Java 8 features | Java 8 | Java 8 Tutorial
Java 8 features | Java 8 | Java 8 Tutorial | features of Java 8:
1. Functional interfaces 6. Static methods in interface
2. Lambda expressions 7. ForEach() method
3. Method references 8. StringJoiner
4. Stream API 9. Optional class
5. Default methods
Features:
1. Functional interfaces: An Interface that contains only one abstract method is known as functional interface. It can have any number of default and static methods.
2. Lambda expressions: Lambda expression helps us to write our code in functional style.
2.1 Without parameter
2.2 With parameters
2.3 Runnable
2.4 forEach
2.5 Comparator
3. Method references: Java 8 Method reference is used to refer method of functional interface . It is compact and easy form of lambda expression.
3.1 Reference to a static method.
3.2 Reference to an instance method.
3.3 Reference to a constructor.
4. Stream API: Java 8 java.util.stream package consists of classes, interfaces and an enum to allow functional-style operations on the elements. It performs lazy computation.
5. Default methods: Java provides a facility to create default methods inside the interface. Methods which are defined inside the interface and tagged with default keyword are known as default methods.
6. Static methods in interface
7. forEach: Java provides a new method forEach() to iterate the elements. It is defined in Iterable and Stream interfaces.
8. StringJoiner
9. Optional: It is a new class. It is a public final class which is used to deal with NullPointerException in Java application.
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