Java中的双冒号(::)运算符

In Java, the twofold colon (::) administrator, otherwise called the strategy reference administrator, is a strong element presented in Java 8. It gives a succinct and rich method for alluding to techniques or constructors without conjuring them. This administrator improves on the code and upgrades code coherence, making it an important instrument for designers. In this article, we will investigate the language structure of the twofold colon administrator, talk about its applications, and give code guides to better comprehension.

Syntax

双冒号操作符由两个冒号(::)夹在类名或对象引用和方法名之间。它用作Java中引用方法或构造函数的简写符号。

// A functional interface with a single abstract method interface Printer { void print(String message); } // A class that implements the Printer interface class ConsolePrinter { public static void printMessage(String message) { System.out.println(message); } } public class Main { public static void main(String[] args) { Printer printer = ConsolePrinter::printMessage; printer.print("Hello, World!"); } } 登录后复制