The best new features in the Java programming language: Reasons to upgrade from Java 8


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Probably the most helpful new language options in Java 9, 10,11 and 12.

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Java eight might have come out in March 2014 however builders aren’t in any rush to maneuver off it.

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Practically 80% of Java builders are nonetheless utilizing Java eight, in keeping with a fast ballot of greater than 1,300 devs by veteran Java developer and JetBrains developer advocate Trisha Gee.

With Java 12 due out in about one week’s time, stress is mounting on builders to maneuver to a more recent model of Java, significantly with Oracle ending public updates for Java eight for enterprise customers in January this yr.

On the on the QCon London 2019 developer convention Gee outlined a few of the finest new options added to the language since Java eight which may persuade builders to make the bounce.

SEE: Job description: Java developer (Tech Professional Analysis)

These are the language options that Gee highlighted as being probably the most promising causes to improve to a more recent model of Java.


When was it launched? Java 9

What it does: JShell supplies a command line at which builders can experiment with operating small snippets of Java, providing a easy approach to take a look at new options, permitting builders to create variables, outline strategies, and to save lots of scripts right into a file.


When was it launched? Java 9

What it does: Var cuts down on pointless code and will increase readability by stopping builders from having to repeatedly declare a sort inside code.

The function might be helpful the place builders would in any other case must declare the sort on either side of the = operator, for instance when utilizing generics:

ArrayList<Individual> individuals = new ArrayList<Individual>();

could possibly be written as:

var individuals = new ArrayList<Individual>();

Comfort manufacturing unit strategies for collections

When have been they launched? Java 9

What they do: Permits builders to create a genuinely unmodifiable Lists and Units, utilizing easier syntax.

Earlier variations of Java used to require builders to declare Record utilizing Arrays.asList(“element1”, “element2”) , which in flip needed to be wrapped utilizing the Collections.unmodifiableList() methodology, says Gee.

The code for attaining the identical final result is much extra simple from Java 9 onwards, merely requiring calling the Record.of() methodology, for instance, Record.of(“element1″,”element2”).

Equally, making a Set was once cumbersome, however can now be carried out utilizing the Set.of() methodology.

Making a Map can be easier, not requiring a static initializer however as a substitute being potential utilizing a Map.ofEntries()methodology name, or a Map.of() methodology name if there are fewer than 10 entries, which merely requires coming into key-value pairs.

“It’s kind of much less boilerplate and a bit extra readable, it is significantly helpful for issues like take a look at code,” says Gee.

New strategies on the stream API

When have been they launched? Java 9

What they do: There are two new strategies, takeWhile(), which permits a developer to specify that the info in a stream ought to be processed till a sure situation is met, and dropWhile(), which permits a developer to specify that the info in a stream ought to be ignored till a sure situation is met.

For instance, if a developer needed to course of information till the consumer depend hit a sure threshold:


.takeWhile(consumer -> consumer.depend() < maxCount)

.forEach(consumer -> place.incrementAndGet());

Accumulate into unmodifiable lists from streams

When was it launched? Java 10

What it does: Provides builders the flexibility to robotically populate unmodifiable lists from a stream utilizing easy syntax, for instance:




Jigsaw / Java Module System

When was it launched? Java 9

What it does? Jigsaw is beneficial for Java software program library builders, permitting them to encapsulate code that isn’t imagined to be altered.

Gee says additionally it is an excellent for for enterprise builders who need to correctly separate the issues inside their purposes.


When was it launched? Java 9

What it does? JLink permits builders to package deal up particular person Java modules, simply the bits of Java their utility wants, right into a small deployable runtime.

This supplies a way for deploying smaller purposes than can be the case when utilizing a conventional Java Runtime Surroundings, says Gee, helpful when deploying software program within the cloud or in containers.

New strategies on Non-compulsory

When have been they launched? Java 9, 10, 11

What they do? Gee describes Non-compulsory as a approach of hedging your bets when setting the return kind of a way, of claiming this methodology “may return one thing, it won’t” by setting it to return an Non-compulsory container.

These new strategies “simply make Non-compulsory simpler to work with,” she added.

For instance, builders can use the ifPresentOrElse() methodology to cut back the code wanted to specify the actions to take whether or not there’s something within the Non-compulsory container, e.g. within the case of an Non-compulsory container named anOptional:


s -> System.out.println(s),

() -> System.out.println(“Nothing discovered”)


As well as, Non-compulsory’s or() methodology can be utilized to return alternate non-compulsory values, the orElseThrow() methodology can return a default exception if not worth is discovered, and the isEmpty() methodology checks whether or not the Non-compulsory container is empty.

Constructed-in HTTP consumer

When was it launched? Java 11

What it does? Java 11 comes with a built-in HTTP consumer, eradicating the necessity for extra software program dependencies, with the consumer being non-blocking, supporting reactive streams, in addition to HTTP/1 and HTTP/2.

Change expressions

When will it’s launched? Java 12

What it does? As a result of be launched with the discharge of Java 12 in about one week’s time, change expressions enable builders to make use of easier syntax for change statements.

For instance, somewhat than every case inside the change assertion utilizing one of these syntax:

change (port)

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