Passing ArrayList to method declared with List

Question

I have a method with a parameter containing generics.

public static void readList(List list)
{
    // more code
}

I want

Answer 1

You can use wildcards, if you're using Java version 1.5 and higher.

public static void readList(List<? extends ModelObject> list)

This solution is more generic, because it fits for all java.util.List interface implementations and subclasses/subinterfaces of ModelObject. For more details go to wildcards tutorial