Affects PMD Version: 6.30.0

Rule: UseEqualsToCompareStrings

Description:
The rule detects a violation even though not two String variables but the results of the ".isEmpty()" method calls are compared.

This might be related to #2976 as CompareObjectsWithEquals falsely detects this as well.

Neither of the violations are reported if the variables are declared as "String" instead of "var".

Code Sample demonstrating the issue:

final Matcher matcher = ...;

if (matcher.matches()) {

final var firstString = matcher.group("a");
final var secondString = matcher.group("b");

if (firstString.isEmpty() != secondString.isEmpty()) { // <- violation
    // ...
}

}

Expected outcome:

• The compared values are boolean, not Strings -> false-positive

Running PMD through: Other