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Effective Java, 3rd Edition | InformIT

You effective java have to worry about what state the object is in, and you can share effective java freely, with no need for synchronization. If you can't make an object immutable, at least minimize the amount of mutation that is possible.

This makes it effective java to use the object correctly. As an extreme example of what not to do, consider the case of java.


Very few people understand its state-space -- I certainly don't effective java and it's been a constant source of bugs for years.

So when should you break the rules? To paraphrase Orwell, you should break them when they'd result in code that is "outright barbarous. Because the most common use of this method is to effective java over the elements of its return value, and it's much cheaper to iterate over an array than any List implementation.

More Effective Java With Google's Joshua Bloch

With the for-each construct, the code to iterate is the same either way: This isn't just inner loop code, it is the effective java loop. Of course, we the JSR expert group did extensive performance measurements before making this decision, and I'm satisfied that effective java made the right decision.

Another time that you should break the rules is when two of the rules would drive you to opposite decisions.


In such cases, you're forced to violate at least one of the rules, and you have to choose which is more important, which can be very difficult. Effective java faced with such decisions, I typically discuss it with someone else effective java a sanity check. There's no shame in doing this, and it's arguably a best practice.

Effective Java, 3rd Edition [Book]

Contrary to popular belief, software design is not -- or should not be -- a solitary occupation. Generics, Enums, and Annotations "For generics, the sound bite is 'Don't use raw types.

If a library designer took the time to write a generic library, you should take advantage of it. Owing to space limitations, it has to be a small taste, but here goes. For generics, the sound effective java is "Don't use raw types" Item In other effective java, don't do this: By telling the compiler what kind of elements the list contains, you enable it to find many errors at compile time that would otherwise cause a ClassCastException at runtime.

You also effective java ugly casts from your program. For enums, the sound bite is "Always use enums in place of int constants" Item Enums provide so many advantages: Since we have EnumSet, this advice applies equally to bit fields, which effective java be considered obsolete. For annotations, the sound bite is "Don't define your own unless you have a very good reason, but do use the standard ones for your environment.

Using the Override annotation is an easy way to save yourself from errors that would otherwise be very hard to detect.