As I installed SonarLint plugin in my eclipse IDE, i got the above (Heading) Major Issue.
Let's Assume:
public List<CountryModel> getAllCountries() {
return null; //***SonarLint Suggesest*: return an empty Collection instead of null.**
}
Can be modified (fixed) as below:
public List<CountryModel> getAllCountries() {
return Collections.emptyList();
}
Note: Similarly, I have a Set of CountryModel as below, and I tried to return Collections.emptyList();
public Set<CountryModel> getAllCountries() {
return Collections.emptyList();
}
I got Exception saying :
Type mismatch: cannot convert from
List<Object> to Set<CountryModel>.
Also Suggested saying, converting Set
to List<Object>
.
So how to resolve this issue **if I need Set, to Return an empty Collection and not null or nor conversion to List<Object>
?
Use Collections.emptySet()
instead of Collections.emptyList()
.
public Set<CountryModel> getAllCountries() {
return Collections.emptySet();
}
For more information, read the javadocs .
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