Compiler warning when casting to generic method type variable in Java

1 import java.lang.reflect.Method;

 2 import java.lang.reflect.InvocationTargetException;

 3

 4 public class Example

 5 {

 6    public static <T> void foo(Method method, String target, Object argument, T expectedReturn) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException

 7    {

 8       T actualReturn = (T) method.invoke(target, argument);

 9       System.out.print(actualReturn.equals(expectedReturn));

10    }

11    

12    public static void main(String[ ] args) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException

13    {

14       foo(String.class.getMethod("charAt", int.class), "test", 1, 'e');

15    }

16 }

       

T actualReturn = method.getReturnType( ).cast(method.invoke(target, argument));

       

Object actualReturn = method.invoke(target, argument);

System.out.print(actualReturn.equals(expectedReturn));

       

Object actualReturn = method.invoke(target, argument);

System.out.print(expectedReturn.equals(actualReturn));

       

public static <T> void foo(Class<T> returnType, Method method, String target, Object argument, T expectedReturn) throws NoSuchMethodException, IllegalAccessException, InvocationTargetException

{

    T actualReturn = returnType.cast(method.invoke(target, argument));

    System.out.print(actualReturn.equals(expectedReturn));

}

       

foo(Character.class, String.class.getMethod("charAt", int.class), "test", 1, 'e');