Description

Checks for multiple occurrences of the same string literal within a single file.

Rationale: Code duplication makes maintenance more difficult, so it can be better to replace the multiple occurrences with a constant.

Examples

To configure the check:

<module name="MultipleStringLiterals"/>

To configure the check so that it allows two occurrences of each string:

<module name="MultipleStringLiterals">
    <property name="allowedDuplicates" value="2"/>
</module>

To configure the check so that it ignores ", " and empty strings:

<module name="MultipleStringLiterals">
    <property name="ignoreStringsRegexp" value='^(("")|(", "))$'/>
</module>

To configure the check so that it flags duplicate strings in all syntactical contexts, even in annotations like @SuppressWarnings("unchecked"):

<module name="MultipleStringLiterals">
    <property name="ignoreOccurrenceContext" value=""/>
</module>