Evening!

I have the following Map:

```
HashMap<String, ArrayList> myMap = new HashMap<String, ArrayList>();

```

I then added the following data to it:

```
ArrayList myList = new ArrayList();
myList.add("Test 1");
myList.add("Test 2");
myList.add("Test 3");
myMap.put("Tests", myList);

```

This left me with the following data:

**Key:** Tests

---

**Values:** Test 1, Test 2, Test 3

My question is, how do I then add new values on to my already existing key? So for example, how could I add the value "Test 4" onto my key "Tests".

Thanks.