If you are considering Java 8 then you need to remember about Lambdas. But it is just a part of it. There are lots of new features in Java 8 and few of them are new classes and idioms while few of them are just things from the get-go. Here are few gems you need to know about.
1) Default Methods:
Java language has new addition where you can now include method bodies for interfacing. With every class, such methods are implicitly included. This helps you in including the functionality for current libraries without any code breakage. This is definitely an advantage. The line between an interface is blurred seriously on the other side which actually stands for contract purpose and a class which offers its concrete implementation. For making the interfaces smarter, this has to be in the right hand and almost one ignore extend libraries and repetition.
2) Process Termination:
An external process can be launched by significant things you are aware of getting back when the process bumps, hangs or takes 100 % CPU. There are two new methods that the process class now comes equipped with for taking control of unruly processes.
To begin with, isAlive(), offers you simple check of the process which is regarded without needing to wait for it. The next which has lots of power is destroyForcibly () which assist in forcibly killing a process which is actually not necessary.
Let us see an interesting topic over here, it is not possible to synchronize the code. It is regarded as the sure-fire way for decreasing the app’s throughput or worse- leading towards hanging the code. Even otherwise it is not possible to have a choice.
There are lots of idioms for engaging with the multi-threaded access along with a resource. ReadWriteLock is one of the most venerated ones and its associated implementations. You can decrease the contention with the help of idiom by permitting various threads for consuming a resource while only thread blocking for manipulating it.
A new RWLock termed as StampedLock is unveiled by Java 8. It provides a strong API for the positive outlook, where you can get a reader lock at a very cheap cost, assisting that no write operation occurs with an important section.
4) Concurrent Adders:
This is one more little gem for most of them working on lots of apps. For the purpose of reading and writing counters with lots of apps from various threads that is faster than using AtomicIntegers.
5) Optional Values:
The problem with all the Java developers is none other than NullPointers. It is regarded as most famous of all the exceptions and it has been around since the start of the time. Obtaining from Scala and Haskell, for wrapping the references, Java 8 has a new template regarded as Optional and it is possible to be null. For ending the nulls, it is not regarded as a silver bullet but it implies for an API designer for implying the code level that may be given back or passed to a method and the caller must prepare for it. This happens only for new APIS and considering callers do not make the reference escape the wrapper it can be dereferenced unsafely.
This feature can be considered ambivalent. On the contrary, nulls are regarded as a huge problem, therefore, it is good to keep things on the front. This feature is quite ambivalent with null remains along with a huge problem, therefore, appreciate whatever done in the front. On the contrary, the need is skeptical and it is employing optional needs continuing company-wide effort with less immediate value.