What is the data type for length property for Java arrays?

StackOverflow https://stackoverflow.com/questions/211311

  •  03-07-2019
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Question

I want to find out if length property for Java arrays is an int/long or something else.

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Solution

It is an int. See the Java Language Specification, section 10.7.

OTHER TIPS

In Java Language spec, Arrays you can see in 10.4:

Arrays must be indexed by int values; short, byte, or char values may also be used as index values because they are subjected to unary numeric promotion and become int values. An attempt to access an array component with a long index value results in a compile-time error.

I could not find the type of the length attribute, but it is at least an int; and if it's a long then you can not access elements beyond the max integer length.

So I guess it's a (final) int.

According to the specification, it's an int

The data type is int, not long. Same as the index.

See http://java.sun.com/docs/books/jls/second_edition/html/arrays.doc.html, 10.4

In JavaCard array indexes are shorts, but JavaCard is odd like that. Everywhere else, int like everyone else says.

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