Intellij Warning - Generic Unchecked Assignment

java generics unchecked
EdgeCase picture EdgeCase · Sep 24, 2012 · Viewed 17k times · Source

Possible Duplicate:
Java Generics, how to avoid unchecked assignment warning when using class hierarchy?

Intellij is giving me the warning below. Not sure how to resolve it, or even if I need to resolve it. The warning details says it only applies to JDK 5, and I am using 6. I am wondering if I need to respond to this, and if so, how?

Method call causing warning

List<T> refObject = cache.getCachedRefObject(cacheKey, List.class);

Method being called

public  <T> T getCachedRefObject(String objectKey, Class<T> type) {
    return type.cast(refObjectCache.get(objectKey));
}

Warning details

Unchecked Assignment
JDK 5.0 only. Signals places where an unchecked warning is issued by the compiler, for example:
    void f(HashMap map) {
        map.put("key", "value");
    }

Answer

Peter Lawrey picture Peter Lawrey · Sep 24, 2012

Sounds like you have an old version of IntelliJ. This warning really means Java 5.0+ and AFAIK this was changed when IntelliJ supported Java 6 so the warning was there but didn't say "JDK 5.0 only" (it now has support for Java 8)

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