具有无限参数的 Java 方法 [英] Java method with unlimited arguments

问题描述

Spring 框架使用的方法可以传递任意数量的参数.

The Spring framework uses methods where you can pass as many arguments as you like.

我想写一个函数，它也可以接受无限量的数据.这个功能是如何命名的，以便我可以阅读它?或者我如何定义它?

I would like to write a function that can also take an unlimited amount of data. How is this feature called so that I can read about it? Or how can I define it?

推荐答案

它叫做 可变参数.

它允许一个方法接受任意数量的参数.它们可以作为方法中的数组访问:

It allows a method to take any number of arguments. They are accessible as an array in the method:

public void foo(String... args) {
    for (String arg : args) {
      // do smth with arg.
     }
}

这是语法糖.编译器隐藏了数组的创建，而不是

This is syntactic sugar. The compiler hides the array creation, so instead of

 bar.foo(new String[] {"1", "2", "3"});

你写

 bar.foo("1", "2", "3");

这篇关于具有无限参数的 Java 方法的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！