如何初始化对象的数组？ [英] How to initialize an array of objects?

问题描述

我只是看着这个 SO帖子：

不过，哥伦比亚大学教授的笔记做它下面的方式。参见第9页。

However, the Columbia professor's notes does it the way below. See page 9.

Foo foos = new Foo[12] ;

哪条路是正确的？他们似乎说不同的东西。

Which way is correct? They seem to say different things.

特别是，在Notes版本没有 [] 。

Particularly, in the notes version there isn't [].

推荐答案

这根本不​​会用Java编译（因为你分配一个数组类型的值，以一个非数组类型的变量富）

This simply won't compile in Java (because you're assigning a value of an array type to a variable of a the non-array type Foo):

Foo foos = new Foo[12];

它是由的javac ，出现以下错误拒绝（参见：的http：// ideone。 COM / 0jh9YE ）：

it's rejected by javac with the following error (See also: http://ideone.com/0jh9YE):

test.java:5: error: incompatible types
        Foo foos = new Foo[12];

要拥有它编译，申报富为类型富[] 键，然后就在它循环：

To have it compile, declare foo to be of type Foo[] and then just loop over it:

Foo[] foo = new Foo[12];  # <<<<<<<<<

for (int i = 0; i < 12; i += 1) {
    foos[i] = new Foo();
}

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