公共静态主变量的变体(字符串args []) [英] variations on public static main (String args[])

问题描述

这4种方法签名之间有什么区别，为什么第4种签名不起作用?

What is the difference between these 4 method signatures, and why does the 4th not work?

public void main(String args[]) {... } 
public void main(String[] args) {... }
public void main(String... args) {... }
public void main(String[] args[]) {... }

推荐答案

前三个等效. ^* 最后一个等效于String[][] args(即数组数组)，它不与Java对main的要求不符.

The first three are equivalent.^* The last one is equivalent to String[][] args (i.e. an array of arrays), which doesn't match what Java requires for main.

但是，惯用的版本是第二个.

However, the idiomatic version is the second one.

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_{*第三个仅从Java 5起有效.}

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