CODEWITHSUNDEEP
javaproperties
Amzi
Amzi

Reputation: 399

What do curly braces inside a java property file mean?

We have many property files inside our java project. I don't understand the meaning of the integer values inside the curly braces.
Example:
validation.error=Input Validation Failed for field:[{0}]. Reason:[{1}]

Upvotes: 5

Views: 3419

Answers (3)

Philipp Sander
Philipp Sander

Reputation: 10249

The curly brackets are placeholders.

You can use placeholders in your messages and replace them with location-appropriate values at runtime based on the semantics of your user's language. For this you use the MessageFormat class.

Upvotes: 1

rgettman
rgettman

Reputation: 178253

They are for use with the MessageFormat class. Something of the form {n}, where n is a number, is a placeholder for a dynamic value.

There are additional things you can add to the placeholder for formatting purposes; see the linked Javadocs above for more information.

Upvotes: 3

Kayaman
Kayaman

Reputation: 73528

They're placeholders for parameters. When used, two parameters would be passed to indicate the name of the field and the reason for failure.

Upvotes: 2

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