数组初始化差异java [英] Array initialization differences java

问题描述

以下两种数组初始化方法有什么区别：

What is the difference between the two following methods of array initialization:

1. Object [] oArr = new Object [] {new Object（），new Object（）};


2. Object [] oArr = {new Object（）， new Object（）};

1. Object[] oArr = new Object[] {new Object(), new Object()};
2. Object[] oArr = {new Object(), new Object()};

它与堆/堆栈分配有关吗？

Is it related to heap/stack allocation?

谢谢！

推荐答案

根本没有 - 它们只是表达方式的不同方式同样的事情。

None at all - they're just different ways of expressing the same thing.

然而，第二种形式仅在变量声明中可用。例如，你不能写：

The second form is only available in a variable declaration, however. For example, you cannot write:

foo.someMethod({x, y});

但你可以写：

foo.someMethod(new SomeType[] { x, y });

Java语言规范的相关部分是 10.6 - 阵列初始化器：

The relevant bit of the Java language specification is section 10.6 - Array Initializers:

数组初始值设定项可以在声明中指定，
或作为数组创建表达式（第15.10节）的一部分，创建数组并提供一些初始值：

An array initializer may be specified in a declaration, or as part of an array creation expression (§15.10), creating an array and providing some initial values:

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