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，你可以在Java中拥有多少维数？

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

推荐答案

Java 语言不限制维度数，但Java VM 规范将维度数限制为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;
    }
}

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代表255或更少维度时有效。）

(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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