Java 9 Private Interface Method » grokonez

https://grokonez.com/java/java-9/java-9-private-interface-method

Java 9 Private Interface Method

In this article, we’re gonna take a look at Java 9 Private Interface Method which helps us avoid duplicate code and keep encapsulation for interface.

1. Java 8 - Interface

Java 8 provides 2 new features for Interface: default methods and static methods.

This is an example of Java 8 interface:

public interface ICustomerService {

	default void healthcare(String name) {
		System.out.println(name + " registers for customer service.");
		System.out.println("-- get HealthCare Service.");
	}

	default void consult(String name) {
		System.out.println(name + " registers for customer service.");
		System.out.println("-- get Consultation Service.");
	}
}

To make code easy to read and clear, we can create new register() method inside:

More at:

https://grokonez.com/java/java-9/java-9-private-interface-method

Java 9 Private Interface Method

#java #java9 #interface-method

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Buddha Community

How to Install OpenJDK 11 on CentOS 8

What is OpenJDK?

OpenJDk or Open Java Development Kit is a free, open-source framework of the Java Platform, Standard Edition (or Java SE). It contains the virtual machine, the Java Class Library, and the Java compiler. The difference between the Oracle OpenJDK and Oracle JDK is that OpenJDK is a source code reference point for the open-source model. Simultaneously, the Oracle JDK is a continuation or advanced model of the OpenJDK, which is not open source and requires a license to use.

In this article, we will be installing OpenJDK on Centos 8.

#tutorials #alternatives #centos #centos 8 #configuration #dnf #frameworks #java #java development kit #java ee #java environment variables #java framework #java jdk #java jre #java platform #java sdk #java se #jdk #jre #open java development kit #open source #openjdk #openjdk 11 #openjdk 8 #openjdk runtime environment

Going Beyond Java 8: Local Variable Type Inference (var) - DZone Java

According to some surveys, such as JetBrains’s great survey, Java 8 is currently the most used version of Java, despite being a 2014 release.

What you are reading is one in a series of articles titled ‘Going beyond Java 8,’ inspired by the contents of my book, Java for Aliens. These articles will guide you step-by-step through the most important features introduced to the language, starting from version 9. The aim is to make you aware of how important it is to move forward from Java 8, explaining the enormous advantages that the latest versions of the language offer.

In this article, we will talk about the most important new feature introduced with Java 10. Officially called local variable type inference, this feature is better known as the **introduction of the word **var. Despite the complicated name, it is actually quite a simple feature to use. However, some observations need to be made before we can see the impact that the introduction of the word var has on other pre-existing characteristics.

#java #java 11 #java 10 #java 12 #var #java 14 #java 13 #java 15 #verbosity

Functional Interfaces in Java 8

Introduction

Functional interface is an interface that consists of one abstract method. These interface can show only one functionality. Beyond Java 8, _lambda expressions _can be used to represent the instance of a functional interface. Functional Interfaces can contain any number of default methods. Consumer, Predicate, Function, Unary Operator, Binary Operator are some of the examples of predefined functional interfaces.

Points to remember which are allowed and which are not allowed in a functional interface:

• In any functional interface, single abstract method is allowed.
• In a functional interface, more than one abstract method cannot exist.
• We can have more than one abstract method if we remove @FunctionalInterface  annotation, but that interface cannot be functional interface.

From functional interface if we remove @FunctionalInterface annotation, it must be valid. We use an annotation so that only single abstract method can be present. In functional interface we can provide implementations as the default methods inside interface.

#functional programming #java #java #java 8 #functional interfaces #functional interfaces in java 8

Java 9 Private Interface Method » grokonez

https://grokonez.com/java/java-9/java-9-private-interface-method

Java 9 Private Interface Method

In this article, we’re gonna take a look at Java 9 Private Interface Method which helps us avoid duplicate code and keep encapsulation for interface.

1. Java 8 - Interface

Java 8 provides 2 new features for Interface: default methods and static methods.

This is an example of Java 8 interface:

public interface ICustomerService {

	default void healthcare(String name) {
		System.out.println(name + " registers for customer service.");
		System.out.println("-- get HealthCare Service.");
	}

	default void consult(String name) {
		System.out.println(name + " registers for customer service.");
		System.out.println("-- get Consultation Service.");
	}
}

To make code easy to read and clear, we can create new register() method inside:

More at:

https://grokonez.com/java/java-9/java-9-private-interface-method

Java 9 Private Interface Method

#java #java9 #interface-method

How to Bind Methods or Constructors to Functional Interfaces

To bind methods or constructors to functional interfaces, we are going to use the FunctionalInterfaceFactory of Burningwave Core library. FunctionalInterfaceFactory component uses to cache all generated functional interfaces for faster access. Before we start coding, we must add the following dependency to our _pom.xm_l:

XML

1

<dependency>2
    <groupId>org.burningwave</groupId>3
    <artifactId>core</artifactId>4
    <version>8.12.6</version>5
</dependency>

Constructors Binding

Methods Binding

Void Methods Binding

Binding to Methods with Boolean Return

Conclusion

#java #method #constructor #binding #functional interface #functional interfaces #binding in java