General Java--tutorial.jcwcn.com

this：1/2 25records total:38 Start Previous Next Last goto:

What are JavaBeans?: ON: 2007-08-03 10:53:50; An article on JavaBeans, answers questions like what JavaBeans are and how to create your own JavaBean. Online demo available.; 8 times | category:

Java Technology: Asserting architectural soundness: ON: 2007-08-03 10:52:46; Paul Duvall returns from his hiatus in this installment of Automation for the People to demonstrate how you can discover architectural deviations by writing tests using JUnit, JDepend, and Ant to discover problems proactively instead of long after the fact.; 6 times | category:

Beyond Simple Objects in Java db4o: ON: 2007-08-03 10:51:50; So far, creating objects and manipulating them in db4o looks pretty easy -- maybe a little too easy, in fact. In this article, db4o enthusiast Ted Neward shows you what happens when simple objects become structured ones (that is, objects that reference objects) and issues like infinite recursion, cascading behavior, and referential integrity come into play.; 14 times | category:

Managing Volatility in the Java World: ON: 2007-08-03 10:24:48; In this installment of Java theory and practice, Brian Goetz explores some patterns for using volatile variables correctly and offers some warnings about the limits of its applicability.; 7 times | category:

JT-Java Trainer: ON: 2007-08-03 10:23:58; Java Trainer (JT) is for students who intend to learn Java , C#(or C++ for that matter). It is a simple programming system in a web page (no install), with a language close to C and Java, but cut-down; 6 times | category:

Determine the available memory in Java: ON: 2007-08-03 10:23:31; This tutorial will give you a brief walk through on Java memory use in the sandbox and show how to use the Runtime class to discover the amount of memory available to your Java applet or application; 18 times | category:

Interfaces in Java: ON: 2007-08-03 10:19:20; In Java, a class can have at the most one immediate superclass. Multiple inheritance, where a class has more than one superclass, is not allowed in Java. However, one cannot ignore the importance of multiple inheritance because a large number of real-life applications require the use of multiple inheritance. Java provides an alternative approach to support multiple inheritance by introducing a new data type known as interfaces. Although a class cannot inherit multiple classes, it can implement more than one interface.; 16 times | category:

Assertions in Java: ON: 2007-08-03 10:18:45; This article describes how assertion works in java. This feature is added in JDK1.4. This article also shows how one can enable and disable assertions in Java programs.; 7 times | category:

Tiles Tutorial: ON: 2007-08-03 10:18:17; A tutorial on Tiles an open source framework for making the presentation layer.; 6 times | category:

Java Arrays: ON: 2007-08-03 10:17:45; Arrays are dynamically created objects in Java code. An array can hold a number of variables of the same type. The variables can be primitives or object references; an array can even contain other arrays.; 5 times | category:

Declaring classes, variables, and methods: ON: 2007-08-03 10:17:08; Now let's look at ways we can modify classes, methods, and variables. There are two kinds of modifiers -- access modifiers and non-access modifiers. The access modifiers allow us to restrict access or provide more access to our code.; 6 times | category:

Constructors: ON: 2007-08-03 10:11:40; A constructor is used when creating an object from a class. The constructor name must match the name of the class and must not have a return type. They can be overloaded, but they are not inherited by subclasses.; 4 times | category:

Flow control statements: ON: 2007-08-03 10:11:03; The flow control statements allow you to conditionally execute statements, to repeatedly execute a block of statements, or to just change the sequential flow of control.; 2 times | category:

Assertions: ON: 2007-08-03 10:10:37; An assertion is a statement containing a boolean expression that is assumed to be true when the statement is executed. The system reports an AssertionError if the expression evaluates to false.; 3 times | category:

Exception handling: ON: 2007-08-03 10:10:04; Exceptions are Java objects; exception classes are derived from java.lang.Throwable.; 5 times | category:

Behavior of the garbage collector: ON: 2007-08-03 10:09:39; A Java programmer does not have to worry about memory management, because it is automatically taken care of by the garbage collector. The Java virtual machine (JVM) decides when to run the garbage collector. The garbage collector is a low priority thread that runs periodically, releasing memory used by objects that are not needed anymore.; 3 times | category:

Eligibility for garbage collection: ON: 2007-08-03 10:08:48; An object is eligible for garbage collection when no live thread can access it. An object can become eligible for garbage collection in different ways.; 4 times | category:

Finalization: ON: 2007-08-03 10:08:25; Java technology allows you to use the finalize() method to do the necessary cleanup before the garbage collector removes the object from memory.; 3 times | category:

Package and class declarations: ON: 2007-08-03 10:05:36; A package represents a group of classes.; 2 times | category:

Interfaces: ON: 2007-08-03 10:05:11; An interface is like a public class that has only abstract and public methods. The variables declared in an interface are implicitly public, static, and final.; 3 times | category:

Java keywords and identifiers: ON: 2007-08-03 10:03:11; Keywords are reserved words that are predefined in the language.; 5 times | category:

Literals: ON: 2007-08-03 09:54:29; Integer literals can be decimal, octal, or hexadecimal.; 2 times | category:

Using operators: ON: 2007-08-03 09:53:55; Understand assignment operators.; 3 times | category:

The equals() method: ON: 2007-08-03 09:53:30; We can use the == operator to compare the values of primitive variables and determine if they are equal. However, if object reference variables are compared using the == operator, it returns true only if the reference variables are referring to the same object. To check for the equality of two objects, the Object class provides the equals(Object obj) method, which can be overridden to return true for logically equal objects.; 3 times | category:

Passing variables into methods: ON: 2007-08-03 09:43:44; If the variable passed is a primitive, only a copy of the variable is actually passed to the method. So modifying the variable within the method has no effect on the actual variable.; 3 times | category: