Java is a general-purpose programming language that is used for developing mobile, web applications. Java language is the key language used for developing Android mobile applications. It is an object-oriented high-level programming language. Java programming is a multi-platform programming language. It is a write-once run anywhere language. It supports different platforms. Java syntax is similar to C and C++. Initial stages Java was criticized for its slower mode and it required more memory. But the introduction of just-in-time compilation improved the speed of Java programs significantly.
Now Java has released about 18 versions. It improved a lot. Java language is currently one of the best and most used languages by developers. The versatility of the language is the key to it. Among the Java versions, Java 18 is the latest one. But Java 17, Java 11, and Java 8 are the versions that have current and Long term use. Java 8 is supported for both commercial and personal use. These three Java versions are widely being used now.
Java 8 and its features
Java releases the Java 8 version back in 2014. But this version has a separate fanbase. This is one of the versions which is adapted to the current technological changes and is capable of future technological changes. Java 8 comes with a lot of features that have helped the developers who are working with the Java programming language. The key features of Java 8 are:
- Lamda Expressions
It is an important feature of Java 8. The lamda expressions help the developers to write their codes in a functional style. It helps in implementing the Simple Abstract Method interface by using expressions. Lamda expression is a feature that is very useful for java programming language developers.
- Method Reference
It is used to refer to the method of functional interface. It is another easy form of lamda expression. A developer can replace his lamda expression with a method reference.
- Optional Class
It is used to deal with the NullPointException in a Java application. New class Optional was introduced in Java 8 by Java. It helps to check the value of a particular variable.
- Default Methods
Java language in its version 8 provides the facility to create default methods inside the interface. These methods which are defined inside this interface and are tagged with the default keyword are called the default methods.
There are many classes provided by the Java programming language such as Optional class, Method class, Object class, etc. Collectors are the final class which is extended to the object class. It helps in the reduction of operations. For example, it reduces the accumulation of operations, reduces accumulating elements, and summarizes elements that are according to various criteria.
Java Collectors and Methods
Collectors are explained as the final class which is extended to the object class. The collectors in Java help the developers to reduce operations and thereby reduce the complications in the development process. For example, for converting a data to a set the collectors are used. The methods of the collectors can be used to convert the data as a set. The collectors help the developers to do their work without many complications and errors.
Some of the methods and uses of Java collectors are listed below:
- Public static <T> Collector <T,?, Double> averagingDouble – Used to return a collector which produces the arithmetic mean.
- Public static <T> Collector <T,?, T> reducing – A Collector that performs reduction using provided identity
- Public static <T> Collector <T,?,Optional<T>>reducing – A Collector that performs reduction. The result can be described as an Optional<T>
- Public static <T> Collector <T,?,Map<Boolean,List<T>>>partitioningBy – Returns collector which partitions the input elements
- Public static <T> Collector<T,?,DoubleSummaryStatistics>summarizingDouble – Coleecctor which gives double producing mapping function.
Java 8 which is released years ago is still in use because of its efficiency. The collectors feature in Java 8 is the one that made it a favorite among developers. Java programming language and its versions are technically updated and are top among other programming languages.
Entri provides Java programming language courses.