rspec/rules/S4065/java/rule.adoc

Java 8 introduced ``++ThreadLocal.withInitial++`` which is a simpler alternative to creating an anonymous inner class to initialise a ``++ThreadLocal++`` instance.


This rule raises an issue when a ``++ThreadLocal++`` anonymous inner class can be replaced by a call to ``++ThreadLocal.withInitial++``.


== Noncompliant Code Example

----
ThreadLocal<List<String>> myThreadLocal =
    new ThreadLocal<List<String>>() { // Noncompliant
        @Override
        protected List<String> initialValue() {
            return new ArrayList<String>();
        }
    };
----


== Compliant Solution

----
ThreadLocal<List<String>> myThreadLocal = ThreadLocal.withInitial(ArrayList::new);
----


ifdef::env-github,rspecator-view[]

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== Implementation Specification
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endif::env-github,rspecator-view[]