Question

Quick question about syntax in Java. I want to take a Set and return a List in a static method for a library. The following gives a compiler error and I don’t know why:

public static List<T> asList(Set<T> keySet)
{
    // TODO Auto-generated method stub
    return null;
}

The message is “T cannot be resolved to a type”. But isn’t that the syntax for a generic type in Java?

Answer 1

For a generic method you need to put the type <T> before the return argument also e.g.

public static <T> List<T> asList(Set<T> keySet)
{
    // TODO Auto-generated method stub
    return null;
}