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Class cast problem

In the code below, the last line is giving a compile error, saying that it cannot from Object[] to Class[]

Class[] tempTaskClasses = Reflection.getPackageMembers("com.mycompany.mypackage");
List<Class> tempList = Arrays.asList(tempTaskClasses);
List<Class> tempOutList = new ArrayList<Class>();
    for (Class myClass : tempList) {
 		tempOutList.add(myClass);
    }
 	
}
Class[] taskClasses =  tempOutList.toArray();

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This fixes it:

Class[] taskClasses =  (Class[]) tempOutList.toArray();

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but I don't understand why this is necessary. Even so, it gives a runtime error:

java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Ljava.lang.Class;

for_yan

Becuase
toArray() method of the List produces array of Objects

http://docs.oracle.com/javase/6/docs/api/java/util/ArrayList.html#toArray%28%29

so you eed to cast it to arrayr of object of scertain type Class which are suvlcalsses
of Object and downcast requires expliscit cast

for_yan

if toArray() method would have been producing array of Class oinstances
it wouyld be fine and would not have required it,
but the method produces array of Object instances - so you need to cast them to subclass

for_yan

Even if you have generic List<Class> it still produces array of Object instances in the toArray() method.

That probably is because genrics are not inherinting, so that ArrayList<Class> in Java is not subclass of ArrayList<Object>, that;s why this method returns only arry of Object's

So you have to cast

for_yan

this would of course work:

Class[] taskClasses = new Class[tempList.size()];

for (int j=0; j<tempList.size(); j++) {
taskClasses[j] = tempList.get(j);
}

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for_yan

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