问题描述
在 Java 中， String 对象的最大大小是多少，指的是 length（）方法调用？
In Java, what is the maximum size a String object may have, referring to the length() method call?
我知道 length（）返回<$的大小c $ c>字符串作为 char [] ;
推荐答案
考虑 class'方法返回 int ，即返回的最大长度该方法将是， 2 ^ 31 - 1 （或约20亿美元）。
Considering the String class' length method returns an int, the maximum length that would be returned by the method would be Integer.MAX_VALUE, which is 2^31 - 1 (or approximately 2 billion.)
在数组的长度和索引方面，（例如 char [] ，这可能就是内部数据表示是为 String s）实现的， 说明如下：
In terms of lengths and indexing of arrays, (such as char[], which is probably the way the internal data representation is implemented for Strings), Chapter 10: Arrays of The Java Language Specification, Java SE 7 Edition says the following:
此外，索引必须是 int 值，如在中提到：
Furthermore, the indexing must be by int values, as mentioned in Section 10.4:
因此，似乎限制确实是 2 ^ 31 - 1 ，因为这是最大值对于非负 int 值。
Therefore, it appears that the limit is indeed 2^31 - 1, as that is the maximum value for a nonnegative int value.
但是，可能会有其他限制，例如最大可分配数组的大小。
However, there probably are going to be other limitations, such as the maximum allocatable size for an array.
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