By Joshua Bloch
(Pearson schooling) operating strategies to programming demanding situations confronted by way of Java builders each day, revealing what to do to supply transparent, powerful and effective code. contain ideas in brief essay shape, and the author's 'war stories,' giving recommendation and insights into nuances of the language. Softcover.
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Extra info for Effective Java: Programming Language Guide
The accessibility of an entity is determined by the location where it is declared and by which, if any, of the access modifiers (private, protected, and public) is present in the entity's declaration. Proper use of these modifiers is essential to information hiding. The rule of thumb is that you should make each class or member as inaccessible as possible. In other words, you should use the lowest possible access level consistent with the proper functioning of the software that you are writing.
2 examined at most sixteen characters, evenly spaced throughout the string, starting with the first character. For large collections of hierarchical names such as URLs, this hash function displayed exactly the pathological behavior noted here. Many classes in the Java platform libraries, such as String, Integer, and Date, specify the exact value returned by their hashCode method as a function of the instance value. This is generally not a good idea, as it severely limits your ability to improve the hash function in future releases.
Technically known as default access, this is the access level you get if no access modifier is specified. 2]) and from any class in the package where it is declared. public— The member is accessible from anywhere. After carefully designing your class's public API, your reflex should be to make all other members private. Only if another class in the same package really needs to access a member should you remove the private modifier, making the member package-private. If you find yourself doing this often, you should reexamine the design of your system to see if another decomposition might yield classes that are better decoupled from one another.
Effective Java: Programming Language Guide by Joshua Bloch