor JavaWorld readers warn about synchronization; present a Servlet 2.2-compliant solution for mixing protocols in Web apps; suggest using the Data Object Access design pattern with the Value Object design pattern... etc. mark for My Articles similar articles
JavaWorld
March 2002
James Carman
Write once, persist anywhere Most J2EE applications strive to abstract the database tier by employing the Data Access Object design pattern. This article shows you a DAO pattern framework that you can reuse on all your projects, regardless of object type... mark for My Articles similar articles
JavaWorld
December 2001
Jeff Friesen
Trash talk, Part 1 One feature that distinguishes Java from other computer languages is its garbage collection abilities. In this article, This article introduces garbage collection and shows how Java's optional support for it affects your programs... mark for My Articles similar articles
JavaWorld
October 2002
Jeff Friesen
Java's character and assorted string classes support text-processing Text-processing is one of the more frequent activities in which computer programs engage. Java supports that activity via the Character, String, StringBuffer, and StringTokenizer classes. This article explores each class and introduces you to an assortment of those classes' methods. mark for My Articles similar articles
JavaWorld
June 13, 2003
Camerlengo & Johnson
Make the Java-Oracle9i connection This article provides Java programmers with techniques for utilizing Oracle9i's new object-oriented features such as inheritance, custom constructors, dynamic dispatch, array descriptors, and mapping strategies from a Java class hierarchy to an Oracle type hierarchy without using traditional object-relational (O/R) mapping strategies. mark for My Articles similar articles
JavaWorld
September 2000
Frank Sommers
Activatable Jini services, Part 1: Implement RMI activation Jini services must be long-lived and resilient, and must efficiently manage their computational resources with little user intervention. This article shows how to use RMI activation to manage computational resources and increase the availability of Jini services... mark for My Articles similar articles
JavaWorld
April 2001
Piet Jonas
Secure type-safe collections A framework that overcomes the standard Java Collections Framework's main problem: its containers lack the ability to restrict themselves to storing objects of a specific type. The solution uses reflection, wrapper classes, and a collection of static factory methods... mark for My Articles similar articles
JavaWorld
October 2000
Frank Sommers
Activatable Jini services, Part 2: Patterns of use This article concentrates on the consequences of activation in the Jini context. Sommers exponds on the issue of deactivating objects, then considers the implications of deactivation for well-designed Jini services and how the Jini helper services introduced in the 1.1 beta version of the JSK can contribute... mark for My Articles similar articles
JavaWorld
April 2001
Geoff Friesen
Object-oriented language basics, Part 1 An introduction to object-oriented programming and how to declare classes and create objects from those classes... mark for My Articles similar articles
JavaWorld
July 2002
Jeff Friesen
Achieve strong performance with threads, Part 3 How priority relates to thread scheduling, how to use the wait/notify mechanism to coordinate the activities of multiple threads, and how to use Java's thread interruption capability to terminate a running thread. mark for My Articles similar articles
JavaWorld
July 2000
Jacob Weintraub
Learn how to store data in objects In this second installment of Java 101, Jacob Weintraub delves into storing data in Java and the various ways you can use that data. Specifically, he examines how objects store data and how you can pass data to objects in method calls... mark for My Articles similar articles
JavaWorld
September 2000
Bruce Eckel
Everything is an object, Part 1 This two-part article, excerpted from Chapter 2 in Thinking in Java 2nd. ed., moves you to the point where you can write your first Java program. Bruce Eckel gives an overview of the essentials... mark for My Articles similar articles
JavaWorld
February 2002
Dirk Reinshagen
Connect the enterprise with the JCA, Part 2 This article demonstrates a simple JCA (J2EE Connector Architecture) adapter implementation. After you read this article, you'll possess a good understanding of how to build your own JCA adapter... mark for My Articles similar articles
JavaWorld
February 2001
Geoff Friesen
Non-object-oriented language basics, Part 3 This exploration of Java's non-object-oriented language entities wraps up with a tour of statements. It provides an in-depth discussion on those source code constructs and demonstrates their proper use through a large example program... mark for My Articles similar articles
JavaWorld
October 2001
Brian Goetz
Avoid synchronization deadlocks If you understand how your programs use synchronization, and apply consistent rules for acquiring multiple locks simultaneously, you can reduce the likelihood of synchronization deadlock in Java programs... mark for My Articles similar articles
JavaWorld
December 2000
Michael C. Daconta
When Runtime.exec() won't This installment of Java Traps discusses one new pitfall and revisits another from the previous column. Originating in the java.lang package, the pitfall specifically involves problems with the Runtime.exec() method. mark for My Articles similar articles
JavaWorld
February 2001
Robert Nielsen
Learn Java from Ben Franklin While Benjamin Franklin never wrote a line of Java code, his techniques for better writing can be applied to writing Java. Anyone with at least a basic grasp of Java can use Franklin's learning methods... mark for My Articles similar articles
JavaWorld
July 2000
Todd M. Greanier
Flatten your objects The Java Serialization API is used by many other Java APIs (like RMI and JavaBeans) to persist objects beyond the duration of a running virtual machine. This article tries to demystify the secrets of the Java Serialization API. mark for My Articles similar articles
JavaWorld
September 26, 2003
Sam Mefford
Overcome Java 1.3-1.4 incompatibilities API version incompatibilities that force you to maintain separate codebases for newer versions can exponentially increase your frustration level. This article demonstrates techniques for overcoming interface version incompatibilities, charting a course for a single codebase. mark for My Articles similar articles
JavaWorld
July 2001
Jeff Friesen
Object-oriented language basics, Part 4 The author shows how to use inheritance to create layered objects, and compares and contrasts inheritance with composition... mark for My Articles similar articles
JavaWorld
February 2003
Laurence Vanhelsuwe
Unwrap the package statement's potential The package statement is a very powerful Java language feature. Yet most Java programmers, even experienced ones, fail to correctly exploit this power. Intrigued? Read on and see how a simple language feature can have massive repercussions downstream. mark for My Articles similar articles
JavaWorld
October 2001
Tony Loton
JavaMail quick start This article shows the first steps on the road to building Java-based email applications. If you fancy building your own email client to replace Microsoft Outlook, or a Web-based email system to rival Hotmail, this is the place to start... mark for My Articles similar articles
JavaWorld
March 2001
Jeffrey Peden
Browse user interfaces for Jini services The ServiceUI specification developed by the Jini.org community defines a suggested procedure for attaching user interfaces to Jini services... mark for My Articles similar articles
JavaWorld
May 2002
Ryan Daigle
Eliminate JDBC overhead Most J2EE and other types of Java applications interact in some way with information persisted in a database. Interfacing with that database involves several iterations of SQL statements, connection management, transaction lifecycles, result processing, and exception handling. The many parts of this ritualistic dance are common in all contexts; however, this replication doesn't have to exist. This article outlines a flexible framework that remedies the repetition of interacting with a JDBC-compliant database. mark for My Articles similar articles
JavaWorld
June 2002
Jason Byassee
Unleash mobile agents using Jini Mobile agents are powerful, versatile, and -- possibly most important -- fun to work with. Java's Jini framework facilitates mobile agent application development, providing key features for distributed network programming. mark for My Articles similar articles