Home > Java > javaTutorial > body text

Understand the new java.util.function.*pojo reflection method in java8 (with code)

奋力向前
Release: 2021-09-14 11:57:46
forward
2657 people have browsed it

In the previous article "A brief analysis of the EOS blockchain grapefruit wallet front-end plug-in scatter development (sharing)", we learned about the development of the EOS wallet front-end plug-in scatter in the blockchain. The following article will introduce you to the new java.util.function.*pojo reflection method. Let’s take a look.

Understand the new java.util.function.*pojo reflection method in java8 (with code)

Go to the code and look at the example

Write an ordinary POJO

public class City {

    private String name;
    private String code;

    public City() {
    }

    public City(String name, String code) {
        this.name = name;
        this.code = code;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

}
Copy after login

Traditional way

// Use a constructor with parameters to create a City
City sf = new City("San Francisco", "SF");
// Use a default constructor with no parameters to create a City
City la = new City();
// Set the members using setters
la.setName("Los Angeles");
la.setCode("LA");
Copy after login

New getter access method

// Use the City's method references and assign them to functions
Function<City, String> getNameFunction = City::getName;
Function<City, String> getCodeFunction = City::getCode;

System.out.println("The code for "

        + getNameFunction.apply(sf)
        + " is "
        + getCodeFunction.apply(sf));

-> The code for San Francisco is SF
Copy after login

New setter access method

// Use the City&#39;s method references and assign them to biconsumers
BiConsumer<City, String> setNameBiConsumer = City::setName;
BiConsumer<City, String> setCodeBiConsumer = City::setCode;
City ny = new City();
setNameBiConsumer.accept(ny, "New York");
setCodeBiConsumer.accept(ny, "NY");
Copy after login

Access constructor to create new instance

// Use the City&#39;s constructor method reference to create
// a default constructor reference.
Supplier<City> defaultConstructor = City::new;

City sd = defaultConstructor.get();
sd.setName("San Diego");
sd.setCode("SD");
Copy after login

Builder with parameters

// Use the City&#39;s constructor method reference to create
// a two-parameter constructor reference.
BiFunction<String, String, City> twoParameterConstructor = City::new;

City dc = twoParameterConstructor.apply("Washington, D. C.", "DC");
Copy after login

Recommended learning: java video tutorial

The above is the detailed content of Understand the new java.util.function.*pojo reflection method in java8 (with code). For more information, please follow other related articles on the PHP Chinese website!

Related labels:
source:chuchur.com
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template
About us Disclaimer Sitemap
php.cn:Public welfare online PHP training,Help PHP learners grow quickly!