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摘要： This post introduces the benefits of the Declaring Dependencies on the top of the function or module. 阅读全文

摘要： If you're tempted to write a class with an explicit tag field, think about whether the tag could be eliminated and the class replaced by a hierarchy. When you encounter an existing class with a tag field, consider refactoring it into a hierarchy. 阅读全文

摘要： In practice, it depends whether a given object has an appropriate interface. If it does, your program will be more flexible if you use the interface to refer to the object; if not, just use the least specific class in the class hierarchy that provides the required functionality. 阅读全文

摘要： This post introduces the challenge and related solution (Atomic, Locks) on Thread Safety. 阅读全文

摘要： Don't use the string concatenation operator to combine more than a few strings unless performance is irrelevant. Use StringBuilder's append method instead. Alternatively, use a character array, or process the strings one at a time instead of combining them. 阅读全文

摘要： Other developers using your code will probably expect the built-in JavaScript methods to work consistently and will not expect your additions. And properties you add to the prototype may show up in loops that don't use hasOwnProperty(), so they can create confusion.Please be cautious of Augmenting Build-in Prototypes. 阅读全文

摘要： Document every exception that can be thrown by each method that you write. This is true for unchecked as well as checked exceptions, and for abstract as well as concrete methods. Provide individual throws clauses for each checked exception and do not provide throws clauses for unchecked exceptions. If you fail to document the exceptions that your methods can throw, it will be difficult or impossible for others to make effective use of your classes and interfaces. 阅读全文

摘要： The for-each loop provides compelling advantages over the traditional for loop in clarity and bug prevention, with no performance penalty. You should use it wherever you can. 阅读全文

摘要： The Builder pattern is a good choice when designing classes whose constructors or static factories would have more than a handful(>4) of parameters. 阅读全文

摘要： 实现ICloneabl接口听起来很美，不是么？还真不是，你要是为某个类实现了ICloneable接口，你就得为它的子类和相关的深拷贝和浅拷贝担心，注意每一属性的可被复制的深浅及其被复制的必要性。这看起来是多么大的一个工程，也许远远超出你的想象。 阅读全文