import java.util.Arrays;

/**
 *
 * @author Daniel Heinrich <dannynullzwo@gmail.com>
 */
public class Test<E extends Number> {

    void test1()
    {
        try{
            E[] a = alloc(3);
            System.out.println("test1 win");
        }catch(Throwable t)
        {
            System.out.println("test1 fail");
        }
    }
    
    void test2()
    {
        try{
            E b = null;
            E[] a = alloc(3, b);
            System.out.println("test2 win");
        }catch(Throwable t)
        {
            System.out.println("test2 fail");
        }
    }

    public static <T> T[] alloc(int length, T... base) {
        return Arrays.copyOf(base, length);
    }

    public static void main(String[] args) {
        Test<Integer> a = new Test<>();
        a.test1();
        a.test2();
    }
}