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/* * decorator in linked list s point of view ?????? */class TestClass { String desc; TestClass tc; public TestClass(TestClass tc, String desc) { this.tc = tc;

(Item 11) ComparableWhy: by implementing comparable, your class can interoperate with many generic algorithms.Contract: compare the object with another, return a negative integer, zero, or positiv

 (Item 10) Override clone() judiciouslyGeneral Contractx.clone() != xx.clone().getClass() == x.getClass()x.clone().equal(x) == true In practice, a class that implements Cloneable is expe

(Item 2) singleton//use final fieldpublic class Elvis {        public static final Elvis INSTANCE = new Elvis(); //public field        private Elvis() { .. }} //use static factory, give

(Item 1) use static factory to substitute constructorsmore meaningful name than constructor namedon’t require to create new instance each time they’re invokedreturn object of any subtype (map st

(Item 7) Override equlas()1)    Use == to check “this”2)    Use instanceof to check type3)    Cast argument to correct type4)    Check equality of each significant fields5)      Ask yourself

(Item 6) Avoid finalizer1) Java Language Specification provide no guarantee that finalizer will get executed.2) Nothing time-critical should ever be done in finalizer (e.g. close file)3) Don’t s

[the content of this article is summaried from Thinking In Java]The process of creating an object. Consider a class called Dog: The first time an object of type Dog is created (the const

(Item 8) Override hashCode when you override equals()Incentivepublic final class PhoneNumber {         private final short areaCode;         private final short exchange;         private fin

(Item 5) Eliminate obsolete object referencespublic class Stack {     private Object[] elements;     private int size = 0;      public Stack(int initialCapacity) {         this.elements =

(Item 4) Avoid creating duplicate objects, reuse immutable objectsString s = new String(“Created each time when executed!!”); // DON’T DO THISA improved versionString s = “A reusable string”; 

[the content of this article is summaried from Thinking In Java]1)      Your object might not get garbage collectedAll is controlled by JVM2)      Garbage collection is not destructions3)   

在开发ejb之前，我们先得配置好服务器，我使用的是Weblogic9.0中文版，关于Weblogic9.0配置请看我的另一片文章。配置Weblogic9.0        首先需要配置好eclipse。我这里主要说明weblogic的配置。         注意JDK选择JDK5.0的版本。        顺便将weblogic8的配置也贴上来，供大家比较参考            注意weblo

Java Webx86 Assembly = ServletC  = JSPC++  = JSF================================Online Shopping CartHTTP Cookies vs. HTTP QueryString/Web beacon================================HTTP Query StringTec