Java 数组中的最大维数 [英] Maximum number of dimensions in a Java array

问题描述

出于好奇，您可以在 Java 中拥有多少维数组?

Out of curiosity, how many dimensions of an array can you have in Java?

推荐答案

Java 语言 不限制维数，但 Java VM 规范限制了维数尺寸为 255.

The Java language does not limit the number of dimensions, but the Java VM spec limits the number of dimensions to 255.

例如，以下代码将无法编译:

For example, the following code will fail to compile:

class Main {
    public static void main(String[] args) {
        final int[][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][]
                 [][][][][][][][][][][][][][][][] x;
    }
}

有错误:

1.java:18: error: array type has too many dimensions
                 [][][][][][][][][][][][][][][][] x;
                                                  ^
1 error

(参考:https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.1 数组类型描述符仅在表示 255 个或更少维度时才有效.")

(Ref: https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.1 "An array type descriptor is valid only if it represents 255 or fewer dimensions.")

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