Calling a generic method generically still produces warnings.

[O. Ziggy]

I dont understand why the following call to testMethod() generates compiler warnings.

class Animal{}
class Dog extends Animal{}
class Cat extends Animal{}

class SubArrayList<T> extends ArrayList{}

class ZiggyTest2{

	public static void main(String[] args){					
		SubArrayList<Animal> nums = new SubArrayList<Animal>();
		testMethod(nums);
			
	}
	
	public static void testMethod(ArrayList<Animal> anim){
		System.out.println("In TestMethod");
	}
}	

The warning:

Note: ZiggyTest2.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

I thought the compiler warnings will only appear if you mix generic code with non-generic code.

[Tomasz Sochanski]

O. Ziggy wrote:
I thought the compiler warnings will only appear if you mix generic code with non-generic code.

SubArrayList schould be defined this way to avoid warnings:

class SubArrayList<T> extends ArrayList<T>{}  

[O. Ziggy]

ah thats where i made the mistake..

Thanks