Java Stream: Safe Handling of Null Values in orElseGet

return Stream.of(LocalAndMunicipalCompanyEnum.values()).filter(predicate).findFirst().map(mapper).orElseGet(() -> { if (value != null) { return value; } else { return defaultValue; } }); In this updated code, the "orElseGet" method uses a lambda expression that checks if the "value" variable is null. If it is not null, the non-null case is handled and the value is returned. If it is null, the null case is handled and the defaultValue (replace defaultValue with your desired default value) is returned.