Call to 'Arrays.asList()' with too few arguments
Reports calls to Arrays.asList() with at most one argument.
Such calls could be replaced with Collections.singletonList(), Collections.emptyList(), or List.of() on JDK 9 and later, which will save some memory.
In particular, Collections.emptyList() and List.of() with no arguments always return a shared instance, while Arrays.asList() with no arguments creates a new object every time it's called.
Note: the lists returned by Collections.singletonList() and List.of() are immutable, while the list returned Arrays.asList() allows calling the set() method. This may break the code in rare cases.
Example:
List<String> empty = Arrays.asList();
List<String> one = Arrays.asList("one");After the quick-fix is applied:
List<String> empty = Collections.emptyList();
List<String> one = Collections.singletonList("one");- By ID
Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.
ArraysAsListWithZeroOrOneArgument
You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:
//noinspection ArraysAsListWithZeroOrOneArgumentnote
Actual comment syntax will depend on the code language you are working with
More detailed instructions as well as other ways and options that you have can be found in the product documentation:
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