Is there any length limit for value kept in properties file?

Question

I have configAllowedUsers.properties.

It has single in Entry like the following:

users = abc, pew, rt, me1, me3, ku3,........

I have some doubts about length of value stored in it. I will read it using java.util.Properties. Thousands of usernames would be stored in it and I could not store them in database.

Answer 1

I had the same question in mind today, so I started researching. I did not find any limitations originating from java.util.Properties, so it is probably safe to assume that the rules are the same as for String:

• A String of length Integer.MAX_VALUE (which is 2³¹-1)
• Or half your maximum heap size,

Whichever is reached first in your environment.

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Of course, not finding any official statements on this topic does not prove that these assumptions are correct, but let's consider the Properties class innocent unless proven guilty.