有多少String对象..？ [英] How many String object..?

问题描述

我和我的朋友正在讨论Strings，我们坚持这个：

Me and my friend was discussing on Strings and we stuck on this:

String str = "ObjectOne"+"ObjectTwo";

他说将创建三个对象，我说将创建一个对象。

He says total three Object will be created and I say one object will be created.

他对3个对象的逻辑是：一个用于ObjectOne，一个用于ObjectTwo，第三个是两个String对象的连接版本。

His logic behind 3 objects is: one for "ObjectOne" and one for "ObjectTwo" and third one is the concatenated version of two String objects.

我在一个对象后面的逻辑是在编译时，字符串对象将在字节代码中连接起来：

My logic behind one object is at compile time both the string objects will be concatenated in the byte code as:

String str = "ObjectOneObjectTwo";  

在运行时，只会以这种方式创建一个对象。这背后的真相是什么。

And at run time only one object will be created in such a way. What is the truth behind this.

推荐答案

如果你写（文字或常量）

If you write(literals or constants)

String str = "ObjectOne"+"ObjectTwo";

相当于

String str = "ObjectOneObjectTwo"; // compiler optimize it so one Object

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