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max line length for a .properties file

Stephen Ferg

Joined: Apr 23, 2007
Posts: 9
I use Spring and properties file. But I don't think this is a specific spring question so I choose to post it here --- what's the max line length allowed in a .properties file. I have a file. Some lines have about 220 characters. it works fine. Do you know if there is a max line length for such file ?

Paul Clapham

Joined: Oct 14, 2005
Posts: 19973

There isn't one. Otherwise the part of the documentation which explains the contents of the file in excruciating detail would mention it.

Actually I didn't check the documentation before I typed that, but I'm sure it's true. It isn't in the nature of Java to have arbitrary restrictions like that. Each line is read into a String and there's no arbitrary limit on the length of a String, so there you go. In other languages you might be reading data into some kind of fixed-length string thing, but Java doesn't really have fixed-length string things.
Rob Spoor

Joined: Oct 27, 2005
Posts: 20279

There is obviously the Integer.MAX_VALUE limit, but after checking the source code I didn't see any other limit.

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