How do you determine size of string array java?

Question

How do i read a file and determine the # of array elements without having to look at the text file itself?

String temp = fileScan.toString();
String[] tokens = temp.split("[\n]+");
// numArrayElements = ?

Almost duplicate of: stackoverflow.com/questions/453018/… . This has been answered and more effectively. — Μenelaοs
– Μenelaοs, Commented Sep 22, 2013 at 23:29
Unlike C/C++, in Java you can always determine the size of an array using length. — Hot Licks
– Hot Licks, Commented Sep 23, 2013 at 1:03

Konstantin Yovkov · Accepted Answer · 2013-09-22 23:26:39Z

5

Use the length property of the array:

int numArrayElements = tokens.length;

answered Sep 22, 2013 at 23:26

Konstantin Yovkov

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tbodt · Accepted Answer · 2013-09-22 23:26:33Z

2

The proper expression is tokens.length. So, you can assign numArrayElements like this:

int numArrayElements = tokens.length;

This counts the number of elements in the tokens array. You can count the number of elements in any array in the same way.

answered Sep 22, 2013 at 23:26

tbodt

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Hot Licks Over a year ago

Minor detail: length does not "count" the number of elements in the array. Rather, it returns the array size which was stored in the array header when the array object was created (and which cannot have changed since).

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