Java方法具有无限的参数 [英] Java method with unlimited arguments

问题描述

Spring框架的使用方法，在这里，只要你喜欢，你可以传递尽可能多的参数。

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

我想编写一个函数，也可以采取数据无限量的。怎么叫这个功能让我能读到它。或者，我该怎么界定呢？

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?

太感谢了。

推荐答案

这就是所谓的可变参数。

它允许采取任何数目的参数的方法。它们是在该方法的阵列访问：

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。编译器隐藏了数组创建，所以不是

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");

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