泛型与方法重载

我有3种方法：

//1 -- check one item
public static <T> void containsAtLeast(String message,
                                       T expectedItem,
                                       Collection<? extends T> found) {
    if (!found.contains(expectedItem))
        Assert.fail("...");        
}

//2 -- check several items
public static <T> void containsAtLeast(String message,
                                       Collection<? extends T> expectedItems,
                                       Collection<T> found) {
    for (T exptetedItem : expectedItems)
        containsAtLeast(message, exptetedItem, found);        
}

//3 -- check several items, without message parameter
public static <T> void containsAtLeast(Collection<? extends T> expectedItems,
                                       Collection<? extends T> found) {
    containsAtLeast(null, expectedItems, found);
}

我希望该方法调用，但它没有，它调用方法。我的期望是否有错误？//3//2//1

*我使用 sdk 1.7.0_25 和 Eclipse 4.3*